Table 1.

Mean ICRU point Doses and D2cc volume doses in bladder and rectum in our study (semi orthogonal method)

	Mean (range) ICRU (Gy)	Mean (range) D2cc (Gy)	Paired t-test (range)	Average ratio (D2cc/ICRU)
Bladder	3.08 (1.9-5.9)	6.91 (2.9-12.2)	p = 0.000, CI (2.29-5.38)	2.24 ± 1.01
Rectum	3.8 (2.4-4.45)	4.2 (2.8-5.9)	p = 0.08, CI (–0.15-0.91)	1.10 ± 0.229

ICRU – International Commission on Radiation Units and Measurements; D2cc – dose received by 2cc of the volume of the bladder calculated from image based CT planning; CI – confidence interval