Impact evaluation of intra-fractional variation on online adaptive radiotherapy for postoperative cervical and endometrial cancer

Table 1 Comparison of target volume and organs at risk contours before and after treatment

Region	ASD (mm)	DSC	95% HD (mm)	Posterior-anterior (mm)	Left-right (mm)	Superior-inferior (mm)
CTV-N	0.83 ± 0.33	0.9 ± 0.09	3.94 ± 1.17	0.75 ± 1.05	-0.14 ± 1.31	-0.71 ± 6.69
CTV-V	1.69 ± 0.74	0.8 ± 0.11	6.42 ± 2.45	0.46 ± 2.58	-0.11 ± 1.42	-0.58 ± 7.27
Bladder	1.75 ± 1.02	0.91 ± 0.04	7.24 ± 3.92	0.34 ± 2.01	-0.20 ± 1.09	-1.02 ± 5.57
Rectum	1.71 ± 1.09	0.81 ± 0.08	7.67 ± 4.54	0.17 ± 2.09	0.27 ± 1.59	1.38 ± 8.12
Bowel	3.56 ± 1.79	0.6 ± 0.25	18.8 ± 14	-3.99 ± 4.17	0.29 ± 6.07	1.47 ± 31.08

Positive values of centroid deviation indicate shifts towards the inferior, right, and anterior directions, while negative values reflect superior, left, and posterior shifts. ASD: Average surface distance; DSC: Dice similarity coefficient; HD: Hausdorff distance; CTV-N: Novel clinical target volume; CTV-V: Clinical target volume that includes the proximal vagina and any paravaginal tissue.