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. Author manuscript; available in PMC: 2014 Nov 21.
Published in final edited form as: Phys Med Biol. 2013 Oct 31;58(22):8077–8097. doi: 10.1088/0031-9155/58/22/8077

Table 1.

Organ mean contour volumes on CT and CBCT images and their differences and ratios. [unit: cm3]

Prostate Bladder
CT CBCT CT-CBCT CT/CBCT CT CBCT CT-CBCT CT/CBCT
Pt #1 60 61 −1 1.0 178 81 97 2.2
Pt #2 43 47 −4 0.9 80 94 −14 0.9
Pt #3 38 37 1 1.0 371 390 −19 1.0
Rectum SV
CT CBCT CT-CBCT CT/CBCT CT CBCT CT-CBCT CT/CBCT
Pt #1 77 85 −8 0.9 9 7 2 1.3
Pt #2 58 60 −2 1.0 8 7 1 1.1
Pt #3 59 62 −3 1.0 26 16 10 1.6