Datasets:

Qianxingyu
/

ACTOR-RL-12K

problem stringlengths 238 726	images listlengths 8 8	solution stringlengths 2 1.73k	data_source stringclasses 1 value	task_type stringclasses 7 values	scan_name stringlengths 18 22	patient_id stringlengths 7 11	prior_scan_name stringlengths 18 22 ⌀
<image><image><image><image><image><image><image><image> On visual review of the provided CT images, in which lung and anatomic region (lobe/segment and central vs peripheral) is the pulmonary nodule located? PACS Environment: - Total Slices: 223 - Current Window: lung - Initial View: Global overview (8 representative...	[ "images/trajectory_images/v2_localization_train_12608_a_1__nodule_localization_step0_z0_lung.jpg", "images/trajectory_images/v2_localization_train_12608_a_1__nodule_localization_step1_z27_lung.jpg", "images/trajectory_images/v2_localization_train_12608_a_1__nodule_localization_step2_z54_lung.jpg", "images/tra...	D. Right Upper Lobe	ct_reasoner_v2	localization	train_12608_a_1.nii.gz	train_12608	null
<image><image><image><image><image><image><image><image> On this chest CT image, which pulmonary lobe contains the visible nodule? PACS Environment: - Total Slices: 110 - Current Window: lung - Initial View: Global overview (8 representative frames) Options: A. Right Upper Lobe B. Right Lower Lobe C. Left Lower Lobe ...	[ "images/trajectory_images/v2_localization_train_13749_a_2__nodule_localization_step0_z0_lung.jpg", "images/trajectory_images/v2_localization_train_13749_a_2__nodule_localization_step1_z13_lung.jpg", "images/trajectory_images/v2_localization_train_13749_a_2__nodule_localization_step2_z26_lung.jpg", "images/tra...	D. Left Upper Lobe	ct_reasoner_v2	localization	train_13749_a_2.nii.gz	train_13749	null
<image><image><image><image><image><image><image><image> Describe the mediastinal findings and their evolution since the prior CT. PACS Environment: - Total Slices: 557 - Current Window: lung - Initial View: Global overview (8 representative frames)	[ "images/trajectory_images/v2_RegionReport_train_18039_c_2_vs_train_18039_b_2_step0_z0_lung.jpg", "images/trajectory_images/v2_RegionReport_train_18039_c_2_vs_train_18039_b_2_step1_z69_lung.jpg", "images/trajectory_images/v2_RegionReport_train_18039_c_2_vs_train_18039_b_2_step2_z138_lung.jpg", "images/trajecto...	Mediastinal lymph nodes remain subcentimeter. As previously, nodes <10 mm are present in the pretracheal, aortopulmonary window, and prevascular stations; current exam also notes subcentimeter subcarinal nodes, with no significant change in nodal size or number compared with the prior study. Thyroid gland volume has de...	ct_reasoner_v2	RegionReport	train_18039_c_2.nii.gz	train_18039	train_18039_b_2.nii.gz
<image><image><image><image><image><image><image><image> Does this chest CT show bronchiectasis? PACS Environment: - Total Slices: 220 - Current Window: lung - Initial View: Global overview (8 representative frames) Wrap your final answer in <answer>Yes</answer> or <answer>No</answer>.	[ "images/trajectory_images/v2_presence_train_9893_a_1__Bronchiectasis__presence_step0_z0_lung.jpg", "images/trajectory_images/v2_presence_train_9893_a_1__Bronchiectasis__presence_step1_z27_lung.jpg", "images/trajectory_images/v2_presence_train_9893_a_1__Bronchiectasis__presence_step2_z54_lung.jpg", "images/tra...	Yes	ct_reasoner_v2	presence	train_9893_a_1.nii.gz	train_9893	null
<image><image><image><image><image><image><image><image> Two chest CT examinations are performed 39 days apart; what is the appropriate interval change category for the lung ground-glass opacities on the later scan compared with the earlier scan? PACS Environment: - Total Slices: 248 - Current Window: lung - Initial V...	[ "images/trajectory_images/v2_ChangeClass_train_17999_g_1_vs_train_17999_f_1_Ground-glass_opaciti_step0_z0_lung.jpg", "images/trajectory_images/v2_ChangeClass_train_17999_g_1_vs_train_17999_f_1_Ground-glass_opaciti_step1_z30_lung.jpg", "images/trajectory_images/v2_ChangeClass_train_17999_g_1_vs_train_17999_f_1_G...	C. Shrinkage	ct_reasoner_v2	ChangeClass	train_17999_g_1.nii.gz	train_17999	train_17999_f_1.nii.gz
<image><image><image><image><image><image><image><image> Over a 173-day (~6-month) interval, is the rate of change observed in the pulmonary parenchyma on this chest CT clinically expected, or does it suggest an unusually rapid or slow process? PACS Environment: - Total Slices: 409 - Current Window: lung - Initial Vie...	[ "images/trajectory_images/v2_RegionReasoning_train_3653_b_2_vs_train_3653_a_2_step0_z0_lung.jpg", "images/trajectory_images/v2_RegionReasoning_train_3653_b_2_vs_train_3653_a_2_step1_z51_lung.jpg", "images/trajectory_images/v2_RegionReasoning_train_3653_b_2_vs_train_3653_a_2_step2_z102_lung.jpg", "images/traje...	Over 173 days, there is marked interval increase in measured aerated lobar volumes (Left upper lobe 583.8→966.7 cm³, +65.6%; Right middle lobe 219.4→301.8 cm³, +37.5%; Right lower lobe 671.5→1242.2 cm³, +85.0%) with resolution of both consolidation and lung opacity on the mask data. Given the report’s shift from multif...	ct_reasoner_v2	RegionReasoning	train_3653_b_2.nii.gz	train_3653	train_3653_a_2.nii.gz
<image><image><image><image><image><image><image><image> Based on visual review of this CT image, in which pulmonary lobe is the identified lung nodule located? PACS Environment: - Total Slices: 227 - Current Window: lung - Initial View: Global overview (8 representative frames) Options: A. Right Middle Lobe B. Left ...	[ "images/trajectory_images/v2_localization_train_13053_b_2__nodule_localization_step0_z0_lung.jpg", "images/trajectory_images/v2_localization_train_13053_b_2__nodule_localization_step1_z28_lung.jpg", "images/trajectory_images/v2_localization_train_13053_b_2__nodule_localization_step2_z56_lung.jpg", "images/tra...	A. Right Middle Lobe	ct_reasoner_v2	localization	train_13053_b_2.nii.gz	train_13053	null
<image><image><image><image><image><image><image><image> Describe the pulmonary findings and their evolution since the prior CT. PACS Environment: - Total Slices: 212 - Current Window: lung - Initial View: Global overview (8 representative frames)	[ "images/trajectory_images/v2_RegionReport_train_12297_b_1_vs_train_12297_a_2_step0_z0_lung.jpg", "images/trajectory_images/v2_RegionReport_train_12297_b_1_vs_train_12297_a_2_step1_z26_lung.jpg", "images/trajectory_images/v2_RegionReport_train_12297_b_1_vs_train_12297_a_2_step2_z52_lung.jpg", "images/trajector...	Biapical emphysematous changes persist. Right upper lobe posterior segment consolidation with air bronchograms remains, again favored to represent pneumonia; otherwise no active infiltrate is identified. Quantitatively, lung opacity has resolved, with interval increase in right upper lobe volume (654.3→805.8 cm³, +23.2...	ct_reasoner_v2	RegionReport	train_12297_b_1.nii.gz	train_12297	train_12297_a_2.nii.gz
<image><image><image><image><image><image><image><image> Based on visual review of the provided CT image, in which pulmonary lobe is the depicted lung nodule located? PACS Environment: - Total Slices: 241 - Current Window: lung - Initial View: Global overview (8 representative frames) Options: A. Right Upper Lobe B. ...	[ "images/trajectory_images/v2_localization_train_11474_a_1__nodule_localization_step0_z0_lung.jpg", "images/trajectory_images/v2_localization_train_11474_a_1__nodule_localization_step1_z30_lung.jpg", "images/trajectory_images/v2_localization_train_11474_a_1__nodule_localization_step2_z60_lung.jpg", "images/tra...	A. Right Upper Lobe	ct_reasoner_v2	localization	train_11474_a_1.nii.gz	train_11474	null
<image><image><image><image><image><image><image><image> What interval changes are observed in the thoracic vessels compared to the prior examination? PACS Environment: - Total Slices: 476 - Current Window: lung - Initial View: Global overview (8 representative frames)	[ "images/trajectory_images/v2_RegionReport_train_1184_b_2_vs_train_1184_a_1_step0_z0_lung.jpg", "images/trajectory_images/v2_RegionReport_train_1184_b_2_vs_train_1184_a_1_step1_z59_lung.jpg", "images/trajectory_images/v2_RegionReport_train_1184_b_2_vs_train_1184_a_1_step2_z118_lung.jpg", "images/trajectory_ima...	Over the 22-day interval, the thoracic aorta volume decreases from 224.5 to 194.5 cm³ (-13.4%). The mediastinal vascular structures are described as having a natural appearance on both exams, though current evaluation is limited by lack of contrast.	ct_reasoner_v2	RegionReport	train_1184_b_2.nii.gz	train_1184	train_1184_a_1.nii.gz
<image><image><image><image><image><image><image><image> Based on visual review of this chest CT image, which pulmonary lobe contains the depicted nodule? PACS Environment: - Total Slices: 512 - Current Window: lung - Initial View: Global overview (8 representative frames) Options: A. Right Lower Lobe B. Right Upper ...	[ "images/trajectory_images/v2_localization_train_16102_a_2__nodule_localization_step0_z0_lung.jpg", "images/trajectory_images/v2_localization_train_16102_a_2__nodule_localization_step1_z63_lung.jpg", "images/trajectory_images/v2_localization_train_16102_a_2__nodule_localization_step2_z126_lung.jpg", "images/tr...	C. Left Upper Lobe	ct_reasoner_v2	localization	train_16102_a_2.nii.gz	train_16102	null
<image><image><image><image><image><image><image><image> On serial chest CT review, what is the most appropriate interval change classification for the pericardial effusion between the prior and current examinations? PACS Environment: - Total Slices: 486 - Current Window: lung - Initial View: Global overview (8 repres...	[ "images/trajectory_images/v2_ChangeClass_train_5981_b_2_vs_train_5981_a_2_Pericardial_effusion_step0_z0_lung.jpg", "images/trajectory_images/v2_ChangeClass_train_5981_b_2_vs_train_5981_a_2_Pericardial_effusion_step1_z60_lung.jpg", "images/trajectory_images/v2_ChangeClass_train_5981_b_2_vs_train_5981_a_2_Pericar...	A. Resolution	ct_reasoner_v2	ChangeClass	train_5981_b_2.nii.gz	train_5981	train_5981_a_2.nii.gz
<image><image><image><image><image><image><image><image> When assigning an interval change category on serial chest CT, how should the right upper lobe parenchymal nodular involvement be classified? PACS Environment: - Total Slices: 293 - Current Window: lung - Initial View: Global overview (8 representative frames) -...	[ "images/trajectory_images/v2_ChangeClass_train_2913_c_1_vs_train_2913_b_2_Bilateral_lower-lobe_step0_z0_lung.jpg", "images/trajectory_images/v2_ChangeClass_train_2913_c_1_vs_train_2913_b_2_Bilateral_lower-lobe_step1_z36_lung.jpg", "images/trajectory_images/v2_ChangeClass_train_2913_c_1_vs_train_2913_b_2_Bilater...	C. Resolution	ct_reasoner_v2	ChangeClass	train_2913_c_1.nii.gz	train_2913	train_2913_b_2.nii.gz
