non-1000 SID images

[seandomal]

I am trying to use the picket fence module for our elekta unity machine in which the iso is at 143.5 cm instead of 100 cm. I would like to request a feature update to allow for the integration of non-1000 SID images with appropriate error scaling.

[jrkerns]

The iso is already accounted for if the image has the appropriate tags. Pylinac will use the DICOM tags if they exist (and ignore anything passed), otherwise you can specify them yourself.

E.g.

pf = PicketFence(f, image_kwargs={'sad': 1435, 'sid': 1600})  # only works if the DICOM tags are missing. 

You can attach the image if you want and we can check the tags. Elekta has a pretty terrible track record for them so it's not out of the question.