From 959f476f456b147999649ec3a8cca10017b2ad6c Mon Sep 17 00:00:00 2001 From: Willem Jan Palenstijn Date: Wed, 16 Apr 2014 11:13:26 +0000 Subject: Add support for short-scan fan-beam FBP Note that currently angles have to be negative for this to work. (This should be changed.) --- cuda/3d/fdk.cu | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) (limited to 'cuda/3d/fdk.cu') 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 -- cgit v1.2.3