Cancer Communications

Table 3 The tumor volume for targets in 40 NPC patients

From: Dosimetric benefit to organs at risk following margin reductions in nasopharyngeal carcinoma treated with intensity-modulated radiation therapy

Target		Mean (mL)	SD (mL)	Range (mL)
GTV		35.44	29.02	1.17–119.70
CTV1		112.04	50.42	21.69–239.26
CTV2		493.20	134.24	75.24–792.59
PTV_7000	Pre-correction	68.20	42.78	4.51–186.32
	Post-correction	54.65	36.02	3.09–161.97
PTV_6000	Pre-correction	166.75	66.79	40.70–333.05
	Post-correction	147.16	61.98	33.99–299.74
PTV_5600	Pre-correction	745.13	155.04	364.14–1,108.09
	Post-correction	650.69	141.54	311.18–988.26

GTV, gross tumor volume; CTV, clinical target volume; PTV_7000, the PTV of gross tumor volume; PTV_6000, the PTV of high-risk regions; PTV_5600, the PTV of low-risk regions; SD, standard deviation.

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