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}

See my comments here:

  http://neurostars.org/t/slicetiming-val...

This data was acquired with an early multiband (SMS) research sequence from the MGH. The sequence stored the single-band rather than multi-band slice times in the DICOM CSA header. My software assumes that the DICOM data is useful. I note you are using a version of my software from 2022 (v1.0.20220720). You should try the latest release to see if it can find any DICOM headers with valid timing. If this does not work, you will need to contact the developers of the sequence to find out their SMS slice timing pattern.

Thank you for your reply! Unfortuantely I got the same error with the newer release. I will try contacting the developers. Thank you again!