Table 1.

Interfractional volume changes and shape variations as quantified by Dice Similarity Coefficient (DSC).

Structure	Volume Change (%)				DSC
	Mean	Median	Q1	Q3	Mean	Median	Q1	Q3
CTV	4.9	3.0	−3.0	11.5	0.81	0.83	0.79	0.88
Bladder	−14.8	−24.5	−34.6	14.5	0.76	0.79	0.74	0.82
Rectum	3.9	5.4	−9.7	20.7	0.72	0.73	0.67	0.79

CTV: clinical target volume; DSC: Dice Similarity Coefficient; Q1: 1st quartile; Q3: 3rd quartile.