Table 1B.

Dosimetric results for the PTV-elective.

Parameter	IMRT	Single arc RA plan	Double arc RA plan	P	P*	P**
D98% (Gy)	59.43 ± 1.147	57.98 ± 0.914	58.93 ± 1.46	0.182	0.079	0.376
D2% (Gy)	64.56 ± 1.868	65.10 ± 0.966	64.38 ± 1.606	0.526	0.699	0.431
HI	0.0945 ± 0.010	0.1146 ± 0.014	0.0875 ± 0.005	0.006	0.024	0.011

P – paired t-test analysis: IMRT vs. single arc RA; P^* – paired t-test analysis: IMRT vs. double arc RA; P^** – paired t-test analysis: single arc RA vs. double arc RA.