Hi, In rtkParkerShortScanFilter.hxx (line 113) and rtkCudaParkerShortScanFilter.cxx (line 95), the overscan angle is checked to be large enough for the used beam fan angle. (There is a difference between how this check is performed in the two cases. It seems like the CUDA-version assumes that the piercing point is in the middle of the detector. That's not what this question is about though.)
The beam fan angle seems to be computed as arctan( halfDetectorWidth / sourceToIsocenterDistance ) Why sourceToIsocenterDistance? Shouldn't it be sourceToDetectorDistance? If the detector is far away from the isocenter, the beam fan angle should also be small as far as I understand. This is not reflected in this computation. Best regards, Fredrik Hellman
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