From 3cf63d335ebe392a8c77f0c90395c18150647aeb Mon Sep 17 00:00:00 2001 From: Willem Jan Palenstijn Date: Fri, 29 Mar 2019 21:21:29 +0100 Subject: Adjust adjoint to line integral scaling --- cuda/3d/cone_bp.cu | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) (limited to 'cuda/3d/cone_bp.cu') diff --git a/cuda/3d/cone_bp.cu b/cuda/3d/cone_bp.cu index feebda2..2a7ec80 100644 --- a/cuda/3d/cone_bp.cu +++ b/cuda/3d/cone_bp.cu @@ -140,8 +140,10 @@ __global__ void dev_cone_BP(void* D_volData, unsigned int volPitch, int startAng if (FDKWEIGHT) { // The correct factor here is this one: // Z[idx] += (fr*fCd.w)*(fr*fCd.w)*fVal; - // This is the square of the inverse magnification factor - // from fX,fY,fZ to the detector. + // This is the square of the magnification factor + // from fX,fY,fZ to the virtual detector, where the + // virtual detector is the plane through the origin + // parallel to the detector, so spanned by u,v. // Since we are assuming we have a circular cone // beam trajectory, fCd.w is constant, and we instead -- cgit v1.2.3