3.

施源器处理前后对配准精度的影响

Registration precision before and after removing the applicators

Structure	Regions	With applicators	Without applicators	Statistical difference
	S	0.722±0.112	0.699±0.104	t=2.209, P=0.044
HRCTV	M	0.688±0.124	0.689±0.125	t=-0.094, P=0.926
	L	0.607±0.115	0.647±0.142	t=-3.179, P=0.007
	S	0.764±0.098	0.777±0.090	t=-1.185, P=0.256
IRCTV	M	0.743±0.099	0.747±0.096	t=-0.780, P=0.448
	L	0.6987±0.118	0.703±0.123	t=-0.825, P=0.423
	S	0.689±0.221	0.686±0.213	t=3.363, P=0.722
Bladder	M	0.786±0.201	0.755±0.214	t=-1.311, P=0.211
	L	0.737±0.204	0.724±0.208	t=-1.034, P=0.319
	S	0.616±0.190	0.621±0.190	t=-1.405, P=0.182
Rectum	M	0.664±0.152	0.679±0.156	t=-5.051, P=0.000
	L	0.585±0.194	0.598±0.186	t=-2.795, P=0.014