<image><image><image><image><image><image><image><image> On comparing the two CT examinations separated by 11 days, how would you best classify the interval change in the hazy attenuation within the lung parenchyma across both lungs? PACS Environment: - Total Slices: 439 - Current Window: lung - Initial View: Global o...	[ "images/trajectory_images/v2_ChangeClass_train_8239_b_2_vs_train_8239_a_2_Patchy_ground-glass__step0_z0_lung.jpg", "images/trajectory_images/v2_ChangeClass_train_8239_b_2_vs_train_8239_a_2_Patchy_ground-glass__step1_z54_lung.jpg", "images/trajectory_images/v2_ChangeClass_train_8239_b_2_vs_train_8239_a_2_Patchy_...	C. Enlargement	ct_reasoner_v2	ChangeClass	train_8239_b_2.nii.gz	train_8239	train_8239_a_2.nii.gz
<image><image><image><image><image><image><image><image> Does the CT reveal lung nodule? PACS Environment: - Total Slices: 246 - Current Window: lung - Initial View: Global overview (8 representative frames) Wrap your final answer in <answer>Yes</answer> or <answer>No</answer>.	[ "images/trajectory_images/v2_presence_train_105_a_2__Lung_nodule__presence_step0_z0_lung.jpg", "images/trajectory_images/v2_presence_train_105_a_2__Lung_nodule__presence_step1_z30_lung.jpg", "images/trajectory_images/v2_presence_train_105_a_2__Lung_nodule__presence_step2_z60_lung.jpg", "images/trajectory_imag...	No	ct_reasoner_v2	presence	train_105_a_2.nii.gz	train_105	null
<image><image><image><image><image><image><image><image> Does this CT demonstrate emphysema? PACS Environment: - Total Slices: 455 - Current Window: lung - Initial View: Global overview (8 representative frames) Wrap your final answer in <answer>Yes</answer> or <answer>No</answer>.	[ "images/trajectory_images/v2_presence_train_12228_a_2__Emphysema__presence_step0_z0_lung.jpg", "images/trajectory_images/v2_presence_train_12228_a_2__Emphysema__presence_step1_z56_lung.jpg", "images/trajectory_images/v2_presence_train_12228_a_2__Emphysema__presence_step2_z112_lung.jpg", "images/trajectory_ima...	No	ct_reasoner_v2	presence	train_12228_a_2.nii.gz	train_12228	null
<image><image><image><image><image><image><image><image> How has the mediastinum changed on the current CT compared to the prior study? PACS Environment: - Total Slices: 271 - Current Window: lung - Initial View: Global overview (8 representative frames)	[ "images/trajectory_images/v2_RegionReport_train_6522_d_1_vs_train_6522_c_1_step0_z0_lung.jpg", "images/trajectory_images/v2_RegionReport_train_6522_d_1_vs_train_6522_c_1_step1_z33_lung.jpg", "images/trajectory_images/v2_RegionReport_train_6522_d_1_vs_train_6522_c_1_step2_z66_lung.jpg", "images/trajectory_imag...	Over the 146-day interval, the thyroid gland volume has increased from 8.8 to 10.9 cm³ (+23.6%). Previously noted hiatal hernia has resolved. Despite noncontrast technique limiting evaluation, no pathologically enlarged mediastinal or hilar lymph nodes are identified on either study, and the esophagus shows no abnormal...	ct_reasoner_v2	RegionReport	train_6522_d_1.nii.gz	train_6522	train_6522_c_1.nii.gz
<image><image><image><image><image><image><image><image> Based on visual review of the provided CT image, in which pulmonary lobe is the depicted lung nodule located? PACS Environment: - Total Slices: 244 - Current Window: lung - Initial View: Global overview (8 representative frames) Options: A. Left Upper Lobe B. R...	[ "images/trajectory_images/v2_localization_train_16683_a_1__nodule_localization_step0_z0_lung.jpg", "images/trajectory_images/v2_localization_train_16683_a_1__nodule_localization_step1_z30_lung.jpg", "images/trajectory_images/v2_localization_train_16683_a_1__nodule_localization_step2_z60_lung.jpg", "images/tra...	C. Left Lower Lobe	ct_reasoner_v2	localization	train_16683_a_1.nii.gz	train_16683	null
<image><image><image><image><image><image><image><image> Based on visual review of this CT image, in which pulmonary lobe is the depicted lung nodule located? PACS Environment: - Total Slices: 272 - Current Window: lung - Initial View: Global overview (8 representative frames) Options: A. Right Lower Lobe B. Left Upp...	[ "images/trajectory_images/v2_localization_train_15186_a_1__nodule_localization_step0_z0_lung.jpg", "images/trajectory_images/v2_localization_train_15186_a_1__nodule_localization_step1_z33_lung.jpg", "images/trajectory_images/v2_localization_train_15186_a_1__nodule_localization_step2_z66_lung.jpg", "images/tra...	C. Right Middle Lobe	ct_reasoner_v2	localization	train_15186_a_1.nii.gz	train_15186	null
<image><image><image><image><image><image><image><image> Based on visual review of the provided chest CT image, which pulmonary lobe contains the depicted lung nodule? PACS Environment: - Total Slices: 240 - Current Window: lung - Initial View: Global overview (8 representative frames) Options: A. Right Upper Lobe B....	[ "images/trajectory_images/v2_localization_train_18373_a_1__nodule_localization_step0_z0_lung.jpg", "images/trajectory_images/v2_localization_train_18373_a_1__nodule_localization_step1_z29_lung.jpg", "images/trajectory_images/v2_localization_train_18373_a_1__nodule_localization_step2_z58_lung.jpg", "images/tra...	D. Left Lower Lobe	ct_reasoner_v2	localization	train_18373_a_1.nii.gz	train_18373	null
<image><image><image><image><image><image><image><image> On serial CT review of the two examinations separated by 38 days, what is the most appropriate interval change classification for the pleural fluid in both hemithoraces? PACS Environment: - Total Slices: 509 - Current Window: lung - Initial View: Global overview...	[ "images/trajectory_images/v2_ChangeClass_train_5428_e_2_vs_train_5428_d_2_Bilateral_pleural_ef_step0_z0_lung.jpg", "images/trajectory_images/v2_ChangeClass_train_5428_e_2_vs_train_5428_d_2_Bilateral_pleural_ef_step1_z63_lung.jpg", "images/trajectory_images/v2_ChangeClass_train_5428_e_2_vs_train_5428_d_2_Bilater...	B. Resolution	ct_reasoner_v2	ChangeClass	train_5428_e_2.nii.gz	train_5428	train_5428_d_2.nii.gz
<image><image><image><image><image><image><image><image> Does this chest CT show emphysema? PACS Environment: - Total Slices: 274 - Current Window: lung - Initial View: Global overview (8 representative frames) Wrap your final answer in <answer>Yes</answer> or <answer>No</answer>.	[ "images/trajectory_images/v2_presence_train_9394_a_2__Emphysema__presence_step0_z0_lung.jpg", "images/trajectory_images/v2_presence_train_9394_a_2__Emphysema__presence_step1_z34_lung.jpg", "images/trajectory_images/v2_presence_train_9394_a_2__Emphysema__presence_step2_z68_lung.jpg", "images/trajectory_images/...	No	ct_reasoner_v2	presence	train_9394_a_2.nii.gz	train_9394	null
<image><image><image><image><image><image><image><image> Based on visual review of this CT image, which lung lobe contains the depicted pulmonary nodule? PACS Environment: - Total Slices: 213 - Current Window: lung - Initial View: Global overview (8 representative frames) Options: A. Right Upper Lobe B. Right Lower L...	[ "images/trajectory_images/v2_localization_train_5382_a_2__nodule_localization_step0_z0_lung.jpg", "images/trajectory_images/v2_localization_train_5382_a_2__nodule_localization_step1_z26_lung.jpg", "images/trajectory_images/v2_localization_train_5382_a_2__nodule_localization_step2_z52_lung.jpg", "images/trajec...	D. Left Upper Lobe	ct_reasoner_v2	localization	train_5382_a_2.nii.gz	train_5382	null
<image><image><image><image><image><image><image><image> Does this CT demonstrate lung nodule? PACS Environment: - Total Slices: 213 - Current Window: lung - Initial View: Global overview (8 representative frames) Wrap your final answer in <answer>Yes</answer> or <answer>No</answer>.	[ "images/trajectory_images/v2_presence_train_2520_b_1__Lung_nodule__presence_step0_z0_lung.jpg", "images/trajectory_images/v2_presence_train_2520_b_1__Lung_nodule__presence_step1_z26_lung.jpg", "images/trajectory_images/v2_presence_train_2520_b_1__Lung_nodule__presence_step2_z52_lung.jpg", "images/trajectory_i...	Yes	ct_reasoner_v2	presence	train_2520_b_1.nii.gz	train_2520	null
<image><image><image><image><image><image><image><image> On visual review of this CT image, what size category best describes the pleural effusion (e.g., small, moderate, or large)? PACS Environment: - Total Slices: 147 - Current Window: lung - Initial View: Global overview (8 representative frames) Options: A. Large...	[ "images/trajectory_images/v2_measurement_train_3666_a_2__nodule_size_step0_z0_lung.jpg", "images/trajectory_images/v2_measurement_train_3666_a_2__nodule_size_step1_z18_lung.jpg", "images/trajectory_images/v2_measurement_train_3666_a_2__nodule_size_step2_z36_lung.jpg", "images/trajectory_images/v2_measurement_...	C. Small	ct_reasoner_v2	measurement	train_3666_a_2.nii.gz	train_3666	null
<image><image><image><image><image><image><image><image> On visual review of this CT image, in which lung and which lobe is the pulmonary nodule located? PACS Environment: - Total Slices: 255 - Current Window: lung - Initial View: Global overview (8 representative frames) Options: A. Left Upper Lobe B. Right Upper Lo...	[ "images/trajectory_images/v2_localization_train_7859_a_1__nodule_localization_step0_z0_lung.jpg", "images/trajectory_images/v2_localization_train_7859_a_1__nodule_localization_step1_z31_lung.jpg", "images/trajectory_images/v2_localization_train_7859_a_1__nodule_localization_step2_z62_lung.jpg", "images/trajec...	C. Right Middle Lobe	ct_reasoner_v2	localization	train_7859_a_1.nii.gz	train_7859	null
<image><image><image><image><image><image><image><image> On visual review of this CT image, how would you classify the pleural effusion severity (e.g., small, moderate, or large)? PACS Environment: - Total Slices: 240 - Current Window: lung - Initial View: Global overview (8 representative frames) Options: A. Small B...	[ "images/trajectory_images/v2_measurement_train_1259_a_1__effusion_size_step0_z0_lung.jpg", "images/trajectory_images/v2_measurement_train_1259_a_1__effusion_size_step1_z29_lung.jpg", "images/trajectory_images/v2_measurement_train_1259_a_1__effusion_size_step2_z58_lung.jpg", "images/trajectory_images/v2_measur...	A. Small	ct_reasoner_v2	measurement	train_1259_a_1.nii.gz	train_1259	null
<image><image><image><image><image><image><image><image> Based on visual review of the provided CT image, in which pulmonary lobe is the depicted lung nodule located? PACS Environment: - Total Slices: 274 - Current Window: lung - Initial View: Global overview (8 representative frames) Options: A. Left Upper Lobe B. R...	[ "images/trajectory_images/v2_localization_train_7754_c_1__nodule_localization_step0_z0_lung.jpg", "images/trajectory_images/v2_localization_train_7754_c_1__nodule_localization_step1_z34_lung.jpg", "images/trajectory_images/v2_localization_train_7754_c_1__nodule_localization_step2_z68_lung.jpg", "images/trajec...	A. Left Upper Lobe	ct_reasoner_v2	localization	train_7754_c_1.nii.gz	train_7754	null
