Optimizing resolution and spacing parameters in Plastimatch DRR

[fieldr4 (Andrew Fields)]

@Mik

So you need only a projection matrix, not the coordinates of projected points? You don’t need to change anything in logic, but after update you can calculate projection of the points on image plane, either in GUI or in 3D Slicer python shell, using a simple script.

That’s a fair point–my previous post didn’t capture my full workflow. I am actually just copying the projection matrix and RAS points into an Excel template that I created, which outputs the pixel coordinates. It’d be great to skip that altogether, but I am okay with the manual labor.

@Mik

Plastimatch simulates beam divergence (x-ray source to isocenter distance can be set in the “Beams” module). It’s not a parallel geometry, then x-ray comes from infinity.

I see the controls for SAD/SID

Are there any process parameters that influence beam divergence?

Is there any documentation of the beam divergence from Plastimatch?

Thanks again for all of your help. I appreciate the prompt replies on a Saturday.