added asl-support content in utils.py and dicoms.py files

[pbbaba]

No description provided.

[yarikoptic]

just

Suggested change

	in_plane_phase_encoding_direction = dcminfo.get("InPlanePhaseEncodingDirection") if dcminfo.get("InPlanePhaseEncodingDirection") else None,
	in_plane_phase_encoding_direction = dcminfo.get("InPlanePhaseEncodingDirection"),

and so on would be sufficient. But first please elaborate why these particular are necessary for ASL support?
Note: we do not really want to extend list of extracted fields to get unnecessarily long.

NB I should really look into finishing #581 some days soon to provide means for easy extraction of any metadata desired.

[pbbaba]

I added the if..else condition so as to avoid the code break if any dicom image does not contain these headers. It did break for 'Image Orientation Patient' tag.

I added these extra tags so as to make them accessible for naming the perf files during the BIDS conversion.

[yarikoptic]

I added the if..else condition so as to avoid the code break if any dicom image does not contain these headers. It did break for 'Image Orientation Patient' tag.

.get("key") should work and default to None if there is no "key". So code should not break and if..else hence not needed

[yarikoptic]

ping @pbbaba - do you have time to tune up the PR following the review?