| { |
| "table_description": "This table contains one row per Positron Emission Tomography Image Storage (SOPClassUID 1.2.840.10008.5.1.4.1.1.128) DICOM series in IDC, capturing PET acquisition, reconstruction and radiopharmaceutical 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 PET-specific acquisition parameters. ActualFrameDuration is reported as an array of all distinct per-instance values because it legitimately varies across frames in dynamic (multi-frame) PET acquisitions. All other attributes are constant within a series and are aggregated with ANY_VALUE.", |
| "columns": [ |
| { |
| "name": "SeriesInstanceUID", |
| "type": "STRING", |
| "mode": "NULLABLE", |
| "description": "DICOM SeriesInstanceUID \u2014 unique identifier of the PET series; use to join with idc_index" |
| }, |
| { |
| "name": "SeriesType", |
| "type": "STRING", |
| "mode": "NULLABLE", |
| "description": "acquisition type of the series as defined in DICOM SeriesType attribute, encoded as a slash-separated string of the two type values (e.g., STATIC/IMAGE, DYNAMIC/IMAGE, GATED/IMAGE, WHOLE BODY/IMAGE); constant across instances \u2014 aggregated with ANY_VALUE(ARRAY_TO_STRING(SeriesType, '/'))" |
| }, |
| { |
| "name": "Units", |
| "type": "STRING", |
| "mode": "NULLABLE", |
| "description": "pixel value units as defined in DICOM Units attribute (e.g., BQML = Bq/mL, CNTS = counts, CPS = counts/s, GML = g/mL); constant across instances \u2014 aggregated with ANY_VALUE" |
| }, |
| { |
| "name": "DecayCorrection", |
| "type": "STRING", |
| "mode": "NULLABLE", |
| "description": "type of decay correction applied as defined in DICOM DecayCorrection attribute (START = corrected to scan start time, ADMIN = corrected to radiopharmaceutical administration time, NONE = no correction); constant across instances \u2014 aggregated with ANY_VALUE" |
| }, |
| { |
| "name": "CorrectedImage", |
| "type": "STRING", |
| "mode": "REPEATED", |
| "description": "list of corrections applied to the image as defined in DICOM CorrectedImage attribute (e.g., ATTN = attenuation, SCAT = scatter, DECY = decay, RAN = randoms); may contain multiple values; constant across instances \u2014 aggregated with ANY_VALUE" |
| }, |
| { |
| "name": "RandomsCorrectionMethod", |
| "type": "STRING", |
| "mode": "NULLABLE", |
| "description": "method used for randoms correction as defined in DICOM RandomsCorrectionMethod attribute; constant across instances \u2014 aggregated with ANY_VALUE" |
| }, |
| { |
| "name": "ReconstructionMethod", |
| "type": "STRING", |
| "mode": "NULLABLE", |
| "description": "reconstruction algorithm as defined in DICOM ReconstructionMethod attribute (e.g., OSEM, FBP); constant across instances \u2014 aggregated with ANY_VALUE" |
| }, |
| { |
| "name": "ActualFrameDuration", |
| "type": "FLOAT", |
| "mode": "REPEATED", |
| "description": "distinct actual frame durations in ms present in the series, derived from DICOM ActualFrameDuration attribute; aggregated as ARRAY_AGG(DISTINCT) across all instances because ActualFrameDuration legitimately varies across frames in dynamic PET acquisitions; single-element array for static PET, multi-element for dynamic PET with variable frame durations" |
| }, |
| { |
| "name": "ScatterCorrectionMethod", |
| "type": "STRING", |
| "mode": "NULLABLE", |
| "description": "scatter correction method as defined in DICOM ScatterCorrectionMethod attribute; constant across instances \u2014 aggregated with ANY_VALUE" |
| }, |
| { |
| "name": "AttenuationCorrectionMethod", |
| "type": "STRING", |
| "mode": "NULLABLE", |
| "description": "attenuation correction method as defined in DICOM AttenuationCorrectionMethod attribute; constant across instances \u2014 aggregated with ANY_VALUE" |
| }, |
| { |
| "name": "RadionuclideCodeMeaning", |
| "type": "STRING", |
| "mode": "NULLABLE", |
| "description": "code meaning of the radionuclide used, from RadiopharmaceuticalInformationSequence[0].RadionuclideCodeSequence[0].CodeMeaning; (e.g., Fluorine F18, Gallium Ga-68); constant across instances \u2014 aggregated with ANY_VALUE" |
| }, |
| { |
| "name": "RadionuclideTotalDose", |
| "type": "FLOAT", |
| "mode": "NULLABLE", |
| "description": "total administered dose of the radionuclide in Bq, from RadiopharmaceuticalInformationSequence[0].RadionuclideTotalDose; constant across instances \u2014 aggregated with ANY_VALUE" |
| }, |
| { |
| "name": "RadiopharmaceuticalStartTime", |
| "type": "STRING", |
| "mode": "NULLABLE", |
| "description": "time of radiopharmaceutical administration (injection time), from RadiopharmaceuticalInformationSequence[0].RadiopharmaceuticalStartTime; stored as STRING (HH:MM:SS.FFFFFF) because DICOM TIME type is not supported in parquet output; constant across instances \u2014 aggregated with ANY_VALUE" |
| }, |
| { |
| "name": "Radiopharmaceutical", |
| "type": "STRING", |
| "mode": "NULLABLE", |
| "description": "free-text name of the radiopharmaceutical as defined in RadiopharmaceuticalInformationSequence[0].Radiopharmaceutical (e.g., Fluorodeoxyglucose F^18^); values are not standardized across sites; see RadionuclideCodeMeaning for a more consistent alternative; 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]; PET 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]; PET 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; constant across instances \u2014 aggregated with ANY_VALUE" |
| }, |
| { |
| "name": "NumberOfSlices", |
| "type": "INTEGER", |
| "mode": "NULLABLE", |
| "description": "total number of slices in the series as defined in DICOM NumberOfSlices attribute; constant across instances \u2014 aggregated with ANY_VALUE" |
| }, |
| { |
| "name": "NumberOfTimeSlices", |
| "type": "INTEGER", |
| "mode": "NULLABLE", |
| "description": "number of time frames in the series as defined in DICOM NumberOfTimeSlices attribute; populated only for dynamic (multi-frame) PET series, NULL for static PET; constant across instances \u2014 aggregated with ANY_VALUE" |
| } |
| ] |
| } |
