Flying focal point

[Zhentao-Liu]

New feature. Flying focal point. I here got a curved-plane cbct scan data with flying focal point which means the detector focal point varying between odd/even frame. It means that the centerRow, centerCol params are different to set in set_conebeam(.) for odd/even. How should I achieve it?

[Zhentao-Liu]

Can I perform forward projection view-by-view？When I perform optimization like demo_leaptorch/test_recon_NN.py with my own cbct scan data. The projection resolution or volume size maybe large. Usually randomly select a view and forward projection, calculate loss, would save meomry cause I have 1200/2400 views or even more. Rather than directly project all views at once.

[kylechampley]

LEAP does not support FFS directly, but as you suggested you can achieve this by defining multiple instances each with a different geometry. Note that centerRow and centerCol move the detector, not the source.

There is no direct method to perform projections view-by-view. The best way to do this is to split up your data and define multiple instances each with its own geometry.

[Zhentao-Liu]

Thanks for you prompt reply. I just try out set_modularbeam, but it seems not work well. Should I use set_conebeam twice? But can two leatct instance reconstruct one volume together?