Radiation exposure data comparison in the 2 groups.
| Radiation Exposure, mean ± SD (range) | Group A (n = 43) | Group B(n = 27) | P Valuea |
| 2D Imaging duration, s | 23.67 ± 15.32 (9.70–84.87) | 17.82 ± 10.01 (2.82–46.07) | 0.06 |
| 2D Imaging duration/level, s | 18.56 ± 10.40 (4.41–62.61) | 12.93 ± 8.49 (1.95–42.30) | 0.02 |
| Number of 3D acquisitions/patient | 1.5 ± 1.0 (1–5) | 1.4 ± 0.9 (1–4) | 0.72 |
| Dose length product, mGy·cm | 534 ± 385 (175–1975) | 271 ± 165 (88–769) | <0.01 |
| Dose area product, mGy·cm2 | 9173 ± 10,430 (1298–63,331) | 1614 ± 1656 (332–9070) | <0.01 |
| Overall E, mSv | 9.94 ± 6.67 (2.76–31.48) | 4.34 ± 2.52 (1.41–11.33) | <0.01 |
| E per level, mSv | 7.65 ± 4.82 (1.39–19.69) | 2.97 ± 1.42 (0.49–5.67) | <0.01 |
| E2D, mSv | 2.12 ± 2.66 (0.25–16.47) | 0.37 ± 0.33 (0.06–1.72) | <0.01 |
| E3D, mSv | 7.82 ± 5.67 (2.46–29.63) | 3.97 ± 2.34 (1.23–10.77) | <0.01 |
| E per 3D acquisition, mSv | 5.60 ± 3.14 (2.46–12.56) | 2.90 ± 0.80 (1.23–4.12) | <0.01 |
| Absolute risk of radiation-induced cancer equivalent to a whole-body exposure, % | 5.0 × 10−4 ± 3.3 × 10−4 (1.4 × 10−4–1.6 × 10−3) | 2.2 × 10−4 ± 1.3 × 10−4 (7.1 × 10−5–5.7 × 10−4) | <0.01 |
Abbreviations: 2D, 2-dimensional; 3D, 3-dimensional; E, effective dose.
↵a Student t test.