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. Author manuscript; available in PMC: 2014 May 20.
Published in final edited form as: Phys Med Biol. 2011 Aug 22;56(18):5949–5967. doi: 10.1088/0031-9155/56/18/011

Table 3.

The computation time per iteration of the EPTV algorithm on CPU and GPU.

NP NI TCPU (s) TGPU (s) TCPU/TGPU
NCAT 40 50 2.54 0.11 23.2
Chest 200 30 4.25 0.20 21.7
Catphan 400 20 7.57 0.38 19.6