<image><image><image><image><image><image><image><image> Based on visual review of the provided chest CT image, which pulmonary lobe contains the depicted lung nodule? PACS Environment: - Total Slices: 236 - Current Window: lung - Initial View: Global overview (8 representative frames) Options: A. Left Upper Lobe B. ...	[ "images/trajectory_images/v2_localization_train_6522_a_1__nodule_localization_step0_z0_lung.jpg", "images/trajectory_images/v2_localization_train_6522_a_1__nodule_localization_step1_z29_lung.jpg", "images/trajectory_images/v2_localization_train_6522_a_1__nodule_localization_step2_z58_lung.jpg", "images/trajec...	C. Left Lower Lobe	ct_reasoner_v2	localization	train_6522_a_1.nii.gz	train_6522	null
<image><image><image><image><image><image><image><image> Does this chest CT show atelectasis? PACS Environment: - Total Slices: 241 - Current Window: lung - Initial View: Global overview (8 representative frames) Wrap your final answer in <answer>Yes</answer> or <answer>No</answer>.	[ "images/trajectory_images/v2_presence_train_117_a_1__Atelectasis__presence_step0_z0_lung.jpg", "images/trajectory_images/v2_presence_train_117_a_1__Atelectasis__presence_step1_z30_lung.jpg", "images/trajectory_images/v2_presence_train_117_a_1__Atelectasis__presence_step2_z60_lung.jpg", "images/trajectory_imag...	Yes	ct_reasoner_v2	presence	train_117_a_1.nii.gz	train_117	null
<image><image><image><image><image><image><image><image> On visual review of this chest CT image, which pulmonary lobe contains the identified lung nodule? PACS Environment: - Total Slices: 480 - Current Window: lung - Initial View: Global overview (8 representative frames) Options: A. Left Lower Lobe B. Right Lower ...	[ "images/trajectory_images/v2_localization_train_11352_a_2__nodule_localization_step0_z0_lung.jpg", "images/trajectory_images/v2_localization_train_11352_a_2__nodule_localization_step1_z59_lung.jpg", "images/trajectory_images/v2_localization_train_11352_a_2__nodule_localization_step2_z118_lung.jpg", "images/tr...	C. Left Upper Lobe	ct_reasoner_v2	localization	train_11352_a_2.nii.gz	train_11352	null
<image><image><image><image><image><image><image><image> On visual review of this CT image, in which pulmonary lobe is the identified lung nodule located? PACS Environment: - Total Slices: 275 - Current Window: lung - Initial View: Global overview (8 representative frames) Options: A. Left Lower Lobe B. Right Upper L...	[ "images/trajectory_images/v2_localization_train_6390_b_1__nodule_localization_step0_z0_lung.jpg", "images/trajectory_images/v2_localization_train_6390_b_1__nodule_localization_step1_z34_lung.jpg", "images/trajectory_images/v2_localization_train_6390_b_1__nodule_localization_step2_z68_lung.jpg", "images/trajec...	C. Left Upper Lobe	ct_reasoner_v2	localization	train_6390_b_1.nii.gz	train_6390	null
<image><image><image><image><image><image><image><image> Which lung lobe contains the pulmonary nodule visible on this CT image? PACS Environment: - Total Slices: 251 - Current Window: lung - Initial View: Global overview (8 representative frames) Options: A. Right Upper Lobe B. Left Lower Lobe C. Left Upper Lobe D. ...	[ "images/trajectory_images/v2_localization_train_16517_a_1__nodule_localization_step0_z0_lung.jpg", "images/trajectory_images/v2_localization_train_16517_a_1__nodule_localization_step1_z31_lung.jpg", "images/trajectory_images/v2_localization_train_16517_a_1__nodule_localization_step2_z62_lung.jpg", "images/tra...	C. Left Upper Lobe	ct_reasoner_v2	localization	train_16517_a_1.nii.gz	train_16517	null
<image><image><image><image><image><image><image><image> On visual review of this chest CT image, in which pulmonary lobe is the depicted lung nodule located? PACS Environment: - Total Slices: 357 - Current Window: lung - Initial View: Global overview (8 representative frames) Options: A. Right Middle Lobe B. Left Up...	[ "images/trajectory_images/v2_localization_train_8580_a_1__nodule_localization_step0_z0_lung.jpg", "images/trajectory_images/v2_localization_train_8580_a_1__nodule_localization_step1_z44_lung.jpg", "images/trajectory_images/v2_localization_train_8580_a_1__nodule_localization_step2_z88_lung.jpg", "images/trajec...	D. Right Upper Lobe	ct_reasoner_v2	localization	train_8580_a_1.nii.gz	train_8580	null
<image><image><image><image><image><image><image><image> On visual review of this CT image, how would you classify the pleural effusion by size (e.g., small, moderate, or large)? PACS Environment: - Total Slices: 298 - Current Window: lung - Initial View: Global overview (8 representative frames) Options: A. Large B....	[ "images/trajectory_images/v2_measurement_train_13227_b_1__effusion_size_step0_z0_lung.jpg", "images/trajectory_images/v2_measurement_train_13227_b_1__effusion_size_step1_z37_lung.jpg", "images/trajectory_images/v2_measurement_train_13227_b_1__effusion_size_step2_z74_lung.jpg", "images/trajectory_images/v2_mea...	D. Small	ct_reasoner_v2	measurement	train_13227_b_1.nii.gz	train_13227	null
<image><image><image><image><image><image><image><image> Which lung lobe contains the pulmonary nodule visible on this CT image? PACS Environment: - Total Slices: 240 - Current Window: lung - Initial View: Global overview (8 representative frames) Options: A. Left Upper Lobe B. Right Upper Lobe C. Right Lower Lobe D....	[ "images/trajectory_images/v2_localization_train_5237_a_1__nodule_localization_step0_z0_lung.jpg", "images/trajectory_images/v2_localization_train_5237_a_1__nodule_localization_step1_z29_lung.jpg", "images/trajectory_images/v2_localization_train_5237_a_1__nodule_localization_step2_z58_lung.jpg", "images/trajec...	A. Left Upper Lobe	ct_reasoner_v2	localization	train_5237_a_1.nii.gz	train_5237	null
<image><image><image><image><image><image><image><image> On visual review of this CT image, what size category best describes the pleural effusion (e.g., small, moderate, or large)? PACS Environment: - Total Slices: 410 - Current Window: lung - Initial View: Global overview (8 representative frames) Options: A. Moder...	[ "images/trajectory_images/v2_measurement_train_4112_a_2__effusion_size_step0_z0_lung.jpg", "images/trajectory_images/v2_measurement_train_4112_a_2__effusion_size_step1_z51_lung.jpg", "images/trajectory_images/v2_measurement_train_4112_a_2__effusion_size_step2_z102_lung.jpg", "images/trajectory_images/v2_measu...	D. Small	ct_reasoner_v2	measurement	train_4112_a_2.nii.gz	train_4112	null
<image><image><image><image><image><image><image><image> Is there evidence of hiatal hernia on this CT scan? PACS Environment: - Total Slices: 514 - Current Window: lung - Initial View: Global overview (8 representative frames) Wrap your final answer in <answer>Yes</answer> or <answer>No</answer>.	[ "images/trajectory_images/v2_presence_train_18118_a_2__Hiatal_hernia__presence_step0_z0_lung.jpg", "images/trajectory_images/v2_presence_train_18118_a_2__Hiatal_hernia__presence_step1_z64_lung.jpg", "images/trajectory_images/v2_presence_train_18118_a_2__Hiatal_hernia__presence_step2_z128_lung.jpg", "images/tr...	Yes	ct_reasoner_v2	presence	train_18118_a_2.nii.gz	train_18118	null
<image><image><image><image><image><image><image><image> Does this chest CT show pericardial effusion? PACS Environment: - Total Slices: 509 - Current Window: lung - Initial View: Global overview (8 representative frames) Wrap your final answer in <answer>Yes</answer> or <answer>No</answer>.	[ "images/trajectory_images/v2_presence_train_412_a_2__Pericardial_effusion__presence_step0_z0_lung.jpg", "images/trajectory_images/v2_presence_train_412_a_2__Pericardial_effusion__presence_step1_z63_lung.jpg", "images/trajectory_images/v2_presence_train_412_a_2__Pericardial_effusion__presence_step2_z126_lung.jpg...	Yes	ct_reasoner_v2	presence	train_412_a_2.nii.gz	train_412	null
<image><image><image><image><image><image><image><image> Which term best characterizes the radiologic interval change of the posterior right chest wall subcutaneous surgical-site mass on follow-up CT? PACS Environment: - Total Slices: 288 - Current Window: lung - Initial View: Global overview (8 representative frames)...	[ "images/trajectory_images/v2_ChangeClass_train_18521_b_1_vs_train_18521_a_2_Soft_tissue_mass_in__step0_z0_lung.jpg", "images/trajectory_images/v2_ChangeClass_train_18521_b_1_vs_train_18521_a_2_Soft_tissue_mass_in__step1_z35_lung.jpg", "images/trajectory_images/v2_ChangeClass_train_18521_b_1_vs_train_18521_a_2_S...	C. Enlargement	ct_reasoner_v2	ChangeClass	train_18521_b_1.nii.gz	train_18521	train_18521_a_2.nii.gz
<image><image><image><image><image><image><image><image> Does this chest CT show lung nodule? PACS Environment: - Total Slices: 234 - Current Window: lung - Initial View: Global overview (8 representative frames) Wrap your final answer in <answer>Yes</answer> or <answer>No</answer>.	[ "images/trajectory_images/v2_presence_train_10666_a_1__Lung_nodule__presence_step0_z0_lung.jpg", "images/trajectory_images/v2_presence_train_10666_a_1__Lung_nodule__presence_step1_z29_lung.jpg", "images/trajectory_images/v2_presence_train_10666_a_1__Lung_nodule__presence_step2_z58_lung.jpg", "images/trajector...	No	ct_reasoner_v2	presence	train_10666_a_1.nii.gz	train_10666	null
<image><image><image><image><image><image><image><image> Does this CT demonstrate pleural effusion? PACS Environment: - Total Slices: 223 - Current Window: lung - Initial View: Global overview (8 representative frames) Wrap your final answer in <answer>Yes</answer> or <answer>No</answer>.	[ "images/trajectory_images/v2_presence_train_17786_a_1__Pleural_effusion__presence_step0_z0_lung.jpg", "images/trajectory_images/v2_presence_train_17786_a_1__Pleural_effusion__presence_step1_z27_lung.jpg", "images/trajectory_images/v2_presence_train_17786_a_1__Pleural_effusion__presence_step2_z54_lung.jpg", "i...	Yes	ct_reasoner_v2	presence	train_17786_a_1.nii.gz	train_17786	null
<image><image><image><image><image><image><image><image> Does this CT demonstrate lung nodule? PACS Environment: - Total Slices: 461 - Current Window: lung - Initial View: Global overview (8 representative frames) Wrap your final answer in <answer>Yes</answer> or <answer>No</answer>.	[ "images/trajectory_images/v2_presence_train_7795_a_2__Lung_nodule__presence_step0_z0_lung.jpg", "images/trajectory_images/v2_presence_train_7795_a_2__Lung_nodule__presence_step1_z57_lung.jpg", "images/trajectory_images/v2_presence_train_7795_a_2__Lung_nodule__presence_step2_z114_lung.jpg", "images/trajectory_...	Yes	ct_reasoner_v2	presence	train_7795_a_2.nii.gz	train_7795	null
