Hi, I am using the CUDAForwardProjection functionality of RTK through the SimpleRTK wrapper. I am trying to generate DRRs that are realistic and simulates fluoroscopic images of the structure and thus far I've setup the image spacing and pixel based on the dimensions of the C-arm that was used to acquire the CT and the fluoroscopic images and have gotten good results when the detector is simulated to have all angles at 0.
However, when I attempt to simulate movement of the model (by changing the X/Y coordinate on the projection image of isocenter or by modifying the X/Y source offset), the overall intensity of my projection image sees a drastic drop. It would be greatly appreciated if anyone could advise on whether this may be an issue of me incorrectly setting my ConstantImageSource or if I am simulating the offset of my structures incorrectly. I apologize if I am vague on any points or if anything is unclear, please let me know. Thank you, Daniel Xun Lin
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