Accuracy Evaluation of Collapsed Cone Convolution Superposition Algorithms for the Nasopharynx Interface in the Early Stage of Nasopharyngeal Carcinoma

Table 1

Dose summary of target and organ at risk calculated by IMRT, VMAT, and tomotherapy.

	IMRT	VMAT	Tomotherapy
(GTV)/%	100	100	100
(PTV1)/%	96.0	96.0	100
(PTV2)/%	95.0	97.0	99.9
(brainstem)/cGy	3899	3806	3574
(spinal cord)/cGy	3597	3228	3257
(R’t parotid gland)/cGy	2209	2174	2387
(L’t parotid gland)/cGy	2101	2057	2064