Dosimetric comparison and biological evaluation of fixed-jaw intensity-modulated radiation therapy for T-shaped esophageal cancer

Table 7 MUs, delivery time and γ passing rate

	JT IMRT	SJ IMRT	JT VMAT	FJ IMRT	ANOVA p value	Post hoc p value
	JT IMRT	SJ IMRT	JT VMAT	FJ IMRT	ANOVA p value	FJ IMRT versus JT IMRT	FJ IMRT versus SJ IMRT	FJ IMRT versus JT VMAT
MUs	937 ± 194	713 ± 137	517 ± 59	888 ± 99	< 0.001	0.122	< 0.001	< 0.001
Delivery time (s)	522 ± 5.6	488.8 ± 45.2	263.7 ± 43.3	516.1 ± 54.7	< 0.001	0.610	0.021	< 0.001
γ passing rate (%)	96.3 ± 2.1	96.0 ± 1.5	95.8 ± 2.4	96.9 ± 1.7	0.456	0.891	0.769	0.335

All values are shown as the mean ± standard deviation
MU, Monitor unit; JT IMRT, jaw-tracking intensity-modulated radiation therapy; SJ IMRT, static jaw intensity-modulated radiation therapy; JT VMAT, jaw-tracking volumetric modulated arc therapy; FJ IMRT, fixed-jaw intensity-modulated radiation therapy

ISSN: 1748-717X