File size: 7,298 Bytes
61b55ca | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 | {
"table_description": "This table contains one row per MR Image Storage (SOPClassUID 1.2.840.10008.5.1.4.1.1.4) DICOM series in IDC, capturing MR acquisition and sequence parameters that are not included in the main idc_index table. The index can be joined to idc_index on SeriesInstanceUID to combine universal series metadata with MR-specific acquisition parameters. EchoTime and DiffusionBValue are reported as arrays of all distinct per-instance values because they legitimately differ across instances within multi-echo and diffusion-weighted series respectively. All other attributes are aggregated with ANY_VALUE (one representative instance).",
"columns": [
{
"name": "SeriesInstanceUID",
"type": "STRING",
"mode": "NULLABLE",
"description": "DICOM SeriesInstanceUID \u2014 unique identifier of the MR series; use to join with idc_index"
},
{
"name": "MagneticFieldStrength",
"type": "FLOAT",
"mode": "NULLABLE",
"description": "static magnetic field strength in Tesla as defined in DICOM MagneticFieldStrength attribute; constant across instances within a series \u2014 aggregated with ANY_VALUE"
},
{
"name": "ScanningSequence",
"type": "STRING",
"mode": "REPEATED",
"description": "pulse sequence type as defined in DICOM ScanningSequence attribute (SE = Spin Echo, GR = Gradient Recalled, IR = Inversion Recovery, EP = Echo Planar); may contain multiple values; constant across instances \u2014 aggregated with ANY_VALUE"
},
{
"name": "SequenceVariant",
"type": "STRING",
"mode": "REPEATED",
"description": "variant of the scanning sequence as defined in DICOM SequenceVariant attribute (SK = Segmented k-Space, MTC = Magnetization Transfer Contrast, SS = Steady State, TRSS = Time Reversed Steady State, SP = Spoiled, MP = MAG Prepared, OSP = Oversampling Phase, NONE = No sequence variant); may contain multiple values; constant across instances \u2014 aggregated with ANY_VALUE"
},
{
"name": "MRAcquisitionType",
"type": "STRING",
"mode": "NULLABLE",
"description": "whether the acquisition is 2D or 3D as defined in DICOM MRAcquisitionType attribute; constant across instances \u2014 aggregated with ANY_VALUE"
},
{
"name": "EchoTime",
"type": "FLOAT",
"mode": "REPEATED",
"description": "distinct echo times in ms present in the series, derived from DICOM EchoTime attribute; aggregated as ARRAY_AGG(DISTINCT) across all instances because EchoTime legitimately varies in multi-echo sequences; single-element array for single-echo series, multi-element array for multi-echo series (e.g., [2.46, 4.92, 7.38])"
},
{
"name": "RepetitionTime",
"type": "FLOAT",
"mode": "NULLABLE",
"description": "repetition time in ms as defined in DICOM RepetitionTime attribute; aggregated with ANY_VALUE \u2014 constant across instances within a series"
},
{
"name": "EchoTrainLength",
"type": "INTEGER",
"mode": "NULLABLE",
"description": "number of echoes in the echo train as defined in DICOM EchoTrainLength attribute; constant across instances \u2014 aggregated with ANY_VALUE"
},
{
"name": "FlipAngle",
"type": "FLOAT",
"mode": "NULLABLE",
"description": "flip angle in degrees as defined in DICOM FlipAngle attribute; aggregated with ANY_VALUE \u2014 constant across instances within a series"
},
{
"name": "PixelBandwidth",
"type": "FLOAT",
"mode": "NULLABLE",
"description": "receiver bandwidth per pixel in Hz as defined in DICOM PixelBandwidth attribute; aggregated with ANY_VALUE \u2014 constant across instances within a series"
},
{
"name": "ImagingFrequency",
"type": "FLOAT",
"mode": "NULLABLE",
"description": "Larmor resonance frequency in MHz as defined in DICOM ImagingFrequency attribute; proportional to MagneticFieldStrength (42.577 MHz/T for proton); constant across instances \u2014 aggregated with ANY_VALUE"
},
{
"name": "ImagedNucleus",
"type": "STRING",
"mode": "NULLABLE",
"description": "nucleus used for imaging as defined in DICOM ImagedNucleus attribute (e.g., 1H for proton, 31P, 23Na); constant across instances \u2014 aggregated with ANY_VALUE"
},
{
"name": "PixelSpacing_row_mm",
"type": "FLOAT",
"mode": "NULLABLE",
"description": "in-plane pixel spacing along the row direction in mm, derived from DICOM PixelSpacing[0]; MR pixel spacing is isotropic in almost all series in IDC; aggregated with ANY_VALUE \u2014 constant across instances within a series"
},
{
"name": "PixelSpacing_col_mm",
"type": "FLOAT",
"mode": "NULLABLE",
"description": "in-plane pixel spacing along the column direction in mm, derived from DICOM PixelSpacing[1]; MR pixel spacing is isotropic in almost all series in IDC; aggregated with ANY_VALUE \u2014 constant across instances within a series"
},
{
"name": "Rows",
"type": "INTEGER",
"mode": "NULLABLE",
"description": ""
},
{
"name": "Columns",
"type": "INTEGER",
"mode": "NULLABLE",
"description": ""
},
{
"name": "SliceThickness",
"type": "FLOAT",
"mode": "NULLABLE",
"description": "nominal slice thickness in mm as defined in DICOM SliceThickness attribute; aggregated with ANY_VALUE \u2014 constant across instances within a series"
},
{
"name": "InversionTime",
"type": "FLOAT",
"mode": "NULLABLE",
"description": "inversion time in ms as defined in DICOM InversionTime attribute; populated only for inversion recovery sequences, NULL otherwise; constant across instances \u2014 aggregated with ANY_VALUE"
},
{
"name": "ReceiveCoilName",
"type": "STRING",
"mode": "NULLABLE",
"description": "name of the receiver coil used as defined in DICOM ReceiveCoilName attribute; aggregated with ANY_VALUE \u2014 constant across instances within a series"
},
{
"name": "SequenceName",
"type": "STRING",
"mode": "NULLABLE",
"description": "manufacturer-specific pulse sequence name as defined in DICOM SequenceName attribute (e.g., *tfl* for Siemens FLASH, *ep_b1000* for Siemens EPI diffusion); aggregated with ANY_VALUE \u2014 constant across instances within a series"
},
{
"name": "DiffusionBValue",
"type": "FLOAT",
"mode": "REPEATED",
"description": "distinct diffusion b-values in s/mm\u00b2 present in the series, derived from DICOM DiffusionBValue attribute; aggregated as ARRAY_AGG(DISTINCT) across all instances because DiffusionBValue legitimately varies across instances in diffusion-weighted series; empty array for non-DWI series; multi-element for DWI (e.g., [0.0, 1000.0])"
},
{
"name": "NumberOfTemporalPositions",
"type": "INTEGER",
"mode": "NULLABLE",
"description": "number of temporal positions (time frames) in the series as defined in DICOM NumberOfTemporalPositions attribute; populated for dynamic (DCE-MRI) series; NULL otherwise; constant across instances \u2014 aggregated with ANY_VALUE"
}
]
} |