<image><image><image><image><image><image><image><image> On visual review of this chest CT image, in which pulmonary lobe is the depicted nodule located? PACS Environment: - Total Slices: 471 - Current Window: lung - Initial View: Global overview (8 representative frames) Options: A. Left Lower Lobe B. Right Middle L...	[ "images/trajectory_images/v2_localization_train_1296_a_2__nodule_localization_step0_z0_lung.jpg", "images/trajectory_images/v2_localization_train_1296_a_2__nodule_localization_step1_z58_lung.jpg", "images/trajectory_images/v2_localization_train_1296_a_2__nodule_localization_step2_z116_lung.jpg", "images/traje...	A. Left Lower Lobe	ct_reasoner_v2	localization	train_1296_a_2.nii.gz	train_1296	null
<image><image><image><image><image><image><image><image> Does this chest CT show lung opacity? PACS Environment: - Total Slices: 235 - Current Window: lung - Initial View: Global overview (8 representative frames) Wrap your final answer in <answer>Yes</answer> or <answer>No</answer>.	[ "images/trajectory_images/v2_presence_train_661_a_2__Lung_opacity__presence_step0_z0_lung.jpg", "images/trajectory_images/v2_presence_train_661_a_2__Lung_opacity__presence_step1_z29_lung.jpg", "images/trajectory_images/v2_presence_train_661_a_2__Lung_opacity__presence_step2_z58_lung.jpg", "images/trajectory_i...	No	ct_reasoner_v2	presence	train_661_a_2.nii.gz	train_661	null
<image><image><image><image><image><image><image><image> On serial CT review of the two examinations separated by 261 days, how would you categorize the interval change in the distribution of airway abnormality in the lungs? PACS Environment: - Total Slices: 519 - Current Window: lung - Initial View: Global overview (...	[ "images/trajectory_images/v2_ChangeClass_train_7245_b_2_vs_train_7245_a_1_Bronchiectasis_now_p_step0_z0_lung.jpg", "images/trajectory_images/v2_ChangeClass_train_7245_b_2_vs_train_7245_a_1_Bronchiectasis_now_p_step1_z64_lung.jpg", "images/trajectory_images/v2_ChangeClass_train_7245_b_2_vs_train_7245_a_1_Bronchi...	A. Enlargement	ct_reasoner_v2	ChangeClass	train_7245_b_2.nii.gz	train_7245	train_7245_a_1.nii.gz
<image><image><image><image><image><image><image><image> Does this chest CT show pericardial effusion? PACS Environment: - Total Slices: 246 - Current Window: lung - Initial View: Global overview (8 representative frames) Wrap your final answer in <answer>Yes</answer> or <answer>No</answer>.	[ "images/trajectory_images/v2_presence_train_10658_a_1__Pericardial_effusion__presence_step0_z0_lung.jpg", "images/trajectory_images/v2_presence_train_10658_a_1__Pericardial_effusion__presence_step1_z30_lung.jpg", "images/trajectory_images/v2_presence_train_10658_a_1__Pericardial_effusion__presence_step2_z60_lun...	No	ct_reasoner_v2	presence	train_10658_a_1.nii.gz	train_10658	null
<image><image><image><image><image><image><image><image> On visual review of this chest CT image, in which lung and which lobe/segment is the pulmonary nodule situated? PACS Environment: - Total Slices: 248 - Current Window: lung - Initial View: Global overview (8 representative frames) Options: A. Right Lower Lobe B...	[ "images/trajectory_images/v2_localization_train_6835_a_1__nodule_localization_step0_z0_lung.jpg", "images/trajectory_images/v2_localization_train_6835_a_1__nodule_localization_step1_z30_lung.jpg", "images/trajectory_images/v2_localization_train_6835_a_1__nodule_localization_step2_z60_lung.jpg", "images/trajec...	C. Left Lower Lobe	ct_reasoner_v2	localization	train_6835_a_1.nii.gz	train_6835	null
<image><image><image><image><image><image><image><image> Does the CT reveal lung nodule? PACS Environment: - Total Slices: 211 - Current Window: lung - Initial View: Global overview (8 representative frames) Wrap your final answer in <answer>Yes</answer> or <answer>No</answer>.	[ "images/trajectory_images/v2_presence_train_19514_a_1__Lung_nodule__presence_step0_z0_lung.jpg", "images/trajectory_images/v2_presence_train_19514_a_1__Lung_nodule__presence_step1_z26_lung.jpg", "images/trajectory_images/v2_presence_train_19514_a_1__Lung_nodule__presence_step2_z52_lung.jpg", "images/trajector...	No	ct_reasoner_v2	presence	train_19514_a_1.nii.gz	train_19514	null
<image><image><image><image><image><image><image><image> Over a 11-day (~2-week) interval, is the rate of change observed in the mediastinum on this chest CT clinically expected, or does it suggest an unusually rapid or slow process? PACS Environment: - Total Slices: 268 - Current Window: lung - Initial View: Global o...	[ "images/trajectory_images/v2_RegionReasoning_train_8568_b_1_vs_train_8568_a_1_step0_z0_lung.jpg", "images/trajectory_images/v2_RegionReasoning_train_8568_b_1_vs_train_8568_a_1_step1_z33_lung.jpg", "images/trajectory_images/v2_RegionReasoning_train_8568_b_1_vs_train_8568_a_1_step2_z66_lung.jpg", "images/trajec...	Across 11 days, the only quantified mediastinal change is a marked decrease in the thyroid gland volume from 12.4 to 7.3 cm³ (−5.1 cm³; −41.1%). A ~41% volume reduction over ~2 weeks is faster than expected for most untreated structural processes and is more compatible with a transient/reversible process (e.g., resolvi...	ct_reasoner_v2	RegionReasoning	train_8568_b_1.nii.gz	train_8568	train_8568_a_1.nii.gz
<image><image><image><image><image><image><image><image> Two chest CT examinations obtained 9 days apart are reviewed; which interval change classification best describes the mediastinal lymph nodes? PACS Environment: - Total Slices: 155 - Current Window: lung - Initial View: Global overview (8 representative frames) ...	[ "images/trajectory_images/v2_ChangeClass_train_15435_d_1_vs_train_15435_c_1_Bilateral_peribronch_step0_z0_lung.jpg", "images/trajectory_images/v2_ChangeClass_train_15435_d_1_vs_train_15435_c_1_Bilateral_peribronch_step1_z19_lung.jpg", "images/trajectory_images/v2_ChangeClass_train_15435_d_1_vs_train_15435_c_1_B...	A. Resolution	ct_reasoner_v2	ChangeClass	train_15435_d_1.nii.gz	train_15435	train_15435_c_1.nii.gz
<image><image><image><image><image><image><image><image> Does this chest CT show pericardial effusion? PACS Environment: - Total Slices: 215 - Current Window: lung - Initial View: Global overview (8 representative frames) Wrap your final answer in <answer>Yes</answer> or <answer>No</answer>.	[ "images/trajectory_images/v2_presence_train_17907_a_1__Pericardial_effusion__presence_step0_z0_lung.jpg", "images/trajectory_images/v2_presence_train_17907_a_1__Pericardial_effusion__presence_step1_z26_lung.jpg", "images/trajectory_images/v2_presence_train_17907_a_1__Pericardial_effusion__presence_step2_z52_lun...	Yes	ct_reasoner_v2	presence	train_17907_a_1.nii.gz	train_17907	null
<image><image><image><image><image><image><image><image> How has the pulmonary parenchyma changed on the current CT compared to the prior study? PACS Environment: - Total Slices: 345 - Current Window: lung - Initial View: Global overview (8 representative frames)	[ "images/trajectory_images/v2_RegionReport_train_5044_b_1_vs_train_5044_a_1_step0_z0_lung.jpg", "images/trajectory_images/v2_RegionReport_train_5044_b_1_vs_train_5044_a_1_step1_z43_lung.jpg", "images/trajectory_images/v2_RegionReport_train_5044_b_1_vs_train_5044_a_1_step2_z86_lung.jpg", "images/trajectory_imag...	Compared with the prior CT, there are new passive/linear atelectatic changes (right middle lobe medial and left upper lobe inferior lingular segment) with additional linear pleuroparenchymal fibroatelectatic sequelae in the left lower lobe. Emphysema is now present. The previously described calcified right middle lobe ...	ct_reasoner_v2	RegionReport	train_5044_b_1.nii.gz	train_5044	train_5044_a_1.nii.gz
<image><image><image><image><image><image><image><image> Does this chest CT show bronchiectasis? PACS Environment: - Total Slices: 238 - Current Window: lung - Initial View: Global overview (8 representative frames) Wrap your final answer in <answer>Yes</answer> or <answer>No</answer>.	[ "images/trajectory_images/v2_presence_train_784_f_1__Bronchiectasis__presence_step0_z0_lung.jpg", "images/trajectory_images/v2_presence_train_784_f_1__Bronchiectasis__presence_step1_z29_lung.jpg", "images/trajectory_images/v2_presence_train_784_f_1__Bronchiectasis__presence_step2_z58_lung.jpg", "images/trajec...	Yes	ct_reasoner_v2	presence	train_784_f_1.nii.gz	train_784	null
<image><image><image><image><image><image><image><image> On visual review of the provided chest CT image, which pulmonary lobe contains the depicted lung nodule? PACS Environment: - Total Slices: 377 - Current Window: lung - Initial View: Global overview (8 representative frames) Options: A. Right Middle Lobe B. Left...	[ "images/trajectory_images/v2_localization_train_10817_a_2__nodule_localization_step0_z0_lung.jpg", "images/trajectory_images/v2_localization_train_10817_a_2__nodule_localization_step1_z47_lung.jpg", "images/trajectory_images/v2_localization_train_10817_a_2__nodule_localization_step2_z94_lung.jpg", "images/tra...	C. Right Upper Lobe	ct_reasoner_v2	localization	train_10817_a_2.nii.gz	train_10817	null
<image><image><image><image><image><image><image><image> Does this chest CT show bronchiectasis? PACS Environment: - Total Slices: 172 - Current Window: lung - Initial View: Global overview (8 representative frames) Wrap your final answer in <answer>Yes</answer> or <answer>No</answer>.	[ "images/trajectory_images/v2_presence_train_12525_a_1__Bronchiectasis__presence_step0_z0_lung.jpg", "images/trajectory_images/v2_presence_train_12525_a_1__Bronchiectasis__presence_step1_z21_lung.jpg", "images/trajectory_images/v2_presence_train_12525_a_1__Bronchiectasis__presence_step2_z42_lung.jpg", "images/...	No	ct_reasoner_v2	presence	train_12525_a_1.nii.gz	train_12525	null
<image><image><image><image><image><image><image><image> On visual review of this CT image, in which pulmonary lobe is the identified lung nodule located? PACS Environment: - Total Slices: 487 - Current Window: lung - Initial View: Global overview (8 representative frames) Options: A. Left Lower Lobe B. Right Upper L...	[ "images/trajectory_images/v2_localization_train_3205_b_2__nodule_localization_step0_z0_lung.jpg", "images/trajectory_images/v2_localization_train_3205_b_2__nodule_localization_step1_z60_lung.jpg", "images/trajectory_images/v2_localization_train_3205_b_2__nodule_localization_step2_z120_lung.jpg", "images/traje...	D. Left Upper Lobe	ct_reasoner_v2	localization	train_3205_b_2.nii.gz	train_3205	null
<image><image><image><image><image><image><image><image> Does this chest CT show pericardial effusion? PACS Environment: - Total Slices: 258 - Current Window: lung - Initial View: Global overview (8 representative frames) Wrap your final answer in <answer>Yes</answer> or <answer>No</answer>.	[ "images/trajectory_images/v2_presence_train_3105_a_1__Pericardial_effusion__presence_step0_z0_lung.jpg", "images/trajectory_images/v2_presence_train_3105_a_1__Pericardial_effusion__presence_step1_z32_lung.jpg", "images/trajectory_images/v2_presence_train_3105_a_1__Pericardial_effusion__presence_step2_z64_lung.j...	Yes	ct_reasoner_v2	presence	train_3105_a_1.nii.gz	train_3105	null
