Fig. 19.
Reconstructed results from a clinical data set. (a) is reconstructed by the FDK algorithm as a reference. (b) and (c) are reconstructed by the GPU-BL CPU-32, respectively. (d) is the differences between GPU-BL and CPU-32 in a display widow [−0.5, 0.5] HU. (e) and (f) are the differences between the FDK reference and GPU-BL and CPU-32 in display window [−20, 20] HU, respectively.