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Diffstat (limited to 'cuda/3d/fdk.cu')
| -rw-r--r-- | cuda/3d/fdk.cu | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/cuda/3d/fdk.cu b/cuda/3d/fdk.cu index 0630afe..11c68e1 100644 --- a/cuda/3d/fdk.cu +++ b/cuda/3d/fdk.cu @@ -83,12 +83,13 @@ __global__ void devFDK_preweight(void* D_projData, unsigned int projPitch, unsig float fV = (startDetectorV - 0.5f*dims.iProjV + 0.5f) * fDetVSize + fZShift; - // Four contributions to the weighting factors: + // Contributions to the weighting factors: // fCentralRayLength / fRayLength : the main FDK preweighting factor // fSrcOrigin / (fDetUSize * fCentralRayLength) // : to adjust the filter to the det width // || u v s || ^ 2 : see cone_bp.cu, FDKWEIGHT // pi / (2 * iProjAngles) : scaling of the integral over angles + // fVoxSize ^ 2 : ... const float fW1 = fSrcOrigin * fDetUSize * fDetVSize; const float fW2 = fCentralRayLength / (fDetUSize * fSrcOrigin); |