<image><image><image><image><image><image><image><image> Based on visual assessment of this CT image, which lung lobe contains the identified pulmonary nodule? PACS Environment: - Total Slices: 261 - Current Window: lung - Initial View: Global overview (8 representative frames) Options: A. Right Middle Lobe B. Left U...	[ "images/trajectory_images/v2_localization_train_5008_a_1__nodule_localization_step0_z0_lung.jpg", "images/trajectory_images/v2_localization_train_5008_a_1__nodule_localization_step1_z32_lung.jpg", "images/trajectory_images/v2_localization_train_5008_a_1__nodule_localization_step2_z64_lung.jpg", "images/trajec...	C. Right Upper Lobe	ct_reasoner_v2	localization	train_5008_a_1.nii.gz	train_5008	null
<image><image><image><image><image><image><image><image> Does this chest CT show pericardial effusion? PACS Environment: - Total Slices: 179 - Current Window: lung - Initial View: Global overview (8 representative frames) Wrap your final answer in <answer>Yes</answer> or <answer>No</answer>.	[ "images/trajectory_images/v2_presence_train_3413_a_1__Pericardial_effusion__presence_step0_z0_lung.jpg", "images/trajectory_images/v2_presence_train_3413_a_1__Pericardial_effusion__presence_step1_z22_lung.jpg", "images/trajectory_images/v2_presence_train_3413_a_1__Pericardial_effusion__presence_step2_z44_lung.j...	Yes	ct_reasoner_v2	presence	train_3413_a_1.nii.gz	train_3413	null
<image><image><image><image><image><image><image><image> On visual review of this chest CT image, in which pulmonary lobe is the depicted lung nodule located? PACS Environment: - Total Slices: 115 - Current Window: lung - Initial View: Global overview (8 representative frames) Options: A. Left Lower Lobe B. Left Uppe...	[ "images/trajectory_images/v2_localization_train_2236_a_2__nodule_localization_step0_z0_lung.jpg", "images/trajectory_images/v2_localization_train_2236_a_2__nodule_localization_step1_z14_lung.jpg", "images/trajectory_images/v2_localization_train_2236_a_2__nodule_localization_step2_z28_lung.jpg", "images/trajec...	B. Left Upper Lobe	ct_reasoner_v2	localization	train_2236_a_2.nii.gz	train_2236	null
<image><image><image><image><image><image><image><image> On visual review of this CT scan, what size category best describes the pleural effusion (e.g., small, moderate, or large)? PACS Environment: - Total Slices: 267 - Current Window: lung - Initial View: Global overview (8 representative frames) Options: A. Small ...	[ "images/trajectory_images/v2_measurement_train_11017_a_2__effusion_size_step0_z0_lung.jpg", "images/trajectory_images/v2_measurement_train_11017_a_2__effusion_size_step1_z33_lung.jpg", "images/trajectory_images/v2_measurement_train_11017_a_2__effusion_size_step2_z66_lung.jpg", "images/trajectory_images/v2_mea...	A. Small	ct_reasoner_v2	measurement	train_11017_a_2.nii.gz	train_11017	null
<image><image><image><image><image><image><image><image> Does this chest CT show pulmonary fibrotic sequela? PACS Environment: - Total Slices: 448 - Current Window: lung - Initial View: Global overview (8 representative frames) Wrap your final answer in <answer>Yes</answer> or <answer>No</answer>.	[ "images/trajectory_images/v2_presence_train_10820_a_2__Pulmonary_fibrotic_sequela__presence_step0_z0_lung.jpg", "images/trajectory_images/v2_presence_train_10820_a_2__Pulmonary_fibrotic_sequela__presence_step1_z55_lung.jpg", "images/trajectory_images/v2_presence_train_10820_a_2__Pulmonary_fibrotic_sequela__pres...	No	ct_reasoner_v2	presence	train_10820_a_2.nii.gz	train_10820	null
<image><image><image><image><image><image><image><image> On serial CT review of the two examinations separated by 7 days, what is the most appropriate interval change classification for the bilateral parenchymal opacities previously described as pneumonic in distribution? PACS Environment: - Total Slices: 221 - Curren...	[ "images/trajectory_images/v2_ChangeClass_train_344_d_1_vs_train_344_c_1_Bilateral_pneumonic__step0_z0_lung.jpg", "images/trajectory_images/v2_ChangeClass_train_344_d_1_vs_train_344_c_1_Bilateral_pneumonic__step1_z27_lung.jpg", "images/trajectory_images/v2_ChangeClass_train_344_d_1_vs_train_344_c_1_Bilateral_pne...	C. Shrinkage	ct_reasoner_v2	ChangeClass	train_344_d_1.nii.gz	train_344	train_344_c_1.nii.gz
<image><image><image><image><image><image><image><image> On visual review of this CT image, what size category (small, moderate, or large) best describes the pleural effusion? PACS Environment: - Total Slices: 230 - Current Window: lung - Initial View: Global overview (8 representative frames) Options: A. Small B. La...	[ "images/trajectory_images/v2_measurement_train_4246_d_1__effusion_size_step0_z0_lung.jpg", "images/trajectory_images/v2_measurement_train_4246_d_1__effusion_size_step1_z28_lung.jpg", "images/trajectory_images/v2_measurement_train_4246_d_1__effusion_size_step2_z56_lung.jpg", "images/trajectory_images/v2_measur...	A. Small	ct_reasoner_v2	measurement	train_4246_d_1.nii.gz	train_4246	null
<image><image><image><image><image><image><image><image> What are the interval changes in the lungs compared to the previous examination? PACS Environment: - Total Slices: 509 - Current Window: lung - Initial View: Global overview (8 representative frames)	[ "images/trajectory_images/v2_RegionReport_train_7122_b_2_vs_train_7122_a_2_step0_z0_lung.jpg", "images/trajectory_images/v2_RegionReport_train_7122_b_2_vs_train_7122_a_2_step1_z63_lung.jpg", "images/trajectory_images/v2_RegionReport_train_7122_b_2_vs_train_7122_a_2_step2_z126_lung.jpg", "images/trajectory_ima...	Compared with the prior exam, the previously described focal ground-glass opacities and centrilobular nodules in the right upper lobe have resolved. Minimal bibasilar bronchiectasis and minimal emphysematous changes are similar, and the right middle lobe linear opacities/architectural distortion with volume loss persis...	ct_reasoner_v2	RegionReport	train_7122_b_2.nii.gz	train_7122	train_7122_a_2.nii.gz
<image><image><image><image><image><image><image><image> On serial CT review of the two examinations separated by 235 days, what is the most appropriate interval change classification for the bilateral lung parenchyma in the peribronchial regions, including the right middle lobe and lower lobes? PACS Environment: - To...	[ "images/trajectory_images/v2_ChangeClass_train_3015_c_1_vs_train_3015_b_1_Bilateral_pleural_ef_step0_z0_lung.jpg", "images/trajectory_images/v2_ChangeClass_train_3015_c_1_vs_train_3015_b_1_Bilateral_pleural_ef_step1_z26_lung.jpg", "images/trajectory_images/v2_ChangeClass_train_3015_c_1_vs_train_3015_b_1_Bilater...	C. New Appearance	ct_reasoner_v2	ChangeClass	train_3015_c_1.nii.gz	train_3015	train_3015_b_1.nii.gz
<image><image><image><image><image><image><image><image> Based on visual review of this CT image, which lung lobe contains the depicted pulmonary nodule? PACS Environment: - Total Slices: 225 - Current Window: lung - Initial View: Global overview (8 representative frames) Options: A. Right Upper Lobe B. Left Lower Lo...	[ "images/trajectory_images/v2_localization_train_1708_d_1__nodule_localization_step0_z0_lung.jpg", "images/trajectory_images/v2_localization_train_1708_d_1__nodule_localization_step1_z28_lung.jpg", "images/trajectory_images/v2_localization_train_1708_d_1__nodule_localization_step2_z56_lung.jpg", "images/trajec...	A. Right Upper Lobe	ct_reasoner_v2	localization	train_1708_d_1.nii.gz	train_1708	null
<image><image><image><image><image><image><image><image> Is coronary artery wall calcification present in this CT scan? PACS Environment: - Total Slices: 204 - Current Window: lung - Initial View: Global overview (8 representative frames) Wrap your final answer in <answer>Yes</answer> or <answer>No</answer>.	[ "images/trajectory_images/v2_presence_train_1468_b_1__Coronary_artery_wall_calcification__presence_step0_z0_lung.jpg", "images/trajectory_images/v2_presence_train_1468_b_1__Coronary_artery_wall_calcification__presence_step1_z25_lung.jpg", "images/trajectory_images/v2_presence_train_1468_b_1__Coronary_artery_wal...	Yes	ct_reasoner_v2	presence	train_1468_b_1.nii.gz	train_1468	null
<image><image><image><image><image><image><image><image> On visual review of this CT, how would you categorize the size of the pleural effusion (e.g., small, moderate, or large)? PACS Environment: - Total Slices: 253 - Current Window: lung - Initial View: Global overview (8 representative frames) Options: A. Moderate...	[ "images/trajectory_images/v2_measurement_train_13041_a_1__effusion_size_step0_z0_lung.jpg", "images/trajectory_images/v2_measurement_train_13041_a_1__effusion_size_step1_z31_lung.jpg", "images/trajectory_images/v2_measurement_train_13041_a_1__effusion_size_step2_z62_lung.jpg", "images/trajectory_images/v2_mea...	D. Small	ct_reasoner_v2	measurement	train_13041_a_1.nii.gz	train_13041	null
<image><image><image><image><image><image><image><image> On serial CT review of the two examinations separated by 71 days, what is the most appropriate interval change classification for the pericardial space? PACS Environment: - Total Slices: 298 - Current Window: lung - Initial View: Global overview (8 representativ...	[ "images/trajectory_images/v2_ChangeClass_train_14698_c_1_vs_train_14698_b_1_Bilateral_lower-lobe_step0_z0_lung.jpg", "images/trajectory_images/v2_ChangeClass_train_14698_c_1_vs_train_14698_b_1_Bilateral_lower-lobe_step1_z37_lung.jpg", "images/trajectory_images/v2_ChangeClass_train_14698_c_1_vs_train_14698_b_1_B...	A. Resolution	ct_reasoner_v2	ChangeClass	train_14698_c_1.nii.gz	train_14698	train_14698_b_1.nii.gz
<image><image><image><image><image><image><image><image> Based on visual review of this CT image, in which pulmonary lobe is the depicted lung nodule located? PACS Environment: - Total Slices: 259 - Current Window: lung - Initial View: Global overview (8 representative frames) Options: A. Right Upper Lobe B. Right Lo...	[ "images/trajectory_images/v2_localization_train_12357_b_1__nodule_localization_step0_z0_lung.jpg", "images/trajectory_images/v2_localization_train_12357_b_1__nodule_localization_step1_z32_lung.jpg", "images/trajectory_images/v2_localization_train_12357_b_1__nodule_localization_step2_z64_lung.jpg", "images/tra...	D. Left Lower Lobe	ct_reasoner_v2	localization	train_12357_b_1.nii.gz	train_12357	null
<image><image><image><image><image><image><image><image> Does this chest CT show lung opacity? PACS Environment: - Total Slices: 271 - Current Window: lung - Initial View: Global overview (8 representative frames) Wrap your final answer in <answer>Yes</answer> or <answer>No</answer>.	[ "images/trajectory_images/v2_presence_train_9572_a_1__Lung_opacity__presence_step0_z0_lung.jpg", "images/trajectory_images/v2_presence_train_9572_a_1__Lung_opacity__presence_step1_z33_lung.jpg", "images/trajectory_images/v2_presence_train_9572_a_1__Lung_opacity__presence_step2_z66_lung.jpg", "images/trajector...	No	ct_reasoner_v2	presence	train_9572_a_1.nii.gz	train_9572	null
