Dosimetric Comparisons of Volumetric Modulated Arc Therapy and Tomotherapy for Early T-Stage Nasopharyngeal Carcinoma

Table 1

Selected patients and tumor characteristics.

Case no.	Age	Sex	T stage	N stage	M stage	Clinical stage
01	40	M	2	2	0	III
02	52	F	1	3	0	IV
03	53	M	2	2	0	III
04	38	F	2	0	0	II
05	64	M	2	3	0	IV
06	52	F	2	0	0	II
07	42	M	2	1	0	II
08	53	M	2	1	0	II
09	53	M	1	2	0	III
10	41	M	2	1	0	II

Tumor stage is based on the 8th AJCC staging system. PGTVnx, PGTVnd, PTV1, and PTV2 refer to the PTV of primary tumor of nasopharynx, positive metastatic lymph nodes, high risk region, and low risk region, respectively.