Table 3. Dosimetric parameters of the OARs in two techniques (mean±SD).

IMRT, intensity-modulated radiation therapy; SD, standard deviation; OAR, organ at risk

	IMRT 1	IMRT 2	p-value
Brainstem	33.40±14.73	35.96±11.24	0.64
Right optic nerve	5.57±5.14	4.86±4.49	0.01
Left optic nerve	4.88±4.12	4.36±3.76	0.11
Right eye	11.64±11.56	7.88±9.11	0.08
Left eye	7.39±8.33	6.19±7.42	0.02
Right lens	5.32±7.24	2.66±1.56	0.28
Left lens	3.13±2.01	2.77±1.86	0
Parotid right	40.19±17.33	41.47±16.97	0.65
Parotid left	44.30±12.38	43.75±12.27	0.74
Left cochlea	19.69±14.57	18.26±13.54	0.04
Right cochlea	22.83±11.11	22.11±11.49	0.44
Lips	26.05±5.01	24.18±7.00	0.11
PRV spine	42.46±4.45	42.25±4.38	0.64
Mandible	67.61±4.97	67.52±5.32	0.8