<image><image><image><image><image><image><image><image> Over a 6-day interval, is the rate of change observed in the cardiovascular structures on this chest CT clinically expected, or does it suggest an unusually rapid or slow process? PACS Environment: - Total Slices: 310 - Current Window: lung - Initial View: Globa...	[ "images/trajectory_images/v2_RegionReasoning_train_13437_d_2_vs_train_13437_c_1_step0_z0_lung.jpg", "images/trajectory_images/v2_RegionReasoning_train_13437_d_2_vs_train_13437_c_1_step1_z38_lung.jpg", "images/trajectory_images/v2_RegionReasoning_train_13437_d_2_vs_train_13437_c_1_step2_z76_lung.jpg", "images/...	Assessment shows coronary artery wall calcification labeled as "Resolution" over 6 days, implying a near-complete decrease (effectively ~100% reduction) in measured calcification burden. True coronary calcification is a chronic, non-reversible finding and would not be expected to resolve over a 6-day interval; this rat...	ct_reasoner_v2	RegionReasoning	train_13437_d_2.nii.gz	train_13437	train_13437_c_1.nii.gz
<image><image><image><image><image><image><image><image> On visual review of this chest CT image, which pulmonary lobe contains the identified lung nodule? PACS Environment: - Total Slices: 166 - Current Window: lung - Initial View: Global overview (8 representative frames) Options: A. Right Lower Lobe B. Right Upper...	[ "images/trajectory_images/v2_localization_train_16779_a_2__nodule_localization_step0_z0_lung.jpg", "images/trajectory_images/v2_localization_train_16779_a_2__nodule_localization_step1_z20_lung.jpg", "images/trajectory_images/v2_localization_train_16779_a_2__nodule_localization_step2_z40_lung.jpg", "images/tra...	D. Left Upper Lobe	ct_reasoner_v2	localization	train_16779_a_2.nii.gz	train_16779	null
<image><image><image><image><image><image><image><image> On visual review of this chest CT image, in which lung and which lobe/segment is the pulmonary nodule located? PACS Environment: - Total Slices: 220 - Current Window: lung - Initial View: Global overview (8 representative frames) Options: A. Right Upper Lobe B....	[ "images/trajectory_images/v2_localization_train_14927_a_1__nodule_localization_step0_z0_lung.jpg", "images/trajectory_images/v2_localization_train_14927_a_1__nodule_localization_step1_z27_lung.jpg", "images/trajectory_images/v2_localization_train_14927_a_1__nodule_localization_step2_z54_lung.jpg", "images/tra...	D. Right Middle Lobe	ct_reasoner_v2	localization	train_14927_a_1.nii.gz	train_14927	null
<image><image><image><image><image><image><image><image> Does the CT reveal atelectasis? PACS Environment: - Total Slices: 219 - Current Window: lung - Initial View: Global overview (8 representative frames) Wrap your final answer in <answer>Yes</answer> or <answer>No</answer>.	[ "images/trajectory_images/v2_presence_train_9500_a_1__Atelectasis__presence_step0_z0_lung.jpg", "images/trajectory_images/v2_presence_train_9500_a_1__Atelectasis__presence_step1_z27_lung.jpg", "images/trajectory_images/v2_presence_train_9500_a_1__Atelectasis__presence_step2_z54_lung.jpg", "images/trajectory_i...	No	ct_reasoner_v2	presence	train_9500_a_1.nii.gz	train_9500	null
<image><image><image><image><image><image><image><image> On serial CT review of the two examinations separated by 59 days, what is the most appropriate interval change classification for the upper abdominal peritoneal spaces around the gallbladder and spleen, including the adjacent mesenteric planes? PACS Environment:...	[ "images/trajectory_images/v2_ChangeClass_train_17956_b_2_vs_train_17956_a_2_Pericholecystic_and__step0_z0_lung.jpg", "images/trajectory_images/v2_ChangeClass_train_17956_b_2_vs_train_17956_a_2_Pericholecystic_and__step1_z63_lung.jpg", "images/trajectory_images/v2_ChangeClass_train_17956_b_2_vs_train_17956_a_2_P...	A. New Appearance	ct_reasoner_v2	ChangeClass	train_17956_b_2.nii.gz	train_17956	train_17956_a_2.nii.gz
<image><image><image><image><image><image><image><image> What interval changes are observed in the mediastinum compared to the previous examination? PACS Environment: - Total Slices: 509 - Current Window: lung - Initial View: Global overview (8 representative frames)	[ "images/trajectory_images/v2_RegionReport_train_16672_d_2_vs_train_16672_c_2_step0_z0_lung.jpg", "images/trajectory_images/v2_RegionReport_train_16672_d_2_vs_train_16672_c_2_step1_z63_lung.jpg", "images/trajectory_images/v2_RegionReport_train_16672_d_2_vs_train_16672_c_2_step2_z126_lung.jpg", "images/trajecto...	Compared with the prior exam, mediastinal/hilar lymphadenopathy has resolved on mask analysis. The prior study described stable calcified millimetric paratracheal lymph nodes without pathologic enlargement, whereas the current noncontrast exam reports no pathologically enlarged mediastinal or hilar lymph nodes and norm...	ct_reasoner_v2	RegionReport	train_16672_d_2.nii.gz	train_16672	train_16672_c_2.nii.gz
<image><image><image><image><image><image><image><image> Based on visual assessment of this CT image, in which pulmonary lobe is the depicted lung nodule located? PACS Environment: - Total Slices: 229 - Current Window: lung - Initial View: Global overview (8 representative frames) Options: A. Left Lower Lobe B. Right...	[ "images/trajectory_images/v2_localization_train_15987_a_1__nodule_localization_step0_z0_lung.jpg", "images/trajectory_images/v2_localization_train_15987_a_1__nodule_localization_step1_z28_lung.jpg", "images/trajectory_images/v2_localization_train_15987_a_1__nodule_localization_step2_z56_lung.jpg", "images/tra...	C. Left Upper Lobe	ct_reasoner_v2	localization	train_15987_a_1.nii.gz	train_15987	null
<image><image><image><image><image><image><image><image> The interval appearance of the right lower lobe consolidation/ground-glass pattern on serial CT is most consistent with which category of change? PACS Environment: - Total Slices: 418 - Current Window: lung - Initial View: Global overview (8 representative frame...	[ "images/trajectory_images/v2_ChangeClass_train_9320_g_2_vs_train_9320_f_2_Right_lower_lobe_pne_step0_z0_lung.jpg", "images/trajectory_images/v2_ChangeClass_train_9320_g_2_vs_train_9320_f_2_Right_lower_lobe_pne_step1_z52_lung.jpg", "images/trajectory_images/v2_ChangeClass_train_9320_g_2_vs_train_9320_f_2_Right_l...	B. Enlargement	ct_reasoner_v2	ChangeClass	train_9320_g_2.nii.gz	train_9320	train_9320_f_2.nii.gz
<image><image><image><image><image><image><image><image> On visual review of the provided CT image, in which pulmonary lobe is the depicted lung nodule located? PACS Environment: - Total Slices: 238 - Current Window: lung - Initial View: Global overview (8 representative frames) Options: A. Right Middle Lobe B. Left ...	[ "images/trajectory_images/v2_localization_train_5117_d_1__nodule_localization_step0_z0_lung.jpg", "images/trajectory_images/v2_localization_train_5117_d_1__nodule_localization_step1_z29_lung.jpg", "images/trajectory_images/v2_localization_train_5117_d_1__nodule_localization_step2_z58_lung.jpg", "images/trajec...	C. Right Upper Lobe	ct_reasoner_v2	localization	train_5117_d_1.nii.gz	train_5117	null
<image><image><image><image><image><image><image><image> What interval changes are observed in the mediastinum compared to the previous examination? PACS Environment: - Total Slices: 475 - Current Window: lung - Initial View: Global overview (8 representative frames)	[ "images/trajectory_images/v2_RegionReport_train_10174_b_2_vs_train_10174_a_1_step0_z0_lung.jpg", "images/trajectory_images/v2_RegionReport_train_10174_b_2_vs_train_10174_a_1_step1_z59_lung.jpg", "images/trajectory_images/v2_RegionReport_train_10174_b_2_vs_train_10174_a_1_step2_z118_lung.jpg", "images/trajecto...	Compared with the prior exam 124 days earlier, the thyroid gland volume has markedly decreased (11.7 → 4.0 cm³; -65.7%). Anterior mediastinal thymic soft tissue persists. Mediastinal lymph nodes have increased in size/appearance: previously small stable nodes up to 5 mm are now described as fusiform nodes with the larg...	ct_reasoner_v2	RegionReport	train_10174_b_2.nii.gz	train_10174	train_10174_a_1.nii.gz
<image><image><image><image><image><image><image><image> What are the interval changes in the lungs compared to the previous examination? PACS Environment: - Total Slices: 408 - Current Window: lung - Initial View: Global overview (8 representative frames)	[ "images/trajectory_images/v2_RegionReport_train_8749_c_2_vs_train_8749_b_2_step0_z0_lung.jpg", "images/trajectory_images/v2_RegionReport_train_8749_c_2_vs_train_8749_b_2_step1_z50_lung.jpg", "images/trajectory_images/v2_RegionReport_train_8749_c_2_vs_train_8749_b_2_step2_z100_lung.jpg", "images/trajectory_ima...	Compared with the prior exam, there is no new airspace consolidation, infiltrate, or mass. Two small right upper lobe anterior segment nodules are stable to minimally larger, now measuring up to 2.5 mm (previously 2 mm). Lung volumes are increased on the current study, most notably in the left lower lobe (704.0→885.9 c...	ct_reasoner_v2	RegionReport	train_8749_c_2.nii.gz	train_8749	train_8749_b_2.nii.gz
<image><image><image><image><image><image><image><image> Considering the CT studies obtained 3 days apart, how should the interval change in left hemithorax subcutaneous emphysema be categorized? PACS Environment: - Total Slices: 284 - Current Window: lung - Initial View: Global overview (8 representative frames) - Pr...	[ "images/trajectory_images/v2_ChangeClass_train_44_b_1_vs_train_44_a_1_Left_hemithorax_subc_step0_z0_lung.jpg", "images/trajectory_images/v2_ChangeClass_train_44_b_1_vs_train_44_a_1_Left_hemithorax_subc_step1_z35_lung.jpg", "images/trajectory_images/v2_ChangeClass_train_44_b_1_vs_train_44_a_1_Left_hemithorax_sub...	C. Shrinkage	ct_reasoner_v2	ChangeClass	train_44_b_1.nii.gz	train_44	train_44_a_1.nii.gz
<image><image><image><image><image><image><image><image> What pulmonary changes are identified on interval comparison? PACS Environment: - Total Slices: 461 - Current Window: lung - Initial View: Global overview (8 representative frames)	[ "images/trajectory_images/v2_RegionReport_train_17759_c_2_vs_train_17759_b_2_step0_z0_lung.jpg", "images/trajectory_images/v2_RegionReport_train_17759_c_2_vs_train_17759_b_2_step1_z57_lung.jpg", "images/trajectory_images/v2_RegionReport_train_17759_c_2_vs_train_17759_b_2_step2_z114_lung.jpg", "images/trajecto...	Interval development of apical emphysematous change and peribronchial thickening (new on mask and described on current report). Mild increase in right lower-zone ground-glass opacity is described. Previously seen left lower lobe superior-segment consolidation has significantly regressed. A left lower lobe laterobasal n...	ct_reasoner_v2	RegionReport	train_17759_c_2.nii.gz	train_17759	train_17759_b_2.nii.gz
