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qurit / PyTomography

This repository enables easy and fast medical image reconstruction in Python.
https://pytomography.readthedocs.io/en/latest/#
MIT License
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SPECT dicom output #158

Closed sarakurkowska closed 2 weeks ago

sarakurkowska commented 2 months ago

Improve the dicom output of modality NM:

sjswerdloff commented 2 months ago

Improve the dicom output of modality NM:

  • Series Description - change
  • 'RotationInformationSequence' tag - add

Series Description is being copied from the projection data: https://github.com/qurit/PyTomography/blob/9bd1a56a3f10108f11de4326653cc49e21ff4e4e/src/pytomography/io/SPECT/dicom.py#L721

What change is desired? (I'm not a current contributor yet, but I know DICOM and I'm familiar with SPECT)

The same line of code as above is where the RotationInformationSequence needs to be added to the list of elements to copy.

sarakurkowska commented 2 months ago

Hey, no worries. I'm familiar with DICOM and SPECT, and I'll work on that. There are a couple of tags I wanted to improve, but I was traveling, so I started to put the notes in here to make sure they don't get lost

sjswerdloff commented 2 months ago

Digging a little deeper, the Number of Rotations for a RECON TOMO is supposed to be 1, so how does one reconcile the need to have a single item in the RotationInformationSequence if the TOMO itself had multiple rotations (and multiple items in the RotationInformationSequence)? I put in a PR, but hadn't dug through the consequences. https://dicom.innolitics.com/ciods/nuclear-medicine-image/nm-multi-frame/00540051

C.8.4.8.1.5 Number of Rotations and Rotation Vector Number of Rotations (0054,0051) is the number of separate rotations. See Section C.8.4.12 for definition of a rotation. When Image Type (0008,0008), Value 3, is RECON TOMO, GATED TOMO or RECON GATED TOMO, then the Number of Rotations (0054,0051) shall be 1.

lukepolson commented 2 weeks ago

Closing because this was validated in MIM and reconstructed images can be opened