Table 1.

Patient list. In this study, CT images and volumetric modulated arc therapy treatment plans of 11 head and neck patients were analysed. Among 11 patients, 8 patients were treated without a bite block (closed group) and 3 were treated with a bite block (opened group)

Patient number	Treatment site	Bite block
1	Nasopharynx	X
2	Nasopharynx	X
3	Nasopharynx	X
4	Parotid gland	X
5	Submandibular gland	X
6	Oral cavity	X
7	Tongue	X
8	Tongue	X
9	Mandible	O
10	Tongue (base)	O
11	Tonsil	O