<image><image><image><image><image><image><image><image> When reviewing the two CT examinations separated by 7 days, what is the most appropriate interval change classification for the right pleural space? PACS Environment: - Total Slices: 398 - Current Window: lung - Initial View: Global overview (8 representative fr...	[ "images/trajectory_images/v2_ChangeClass_train_11315_f_2_vs_train_11315_e_2_Bilateral_pulmonary__step0_z0_lung.jpg", "images/trajectory_images/v2_ChangeClass_train_11315_f_2_vs_train_11315_e_2_Bilateral_pulmonary__step1_z49_lung.jpg", "images/trajectory_images/v2_ChangeClass_train_11315_f_2_vs_train_11315_e_2_B...	D. New Appearance	ct_reasoner_v2	ChangeClass	train_11315_f_2.nii.gz	train_11315	train_11315_e_2.nii.gz
<image><image><image><image><image><image><image><image> Does this chest CT show emphysema? PACS Environment: - Total Slices: 457 - Current Window: lung - Initial View: Global overview (8 representative frames) Wrap your final answer in <answer>Yes</answer> or <answer>No</answer>.	[ "images/trajectory_images/v2_presence_train_16717_a_5__Emphysema__presence_step0_z0_lung.jpg", "images/trajectory_images/v2_presence_train_16717_a_5__Emphysema__presence_step1_z57_lung.jpg", "images/trajectory_images/v2_presence_train_16717_a_5__Emphysema__presence_step2_z114_lung.jpg", "images/trajectory_ima...	No	ct_reasoner_v2	presence	train_16717_a_5.nii.gz	train_16717	null
<image><image><image><image><image><image><image><image> Focusing on the posterobasal segments of both lower lobes, what is the interval change classification for the consolidation and ground-glass opacities between the two CT exams? PACS Environment: - Total Slices: 207 - Current Window: lung - Initial View: Global o...	[ "images/trajectory_images/v2_ChangeClass_train_7737_b_1_vs_train_7737_a_1_Consolidation_and_gr_step0_z0_lung.jpg", "images/trajectory_images/v2_ChangeClass_train_7737_b_1_vs_train_7737_a_1_Consolidation_and_gr_step1_z25_lung.jpg", "images/trajectory_images/v2_ChangeClass_train_7737_b_1_vs_train_7737_a_1_Consoli...	B. Enlargement	ct_reasoner_v2	ChangeClass	train_7737_b_1.nii.gz	train_7737	train_7737_a_1.nii.gz
<image><image><image><image><image><image><image><image> What interval changes are observed in the cardiac structures compared to the prior examination? PACS Environment: - Total Slices: 457 - Current Window: lung - Initial View: Global overview (8 representative frames)	[ "images/trajectory_images/v2_RegionReport_train_19024_c_2_vs_train_19024_b_2_step0_z0_lung.jpg", "images/trajectory_images/v2_RegionReport_train_19024_c_2_vs_train_19024_b_2_step1_z57_lung.jpg", "images/trajectory_images/v2_RegionReport_train_19024_c_2_vs_train_19024_b_2_step2_z114_lung.jpg", "images/trajecto...	Compared with the prior exam, coronary artery wall calcification cannot be assessed on the current study due to resolution limitations. Previously described cardiomegaly, minimal pericardial effusion, and atherosclerotic changes of the aorta/coronary arteries are not otherwise quantified in the provided current data.	ct_reasoner_v2	RegionReport	train_19024_c_2.nii.gz	train_19024	train_19024_b_2.nii.gz
<image><image><image><image><image><image><image><image> Does this CT demonstrate emphysema? PACS Environment: - Total Slices: 426 - Current Window: lung - Initial View: Global overview (8 representative frames) Wrap your final answer in <answer>Yes</answer> or <answer>No</answer>.	[ "images/trajectory_images/v2_presence_train_19557_a_2__Emphysema__presence_step0_z0_lung.jpg", "images/trajectory_images/v2_presence_train_19557_a_2__Emphysema__presence_step1_z53_lung.jpg", "images/trajectory_images/v2_presence_train_19557_a_2__Emphysema__presence_step2_z106_lung.jpg", "images/trajectory_ima...	Yes	ct_reasoner_v2	presence	train_19557_a_2.nii.gz	train_19557	null
<image><image><image><image><image><image><image><image> On visual review of this CT image, what size category best describes the pleural effusion present? PACS Environment: - Total Slices: 260 - Current Window: lung - Initial View: Global overview (8 representative frames) Options: A. Large B. Trace C. Moderate D. S...	[ "images/trajectory_images/v2_measurement_train_2108_a_2__effusion_size_step0_z0_lung.jpg", "images/trajectory_images/v2_measurement_train_2108_a_2__effusion_size_step1_z32_lung.jpg", "images/trajectory_images/v2_measurement_train_2108_a_2__effusion_size_step2_z64_lung.jpg", "images/trajectory_images/v2_measur...	B. Trace	ct_reasoner_v2	measurement	train_2108_a_2.nii.gz	train_2108	null
<image><image><image><image><image><image><image><image> On serial CT review of the two examinations separated by 189 days, what is the most appropriate interval change classification for the subpleural abnormalities in the superior segment of the left lower lobe? PACS Environment: - Total Slices: 295 - Current Window...	[ "images/trajectory_images/v2_ChangeClass_train_790_b_1_vs_train_790_a_1_Two_subpleural_milli_step0_z0_lung.jpg", "images/trajectory_images/v2_ChangeClass_train_790_b_1_vs_train_790_a_1_Two_subpleural_milli_step1_z36_lung.jpg", "images/trajectory_images/v2_ChangeClass_train_790_b_1_vs_train_790_a_1_Two_subpleura...	B. New Appearance	ct_reasoner_v2	ChangeClass	train_790_b_1.nii.gz	train_790	train_790_a_1.nii.gz
<image><image><image><image><image><image><image><image> On visual review of this CT image, in which pulmonary lobe is the depicted lung nodule located? PACS Environment: - Total Slices: 235 - Current Window: lung - Initial View: Global overview (8 representative frames) Options: A. Left Upper Lobe B. Left Lower Lobe...	[ "images/trajectory_images/v2_localization_train_1364_b_1__nodule_localization_step0_z0_lung.jpg", "images/trajectory_images/v2_localization_train_1364_b_1__nodule_localization_step1_z29_lung.jpg", "images/trajectory_images/v2_localization_train_1364_b_1__nodule_localization_step2_z58_lung.jpg", "images/trajec...	B. Left Lower Lobe	ct_reasoner_v2	localization	train_1364_b_1.nii.gz	train_1364	null
<image><image><image><image><image><image><image><image> On visual review of this CT image, in which lung and which lobe/segment is the pulmonary nodule located? PACS Environment: - Total Slices: 520 - Current Window: lung - Initial View: Global overview (8 representative frames) Options: A. Left Upper Lobe B. Right ...	[ "images/trajectory_images/v2_localization_train_14631_a_2__nodule_localization_step0_z0_lung.jpg", "images/trajectory_images/v2_localization_train_14631_a_2__nodule_localization_step1_z64_lung.jpg", "images/trajectory_images/v2_localization_train_14631_a_2__nodule_localization_step2_z128_lung.jpg", "images/tr...	D. Left Lower Lobe	ct_reasoner_v2	localization	train_14631_a_2.nii.gz	train_14631	null
<image><image><image><image><image><image><image><image> What interval changes are observed in the mediastinum compared to the previous examination? PACS Environment: - Total Slices: 275 - Current Window: lung - Initial View: Global overview (8 representative frames)	[ "images/trajectory_images/v2_RegionReport_train_12012_d_1_vs_train_12012_c_1_step0_z0_lung.jpg", "images/trajectory_images/v2_RegionReport_train_12012_d_1_vs_train_12012_c_1_step1_z34_lung.jpg", "images/trajectory_images/v2_RegionReport_train_12012_d_1_vs_train_12012_c_1_step2_z68_lung.jpg", "images/trajector...	Mediastinal main vascular structures and heart size/contour remain normal, and the thoracic esophagus remains normal in caliber without significant wall thickening. No pathologically enlarged mediastinal or hilar/axillary lymph nodes are identified on the current exam. Quantitatively, the thyroid gland volume has decre...	ct_reasoner_v2	RegionReport	train_12012_d_1.nii.gz	train_12012	train_12012_c_1.nii.gz
<image><image><image><image><image><image><image><image> Which lung lobe contains the pulmonary nodule visible on this CT image? PACS Environment: - Total Slices: 102 - Current Window: lung - Initial View: Global overview (8 representative frames) Options: A. Right Lower Lobe B. Left Upper Lobe C. Left Lower Lobe D. ...	[ "images/trajectory_images/v2_localization_train_16148_j_2__nodule_localization_step0_z0_lung.jpg", "images/trajectory_images/v2_localization_train_16148_j_2__nodule_localization_step1_z12_lung.jpg", "images/trajectory_images/v2_localization_train_16148_j_2__nodule_localization_step2_z24_lung.jpg", "images/tra...	C. Left Lower Lobe	ct_reasoner_v2	localization	train_16148_j_2.nii.gz	train_16148	null
<image><image><image><image><image><image><image><image> On visual review of this CT, how would you classify the size of the pleural effusion (e.g., small, moderate, or large)? PACS Environment: - Total Slices: 334 - Current Window: lung - Initial View: Global overview (8 representative frames) Options: A. Trace B. L...	[ "images/trajectory_images/v2_measurement_train_9055_a_1__effusion_size_step0_z0_lung.jpg", "images/trajectory_images/v2_measurement_train_9055_a_1__effusion_size_step1_z41_lung.jpg", "images/trajectory_images/v2_measurement_train_9055_a_1__effusion_size_step2_z82_lung.jpg", "images/trajectory_images/v2_measur...	A. Trace	ct_reasoner_v2	measurement	train_9055_a_1.nii.gz	train_9055	null
<image><image><image><image><image><image><image><image> On visual review of this chest CT image, in which lung and which lobe is the pulmonary nodule located? PACS Environment: - Total Slices: 108 - Current Window: lung - Initial View: Global overview (8 representative frames) Options: A. Left Lower Lobe B. Right Mi...	[ "images/trajectory_images/v2_localization_train_525_a_2__nodule_localization_step0_z0_lung.jpg", "images/trajectory_images/v2_localization_train_525_a_2__nodule_localization_step1_z13_lung.jpg", "images/trajectory_images/v2_localization_train_525_a_2__nodule_localization_step2_z26_lung.jpg", "images/trajector...	C. Left Upper Lobe	ct_reasoner_v2	localization	train_525_a_2.nii.gz	train_525	null
<image><image><image><image><image><image><image><image> Describe the vascular findings and their changes since the prior CT. PACS Environment: - Total Slices: 446 - Current Window: lung - Initial View: Global overview (8 representative frames)	[ "images/trajectory_images/v2_RegionReport_train_17801_b_2_vs_train_17801_a_2_step0_z0_lung.jpg", "images/trajectory_images/v2_RegionReport_train_17801_b_2_vs_train_17801_a_2_step1_z55_lung.jpg", "images/trajectory_images/v2_RegionReport_train_17801_b_2_vs_train_17801_a_2_step2_z110_lung.jpg", "images/trajecto...	Thoracic vasculature: The thoracic aorta volume measures 81.8 cm³, decreased from 104.5 cm³ on the prior study (-21.8%). Mediastinal vascular structures are described as having a natural appearance on the current noncontrast exam, though evaluation is limited by lack of contrast; previously, the mediastinal main vascul...	ct_reasoner_v2	RegionReport	train_17801_b_2.nii.gz	train_17801	train_17801_a_2.nii.gz

