Analysis of late toxicity in nasopharyngeal carcinoma patients treated with intensity modulated radiation therapy

Radiation Oncology

Table 2 The actual exposure doses of targets and parts of organs at risk

Target volume		Minimal dose mean	Maximum dose mean	Average dose mean	Average fractional dose mean	V95 mean	Volume	D33/D5 mean
Target volume		(Gy)	(Gy)	(Gy)	(Gy)	(%)	Volume	(Gy)
GTVnx		63.42	78.34	71.99	2.40	99.38
GTVndL		59.07	71.53	71.53	2.38	99.73
GTVndR		59.16	73.42	66.47	2.22	99.93
CTV1		54.16	77.38	67.59	2.25	99.60
CTV2		37.54	76.68	60.83	2.03	98.22
OAR
Brainstem		5.47	50.47	21.99	1.54		5%	46.13
Spinal cord		7.59	37.23	24.74	1.32		1 cc	39.45
Temporal lobes	L	1.73	61.79	12.49	0.49		33%	14.76
	R	2.00	61.95	12.42	0.51			15.27
Parotids	L	14.68	58.30	31.62	1.18		33%	35.38
	R	15.00	59.09	32.26	1.22			36.60
Temporomandibular joints	L	19.34	47.54	29.22	1.15		33%	34.51
	R	19.75	46.51	29.38	1.16			34.84
Optical nerves	L	6.66	34.00	16.15	1.09		5%	32.58
	R	6.88	33.52	16.27	1.10			32.99
Optic chiasma		9.79	27.50	16.75	0.90		5%	26.93

ISSN: 1748-717X