Table 2.

Pediatric patient positioning with a baby cradle or vacuum cushion: comparison of table height deviation for radiographers and 3D camera

Body part	Abdomen	Head	Thorax-abdomen	Thorax	All body parts combined
Total number of patients with a baby cradle or vacuum cushion	3 (7%)	20 (48%)	2 (5%)	17 (40%)	42 (100%)
Table height determined by radiographers
Median of absolute table height deviation, mm	8.7 [1.1]	9.1 [12.9]	8.0 [3.1]	15.3 [15.8]	9.2 [13.7]
Patients positioned higher than isocenter, n (%)	1 (33%)	4 (15%)	1 (50%)	6 (41%)	12 (29%)
Patients positioned lower than isocenter, n (%)	2 (67%)	17 (85%)	1 (50%)	10 (59%)	30 (71%)
Largest deviation, mm (age in months)	10.3 (12 M)	− 32.8 (3 M)	11.1 (2 M)	− 42.4 (48 M)
Table height determined by 3D camera
Median of absolute table height deviation, mm	10.8 [8.3]	10.2 [15.3]	17.4 [16.0]	15.2 [15.0]	10.9 [16.6]
Patients positioned higher than isocenter, n (%)	2 (67%)	18 (85%)	1 (50%)	7 (47%)	28 (67%)
Patients positioned lower than isocenter, n (%)	1 (33%)	3 (15%)	1 (50%)	9 (53%)	14 (33%)
Largest deviation, mm (age in months)	− 23.3 (72 M)	− 67.1 (23 M)	33.4 (2 M)	− 46.4 (5 M)
p value median absolute table height deviation (3D camera versus radiographer)	0.593	0.167	0.655	0.850	0.105

Data are numbers (%) and median [interquartile range]

Negative deviation numbers: patient positioned higher than isocenter

Positive deviation numbers: patient positioned lower than isocenter