Radiation exposure for screw implantation.
| Variable | Group, mean ± SD (range) | P | |
| O-Arm | Surgivisio | ||
| 2D imaging duration, sec | 4 ± 3 (1–19) | 109 ± 45 (37–250) | <0.01 |
| No. of 3D acquisitions/patient | 1.1 ± 0.27 (1–2) | 1.6 ± 0.83 (1–5) | <0.01 |
| DLP, mGy.cm | 345 ± 161 (88–837) | - | - |
| Overall DAP, mGy.cm2 | - | 9664 ± 6978 (2000–29,276) | - |
| DAP related to 2D, mGy.cm2 | 1167 ± 1111 (181–5645) | 4209 ± 4042 (406–25,365) | <0.01 |
| Overall E, mSv | 5.43 ± 2.53 (1.42–13.20) | 2.70 ± 2.32 (0.60–12.74) | <0.01 |
| E per level, mSv | 2.65 ± 1.46 (0.52–6.88) | 1.02 ± 0.87 (0.15–3.87) | <0.01 |
| E 2D, mSv | 0.26 ± 0.24 (0.04–1.41) | 1.16 ± 1.18 (0.12–6.88) | <0.01 |
| E 3D, mSv | 5.17 ± 2.42 (1.23–12.56) | 1.54 ± 1.47 (0.33–8.54) | <0.01 |
| E per 3D acquisition, mSv | 4.79 ± 2.03 (1.23–12.56) | 0.90 ± 1.06 (0.11–6.60) | <0.01 |
| E 2D calculated with w, mSv | 0.30 ± 0.29 (0.05–1.47) | 1.05 ± 1.06 (0.11–6.60) | <0.01 |
| AR, % | 2.7 × 10−4 ± 1.3 × 10−4 (6.4 × 10−5 to 6.7 × 10−4) | 1.4 × 10–4 ± 1.2 × 10−4 (3.0 × 10−5 to 6.3 × 10−4) | <0.01 |
Abbreviations: AR, absolute risk of radiation-induced cancer; 2D, 2-dimensional; 3D, 3-dimensional; DAP, dose area product; DLP, dose length product; E, effective dose.
Note: Boldface indicates statistically significant findings.