Cone beam CT simulation by Deshan Yang

To simulate a CBCT system by computing the 2D X-ray projection images. (ct, projection, line integration)

compute_one_projection(xs,ys,zs,data3d,psrc,pcdet,su,sv,nu,...

compute_one_projection_method_2(xs,ys,zs,data3d,psrc,pcdet,...

compute_one_projection_method_3(xs,ys,zs,data3d,psrc,pcdet,...