mosaic-intelligence/README.md

metadata

name: OpenH-RF — Mosaic Intelligence / NuevoSono IVUS
license: cc-by-4.0
task_categories:
  - image-segmentation
tags:
  - ultrasound
  - rf
  - openh-rf
  - IVUS
  - tracked-ultrasound

Data Card — Mosaic Intelligence / NuevoSono in-vivo IVUS

This data card consists of a collection of in-vivo intravascular ultrasound (IVUS) acquisitions from a porcine study. Each acquisition is saved in the zea file format. The general dataset sections below (contributors, license, characterization, etc.) apply to all acquisitions, with individual subsections detailing each dataset's specific dimensions and which optional groups are present.

There are 9 acquisitions in total:

Group 1: 15_* acquisitions (untracked, counterclockwise rotation):

• 15_10_18_21
• 15_10_50_19
• 15_16_45_06

Group 2: 22_* acquisitions (tracked, linear encoder pullback, clockwise rotation):

• 22_12_10_52
• 22_12_29_46
• 22_12_38_45
• 22_13_10_16
• 22_13_56_43
• 22_14_29_54

Dataset Description

Each dataset is an IVUS acquisition collected in a porcine animal study. The source data consists of raw IVUS RF frames and a pre-computed (scan-converted) B-mode image. Six of the acquisitions have time-sampled linear encoder pullback positions of the IVUS probe at each frame. For each acquisition and for every frame, per-class segmentation masks are provided for the vessel lumen, intima-media, and guidewire.

Dataset Contributors

Mosaic Intelligence Labs in collaboration with NuevoSono

Primary points of contact: Brian Boitnott (1): brian@mosaicintelligence.xyz Ali Mackanic (1): ali@mosaicintelligence.xyz

Dataset Creation Date

07/17/2026

License / Terms of Use

All contributed data, labels, and metadata is released by Mosaic Intelligence Labs and NuevoSono under CC BY 4.0. Pre-existing hardware, software, simulation, and platform intellectual property remain the property of their respective owners. The team agrees to comply with OpenH-RF governance, publication, and data-sharing policies. The license is also recorded in each file's metadata/credit field.

Intended Usage

Intended for IVUS tracking and segmentation applications, including lesion detection and image-guided intervention.

Dataset Characterization

• Data Collection Method: Porcine (in-vivo animal study)
• Labeling Method: derived tracking metadata, semi-automated labeling
• Acquisition System: Single-element IVUS, center frequency 30 MHz, sampling rate 1 GHz

Dataset Format

All acquisitions are submitted in the zea file format. The RF data is stored as a rotational sequence of A-lines (n_tx transmits per frame, one element/channel); the accompanying B-mode image and segmentation masks are pre-computed, scan-converted Cartesian frames sharing a per-pixel coordinate grid.

Shared per-sample schema

Fields that are in every acquisition:

Group / field	Shape	Dtype	Units	Description
data/raw_data	[n_frames, n_tx, n_ax, 1, 1]	float32	source RF units	Raw IVUS RF frames (single element / channel)
data/image/values	[n_frames, H, W]	uint8	—	Pre-computed (scan-converted) B-mode image
data/image/coordinates	[H, W, 3]	float32	m	Per-pixel Cartesian positions (x, y, z); cross-section lies in the x-y plane, z = 0
data/segmentation/values	[n_frames, H, W, n_labels]	bool	—	Per-class boolean segmentation masks (one channel per label)
data/segmentation/coordinates	[H, W, 3]	float32	m	Same per-pixel grid as image/coordinates
data/segmentation/labels	[n_labels]	str	—	Channel names: background, lumen, intima_media, guidewire
scan/*	—	mixed	Hz / s / rad / m	Scan metadata (sampling_frequency, center_frequency, demodulation_frequency, polar_angles, t0_delays, tx_apodizations, focus_distances, transmit_origins, initial_times)
probe/name	scalar	str	—	Probe name (NuevoSono IVUS)
probe/type	scalar	str	—	Probe geometry type (custom)
probe/probe_geometry	[1, 3]	float32	m	Element position (single element at the origin)
probe/probe_center_frequency	scalar	float32	Hz	Nominal center frequency (30 MHz)
metadata/subject/{id, type}	scalar	str	—	Subject identifier (porcine_<acq>) and type (animal)
metadata/credit	scalar	str	—	Attribution: Mosaic Intelligence - NuevoSono IVUS porcine dataset (CC BY 4.0)
metadata/text_report	scalar	str	—	transducer rotation direction
metadata/rotation/{samples, sampling_frequency, start_time_offset}	[1] / scalar / scalar	float32	— / Hz / s	Transducer rotation: samples = +1 clockwise, -1 counterclockwise
metadata/pullback_position/{samples, sampling_frequency, start_time_offset}	[n_frames] / scalar / scalar	float32	m / Hz / s	Linear encoder pullback position per frame (tracked acquisitions only)

Per-dataset details

One data card per contributed sub-dataset. All fields follow the shared schema above. n_ax = 8192, n_el = 1, and n_labels = 4 (background, lumen, intima_media, guidewire) for every acquisition.