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ACTOR RL samples

GRPO training samples for ACTOR (EMNLP 2026).

Code: https://github.com/qianxingyucode/ACTOR

Regenerate the observations

Same as the SFT set: paths are relative, pixels are not included, and rollouts render on the fly from CT-RATE volumes through the vendored PACS simulator.

Access and redistribution

Every image behind this release comes from CT-RATE, which is gated and whose Terms and Conditions section 5 state:

Redistribution of the dataset or any portion thereof is not allowed.

A rendered axial slice is a portion of that dataset, so this repository contains no CT volumes and no rendered slices — only text, annotations and the render manifest needed to regenerate the pixels yourself. Accept the CT-RATE terms, download the volumes, then run the deterministic renderer from ACTOR.

Rendering is deterministic: regenerated observations are byte-identical to the ones we trained and evaluated on.

Licence

Released under CC BY-NC-SA 4.0 — non-commercial use only, share-alike, attribution required. This is inherited from CT-RATE and is not a choice we can relax. The ACTOR code is Apache-2.0; this licence covers the data only.

Not for clinical use

Research artefact only. It has not been validated for diagnosis, and must not inform patient care.

Citation

@inproceedings{actor2026,
  title     = {ACTOR: Agentic CT Reasoning with Radiologist-Aligned Actions},
  booktitle = {Proceedings of EMNLP},
  year      = {2026}
}

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