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. Author manuscript; available in PMC: 2014 Jul 3.
Published in final edited form as: Phys Med Biol. 2011 Oct 21;56(20):6739–6757. doi: 10.1088/0031-9155/56/20/015

Table 3.

Computation cost of each kernel in forward and backward projectors (unit in millisecond).

Forward pipeline (ms) Image maker Forward projection (SpMV) Sinogram maker
2.2 1668.0/1897.7 (with/w.o texture memory) 17.3
Backward pipeline (ms) Sinogram maker Backward projection (SpMV) Image maker
15.4 1431.2/2989.2 (with/w.o texture memory) 5.7