Table 2.

IF‐CBCT shifts

Parameter	DIBH (n = 8)	EEBH (n = 22)	p‐value
Number of images	48	156
Number of images shifted (≥ 0.2 cm)	11 (22.9%)	28 (17.9%)	0.36
Mean Sup‐Inf shift (cm) (range)	0.2 (0–0.3)	0.22 (0–0.6)	0.66
Mean Left‐Right shift (cm) (range)	0.15 (0–0.2)	0.16 (0–0.2)	0.84
Mean Ant‐Post shift (cm) (range)	0.18 (0–0.2)	0.16 (0–0.4)	0.38
Number of IF‐CBCT shifts ≥ 0.2cm Sup‐Inf Left‐Right Ant‐Post	DIBH and EEBH combined 31 (33.4%) 10 (17.2%) 17 (29.3%)

Ant, anterior; DIBH, deep‐inspiration breath hold; EEBH, end‐exhalation breath hold; IF‐CBCT, Intrafraction cone beam computed tomography; Inf, inferior; Post, posterior; SD, standard deviation; Sup, superior.