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. Author manuscript; available in PMC: 2011 Sep 1.
Published in final edited form as: IEEE Trans Med Imaging. 2010 Jun 7;29(11):1839–1850. doi: 10.1109/TMI.2010.2050898

TABLE II.

Speed comparison of DD, SF-TR and SF-TT forward and back projectors

Projectors DD SF-TR-A1 SF-TR-A2 SF-TR-A3 SF-TT-A1 SF-TT-A2
Forward time (seconds) 46 35 35 59 91 91
Backward time (seconds) 49 44 45 63 92 93