Hello,
I am trying to convert some old DICOM files to nifti, but have
gotten an error warning me that my slice times may be corrupted.
Upon investigation, many of the slice timings are greater than my
TR. The issue does not appear to be due to incorrect units (eg TR
in seconds and slice timings in milliseconds). I have provided the
JSON contents below and happy to provide additional information if
helpful. Any suggestions on how to approach this issue would
be greatly appreciated!
JSON contents:
{
"AcquisitionMatrixPE": 98,
"AcquisitionNumber": 1,
"AcquisitionTime": "09:36:53.452500",
"BandwidthPerPixelPhaseEncode": 14.789,
"BaseResolution": 98,
"BodyPartExamined": "BRAIN",
"CoilCombinationMethod": "Sum of Squares",
"ConsistencyInfo": "N4_VD13A_LATEST_20120616",
"ConversionSoftware": "dcm2niix",
"ConversionSoftwareVersion": "v1.0.20220720",
"DerivedVendorReportedEchoSpacing": 0.000689978,
"DeviceSerialNumber": "45306",
"DwellTime": 2.9e-06,
"EchoTime": 0.033,
"EchoTrainLength": 86,
"EffectiveEchoSpacing": 0.000689978,
"FlipAngle": 65,
"HeudiconvVersion": "0.12.2",
"ImageComments": "SMS_MGH_V2.1; MB=5; FOVshift=4; K_PE=3;
K_RO=3; CCR=1; LeakBlockOn;",
"ImageOrientationPatientDICOM": [1, 0, 0, 0, 1, 0],
"ImageOrientationText": "Tra",
"ImageType": [
"ORIGINAL",
"PRIMARY",
"M",
"ND",
"MOSAIC"
],
"ImagingFrequency": 123.232,
"InPlanePhaseEncodingDirectionDICOM": "COL",
"InstitutionAddress":
"InstitutionName":
"InstitutionalDepartmentName":
"MRAcquisitionType": "2D",
"MagneticFieldStrength": 3,
"Manufacturer": "Siemens",
"ManufacturersModelName": "Skyra",
"MatrixCoilMode": "SENSE",
"Modality": "MR",
"NonlinearGradientCorrection": false,
"PartialFourier": 0.875,
"PatientPosition": "HFS",
"PercentPhaseFOV": 100,
"PercentSampling": 100,
"PhaseEncodingDirection": "j-",
"PhaseEncodingSteps": 86,
"PhaseResolution": 1,
"PixelBandwidth": 1760,
"ProcedureStepDescription":
"ProtocolName": "Bold_sms_StressTask_run_1",
"PulseSequenceDetails":
"%CustomerSeq%\\ep2d_bold_sms_mgh_v22",
"ReceiveCoilActiveElements": "HEA;HEP",
"ReceiveCoilName": "Head_32",
"ReconMatrixPE": 98,
"RepetitionTime": 1.25,
"SAR": 0.401866,
"ScanOptions": "PFP\\FS",
"ScanningSequence": "EP",
"SequenceName": "epfSM2d1_98",
"SequenceVariant": "SK",
"SeriesDescription": "Bold_sms_StressTask_run_1",
"SeriesNumber": 3,
"ShimSetting": [1950, 7762, -14938, 328, -99, 573, 520,
81],
"SliceThickness": 2,
"SliceTiming": [0, 3.1575, 0.085, 3.24, 0.1675, 3.3225,
0.25, 3.4075, 0.3325, 3.49, 0.415, 3.5725, 0.5, 3.655, 0.5825,
3.7375, 0.665, 3.8225, 0.7475, 3.905, 0.8325, 3.9875, 0.915, 4.07,
0.9975, 4.155, 1.08, 4.2375, 1.1625, 4.32, 1.2475, 4.4025, 1.33,
4.485, 1.4125, 4.57, 1.495, 4.6525, 1.58, 4.735, 1.6625, 4.8175,
1.745, 4.9025, 1.8275, 4.985, 1.9125, 5.0675, 1.995, 5.15, 2.0775,
5.2325, 2.16, 5.3175, 2.2425, 5.4, 2.3275, 5.4825, 2.41, 5.565,
2.4925, 5.65, 2.575, 5.7325, 2.66, 5.815, 2.7425, 5.8975, 2.825,
5.98, 2.9075, 6.065, 2.99, 6.1475, 3.075],
"SoftwareVersions": "syngo MR D13",
"SpacingBetweenSlices": 2,
"StationName": "221L-3T",
"TaskName": "stress1",
"TotalReadoutTime": 0.0669278,
"TxRefAmp": 311.453}
Threaded View
| Title | Author | Date |
|---|---|---|
| jhs69 | Sep 29, 2023 | |
| Chris Rorden | Sep 29, 2023 | |
| jhs69 | Oct 2, 2023 | |
