. 2019 Jul 1;104(3):685–693. doi: 10.1016/j.ijrobp.2019.03.003

Table 2.

Pairwise interobserver contour agreement and confidence from Experienced observer cohort (3 observers)

	DSC	MCCD (mm)	Observer rating
CBCT	0.82 (0.13)	2.94 (1.58)	4 (4)
US	0.81 (0.14)	2.25 (2.67)^∗	7 (3)^∗
CBCT-US fusion	0.87 (0.07)^†	1.63 (0.63)^†	8 (2)^†

Abbreviations: CBCT = cone beam computed tomography; DSC = Dice similarity coefficient; MCCD = mean contour-to-contour distance; US = ultrasound.

Median and interquartile range results from the pairwise analysis from the 3 observers in the Experienced cohort for (column 1) the DSC, (column 2) the MCCD, and (column 3) observer ratings of contour confidence (1 = extremely unconfident and 10 = extremely confident). Symbols indicate significant differences (P < .005) between imaging modalities within a column.

^∗

Significant difference between CBCT and US.

^†

CBCT-US fusion is significantly different from both CBCT and US.