'Arc' geometry in fan beam projection?

Dear Developers:

I am trying to rewrite fan beam projection from Matlab using python odl. In the 2D fan beam transformation example, it seems that you only support 'line' geometry projection in Matlab implementation. I wonder is there any way to achieve the same effect of 'arc' geometry in Matlab using odl?

Hi Jaakk0f, sadly this is not supported but it's been widely discussed. There's some discussion in #1560 and #1578 and @JevgenijaAksjonova might have more details for you.

There's some code doing interpolation of datasets (for 3d helical) in the Mayo clinic code which you might be able to re-use. https://github.com/odlgroup/odl/blob/2a0c03c429ef6b44e6fbcd1c09456b8054016a09/odl/contrib/datasets/ct/mayo.py#L86-L196