DE-MR simulation imaging for prone radiotherapy after breast-conserving surgery: assessing its application in lumpectomy cavity delineation based on deformable image registration

Table 6 Difference of the parameters between the different breast volume groups

	LC_CT–LC_T2 (Median)			LC_CT–LC_2T1 (Median)			LC_CT–LC_5T1 (Median)			LC_CT–LC_10T1 (Median)
breast volume (cm³)	CI	DI	COM (cm)	CI	DI	COM (cm)	CI	DI	COM (cm)	CI	DI	COM (cm)
≥ 550	0.461	0.617	0.428	0.425	0.678	0.432	0.464	0.600	0.601	0.506	0.670	0.339
< 550	0.410	0.646	0.577	0.441	0.711	0.559	0.449	0.695	0.539	0.425	0.667	0.517
P	0.728	0.810	0.979	0.437	0.936	0.437	0.611	0.437	0.769	0.679	0.953	0.513

CI conformal index, DI degree of inclusion, COM the distance between the center of mass of the targets, LC_CT the LC delineated based on CT simulation images, LC_T2 the LC delineated based on T2WI LC_2T1 the LC delineated based on 2nd min DE-TIWI, LC_5T1 the LC delineated based on 5th min DE-TIWI, LC_10T1 the LC delineated based on 10th min DE-TIWI

ISSN: 1748-717X