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-rw-r--r--cuda/3d/fdk.cu6
1 files changed, 5 insertions, 1 deletions
diff --git a/cuda/3d/fdk.cu b/cuda/3d/fdk.cu
index fd5a8a2..45b6a28 100644
--- a/cuda/3d/fdk.cu
+++ b/cuda/3d/fdk.cu
@@ -267,7 +267,11 @@ __global__ void devFDK_ParkerWeight(void* D_projData, unsigned int projPitch, un
//const float fGamma = atanf(fU / fCentralRayLength);
//const float fBeta = gC_angle[angle];
const float fGamma = atanf(fU / fCentralRayLength);
- const float fBeta = -gC_angle[angle];
+ float fBeta = -gC_angle[angle];
+ if (fBeta < 0.0f)
+ fBeta += 2*M_PI;
+ if (fBeta >= 2*M_PI)
+ fBeta -= 2*M_PI;
// compute the weight depending on the location in the central fan's radon
// space