. Author manuscript; available in PMC: 2007 Jun 18.

Published in final edited form as: Int J Radiat Oncol Biol Phys. 2005 Oct 19;64(2):518–526. doi: 10.1016/j.ijrobp.2005.07.970

Table 2. Dosimetric parameters for the PTV1, rectum, bladder, and femoral heads.

	Mean ± SEM
Parameter	Arm I	Arm II
CTV1 volume (cm³)	54.2 ± 3.1	65.0 ± 4.1
PTV1 volume (cm³)	145.1 ± 5.8	158.4 ± 7.5
Rectal volume (cm³)	58.8 ± 2.4	57.4 ± 2.7
Bladder volume (cm³)	261.0 ± 18.8	254.9 ± 18.7
PTV1 D95% (Gy)^*	76.0 ± 0.2	70.4 ± 0.1
PTV1 mean dose (Gy)^*	81.1 ± 0.3	73.8 ± 1.0
PTV1 max dose (Gy)^*	88.4 ± 0.3	82.4 ± 0.3
PTV1 min dose (Gy)^*	62.8 ± 1.2	55.7 ± 1.2
Rectal V65/50 Gy (%)^*	11.7 ± 0.4	15.9 ± 0.5
Rectal V40/31 Gy (%)^*	28.1 ± 1.2	29.8 ± 0.9
Bladder V65/50 Gy (%)^*	16.1 ± 1.2	27.1 ± 1.8
Bladder V40/31 Gy (%)^*	34.8 ± 2.2	45.6 ± 2.7
Bladder max dose (Gy)^*	86.8 ± 0.3	80.6 ± 0.3
Rectal max dose (Gy)^*	86.4 ± 0.3	79.4 ± 0.3
Right femoral head V50/40 Gy (%)^*	1.0 ± 0.3	3.1 ± 0.5
Left femoral head V50/40 Gy (%)^*	1.4 ± 0.4	3.4 ± 0.5

Abbreviations: Arm I = conventional fraction intensity-modulated radiation therapy; Arm II = hypofractionation intensity-modulated radiation therapy; CTV = clinical tumor volume; PTV = planning target volume; D95% = dose to 95% of the volume.

p < 0.05 between groups, two-sided Wilcoxon test.