MR Spectroscopy

MR Spectroscopy (MRS) DICOM series are supported by Shanoir-NG.

Example series: CSI, SPECTRO HISTO CNX, svs_st, 2D_SE_35 NEW (Neurinfo)

1. Import and download of MRS DICOM files are possible, even if the preview in dataset details will not work for the below reasons with Papaya
2. MRS DICOM series are detected by:

• Detected by SOPClassUID equals 1.2.840.10008.5.1.4.1.1.4.2=MR Spectroscopy Storage OR
• Detected by SOPClassUID equals 1.3.12.2.1107.5.9.1=Private Siemens CSA Non Image Storage OR
• Detected by seriesDescription contains: seriesDescription==CSI;seriesDescription==csi;seriesDescription==SPECTRO;seriesDescription==spectro;
• MR Spectroscopy Storage (1.2.840.10008.5.1.4.1.1.4.2) is Enhanced MR
• Private Siemens CSA Non Image Storage (1.3.12.2.1107.5.9.1) is Original MR

3. MRS DICOM files do not contain the typical PixelData tag, with the binary image information, but contain a special tag: SpectroscopyData (5600,0020) with the data. Our current viewer Papaya does, as integrated today, not seem to support these kind of files.
4. MRS DICOM files can be

• Single-Voxel
• Multi-Voxel
• Multi-Slice

5. The DICOM zip + pacs imports "tag" MRS DICOM series with "spectroscopy" keyword (2. Select Series), special icon to come
6. Import (2. Select Series): preview with Papaya is disabled, as no PixelData
7. MRS DICOM series are excluded from automatic NIfTI conversion by default
8. MRS DICOM series are supported in formats:

• Original MR (SOPClass: 1.2.840.10008.5.1.4.1.1.4): NEMA
• Enhanced MR (SOPClass: 1.2.840.10008.5.1.4.1.1.4.2): NEMA

9. Automatic Calculation of MRDatasetNature:

• H1_SINGLE_VOXEL_SPECTROSCOPY_DATASET(15): if ROWS(0028,0010) and COLUMNS (0028,0011) == 1
• H1_SPECTROSCOPIC_IMAGING_DATASET(16): otherwise

Comment: AcquisitionContrast (0008,9209) == SPECTROSCOPY is an interesting detection attribute as well.

Tested with data from Siemens, MRS, NoDicomDir and with Philips, MRS, WithDicomDir. Both work now.