Utility to fetch CSA headers from DICOM?

[matthew-brett]

Nibabel has a get_csa_header function : https://github.com/nipy/nibabel/blob/master/nibabel/nicom/csareader.py#L31

It implements the logic of finding the image or series CSA header from the DICOM file. I see from that file that there is logic for finding where the relevant private elements start: https://github.com/nipy/nibabel/blob/master/nibabel/nicom/utils.py#L7. . So, for example, instead of doing this:

raw_csa = dcm.get((0x29, 0x1020)).value
CsaHeader(raw_csa).read()

you can do this:

get_csa_header(dcm, 'image')

[matthew-brett]

I guess that could be implemented as:

CSAHeader.from_dcm(dcm, 'image')

[ZviBaratz]

Absolutely, that would be fantastic.

[matthew-brett]

What repository should we use to hold the example DICOM files for testing?

[matthew-brett]

E.g. for Nipraxis : https://github.com/nipraxis/nipraxis-data

[ZviBaratz]

I think it would be ideal if we could leverage multiple download URLs to integrate data from dicom-gallery type repositories. WDYT?

[matthew-brett]

Yup - looks to be trivial using the urls kwarg for Pooch : https://www.fatiando.org/pooch/v1.2.0/intermediate.html

[matthew-brett]

I'll refactor the Nipraxis fetcher into its own mini-package. I've already refactored it so it uses a YaML config file to define its parameters. So we can probably just drop the package into csa_header, in a bit.

[matthew-brett]

Refactored code into https://github.com/matthew-brett/unscrewed . Will add mini data repository and example fetches from the DICOM gallery tomorrow.