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About

dcm_qa_philips_enh is a simple DICOM to NIfTI validator script and dataset. This repository is similar to dcm_qa, but includes both DICOM images from a Philips MRI scanner. Specifically, the same data was exported as both enhanced and classic DICOM data.

Details

Data provided by Sandeep Ganji, . Data was saved as both classic (where each slice is a separate file) as well as enhanced DICOM (where an entire series of images is saved as a single file) format.

  • Common Parameters

    • Manufacturer: Philips
    • Model: Ingenia Ingenia Elition X
    • Implementation Version: Philips MR 57.0
    • Software Versions: 5.7.1.1"

  • 1301 ADNI_Sag3D_MPRAGE

    • T1-weighted sequence

  • 1901/1903 3DpCASL

    • 3D Pseudo-Continuous Arterial Spin Labeling (pCASL)
    • Post Label Delay (ms): 2000

  • 2001 fcMRI_Field_Mapping

  • 2101 fcMRI

    • Functional connectivity resting-state T2*-weighted images

  • 2201 DTI_S2MB2

    • Diffusion-weighted sequence
    • TE = 72ms, TR = 4972ms

  • 2301 DTIphase_S2MB2

    • Diffusion-weighted sequence
    • TE = 86ms, TR = 4549ms

Classic versus Enhanced Information

In general, the classic and enhanced images contain the same information. However, there are minor differences that will lead to subtle differences in conversion. For example, for some sequences the classic scans provide information about acquisition time, which may be useful for time-locking other information (e.g. behavioral or physiological recordings)

(0008,0013) TM [094128.613]                             #  10, 1 InstanceCreationTime
(0008,0030) TM [121816]                                 #   6, 1 StudyTime
(0008,0031) TM [130004.57000]                           #  12, 1 SeriesTime
(0008,0032) TM [130013.04]                              #  10, 1 AcquisitionTime

Enhanced images do not always provide precise acquisition time.

(0008,0013) TM [094022.303]                             #  10, 1 InstanceCreationTime
(0008,0030) TM [121816]                                 #   6, 1 StudyTime
(0008,0031) TM [130004.57000]                           #  12, 1 SeriesTime

License

The code and images are covered by the 2-clause BSD license.

Versions

  • 10-Sept-2021 Initial public release

Running

Assuming that the executable dcm2niix is in your path, you should be able to simply run the script batch.sh from the terminal.

Useful Links

  • dcm2niix's handling of these files is described here.