15_10_18_21 (untracked, counterclockwise)

• Dimensions: n_frames = 100, n_tx = 540, H = 985, W = 986
• Frame rate: ~3.33 Hz
• Rotation: metadata/rotation/samples = -1 (counterclockwise); metadata/text_report = "Transducer rotation direction: counterclockwise."
• Tracking: none — no metadata/pullback_position group (source has no frameAttributes.txt)
• Stored HDF5 size: 1.46 GB (1,456,209,920 bytes).
• Note: the image/mask grid is non-square (985 x 986)

15_10_50_19 (untracked, counterclockwise)

• Dimensions: n_frames = 60, n_tx = 360, H = 985, W = 986
• Frame rate: ~3.33 Hz
• Rotation: metadata/rotation/samples = -1 (counterclockwise)
• Tracking: none — no metadata/pullback_position group
• Stored HDF5 size: 592.12 MB (592,117,760 bytes).
• Note: the image/mask grid is non-square (985 x 986)

15_16_45_06 (untracked, counterclockwise)

• Dimensions: n_frames = 100, n_tx = 540, H = 985, W = 986
• Frame rate: ~3.33 Hz
• Rotation: metadata/rotation/samples = -1 (counterclockwise)
• Tracking: none — no metadata/pullback_position group
• Stored HDF5 size: 1.46 GB (1,456,275,456 bytes).
• Note: the image/mask grid is non-square (985 x 986)

22_12_10_52 (tracked, clockwise)

• Dimensions: n_frames = 150, n_tx = 540, H = W = 2048
• Frame rate: ~3.33 Hz
• Rotation: metadata/rotation/samples = +1 (clockwise)
• Tracking: includes metadata/pullback_position [150] (linear encoder position per frame)
• Stored HDF5 size: 2.36 GB (2,356,936,704 bytes).

22_12_29_46 (tracked, clockwise)

• Dimensions: n_frames = 100, n_tx = 540, H = W = 2048
• Frame rate: ~8.33 Hz
• Rotation: metadata/rotation/samples = +1 (clockwise)
• Tracking: includes metadata/pullback_position [100]
• Stored HDF5 size: 1.60 GB (1,602,945,024 bytes).

22_12_38_45 (tracked, clockwise)

• Dimensions: n_frames = 150, n_tx = 360, H = W = 2048
• Frame rate: ~8.33 Hz
• Rotation: metadata/rotation/samples = +1 (clockwise)
• Tracking: includes metadata/pullback_position [150]
• Stored HDF5 size: 1.58 GB (1,576,337,408 bytes).

22_13_10_16 (tracked, clockwise)

• Dimensions: n_frames = 100, n_tx = 540, H = W = 2048
• Frame rate: ~8.33 Hz
• Rotation: metadata/rotation/samples = +1 (clockwise)
• Tracking: includes metadata/pullback_position [100]
• Stored HDF5 size: 1.54 GB (1,535,311,872 bytes).

22_13_56_43 (tracked, clockwise)

• Dimensions: n_frames = 100, n_tx = 540, H = W = 2048
• Frame rate: ~8.33 Hz
• Rotation: metadata/rotation/samples = +1 (clockwise)
• Tracking: includes metadata/pullback_position [100]
• Stored HDF5 size: 1.53 GB (1,527,119,872 bytes).

22_14_29_54 (tracked, clockwise)

• Dimensions: n_frames = 150, n_tx = 360, H = W = 2048
• Frame rate: ~3.33 Hz
• Rotation: metadata/rotation/samples = +1 (clockwise); metadata/text_report = "Transducer rotation direction: clockwise."
• Tracking: includes metadata/pullback_position [150]
• Stored HDF5 size: 1.65 GB (1,653,080,064 bytes).

Dataset Quantification

Current OpenH-RF release: 9 HDF5 files; 13.76 GB (13,756,334,080 bytes) stored; root zea_version 0.1.6. Sizes include all HDF5 contents and use decimal units (MB = 10^6 bytes, GB = 10^9 bytes, TB = 10^12 bytes), not decoded-array memory or original-source download sizes.

• Acquisitions: 9 (3 untracked 15_*, 6 tracked 22_*)
• Frames per acquisition: 60–150 (1010 frames total across all acquisitions)
• Frame rate: ~3.33 Hz or ~8.33 Hz depending on acquisition (see per-dataset table)
• Train / validation / test split: N/A
• Stored HDF5 size: 13.76 GB (13,756,334,080 bytes).

Acquisition	Frames	n_tx	H x W	Frame rate	Rotation	Tracking	Size
15_10_18_21	100	540	985 x 986	~3.33 Hz	counterclockwise	untracked	1.46 GB
15_10_50_19	60	360	985 x 986	~3.33 Hz	counterclockwise	untracked	592.12 MB
15_16_45_06	100	540	985 x 986	~3.33 Hz	counterclockwise	untracked	1.46 GB
22_12_10_52	150	540	2048 x 2048	~3.33 Hz	clockwise	tracked	2.36 GB
22_12_29_46	100	540	2048 x 2048	~8.33 Hz	clockwise	tracked	1.60 GB
22_12_38_45	150	360	2048 x 2048	~8.33 Hz	clockwise	tracked	1.58 GB
22_13_10_16	100	540	2048 x 2048	~8.33 Hz	clockwise	tracked	1.54 GB
22_13_56_43	100	540	2048 x 2048	~8.33 Hz	clockwise	tracked	1.53 GB
22_14_29_54	150	360	2048 x 2048	~3.33 Hz	clockwise	tracked	1.65 GB

Subject Metadata

Animal study data — no human subjects.

Data Validation

A zea.Pipeline reconstructs the IVUS B-mode from the raw channel data (RF → envelope → normalization → log compression → scan conversion). See reconstruct.py and pipeline.yaml. Linear encoder position (when applicable) and segmentation masks are overlayed on the B-modes.

Known Issues

• Untracked (15_*) acquisitions have no pullback_position, so the pullback trajectory panel is omitted during reconstruction.

Ethical Considerations

Porcine animal study data only; contains no human subjects or PHI. Collected and released in compliance with applicable institutional animal care approvals and OpenH-RF governance and data-sharing policies.