Table 1.
Pediatric patient positioning without 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 without a baby cradle or vacuum cushion | 22 (15%) | 46 (31%) | 14 (9%) | 67 (45%) | 149 (100%) |
| Table height determined by radiographers | |||||
| Median of absolute table height deviation, mm | 10.2 [16.8] | 16.4 [16.6] | 4.1 [5.1] | 9.7 [9.7] | 10.3 [12.6] |
| Patients positioned higher than isocenter, n (%) | 5 (23%) | 15 (33%) | 2 (14%) | 19 (28%) | 41 (28%) |
| Patients positioned lower than isocenter, n (%) | 17 (77%) | 31 (67%) | 12 (86%) | 48 (72%) | 108 (72%) |
| Largest deviation, mm (age in years) | 80.5 (13 years) | 44.9 (3 years) | 31.1 (12 years) | 54.3 (11 years) | |
| Table height determined by 3D camera | |||||
| Median of absolute table height deviation, mm | 3.1 [4.7] | 3.9 [6.3] | 2.2 [4.3] | 4.8 [6.7] | 3.7 [5.8] |
| Patients positioned higher than isocenter, n (%) | 8 (36%) | 22 (48%) | 6 (43%) | 33 (49%) | 69 (46%) |
| Patients positioned lower than isocenter, n (%) | 14 (64%) | 24 (52%) | 8 (57%) | 34 (51%) | 80 (54%) |
| Largest deviation, mm (age in years) | 18.2 (15 years) | − 30.1 (10 years) | − 13.5 (13 years) | − 25.4 (3 years) | |
| p value median absolute table height deviation (3D camera versus radiographer) | < 0.005 | < 0.005 | 0.064 | < 0.005 | < 0.005 |
Data are numbers (%) and median [interquartile range]
Negative deviation numbers: patient positioned higher than isocenter
Positive deviation numbers: patient positioned lower than isocenter