Effective radiation dose: CTCA versus invasive CA
| BMI | CTCA | CA | p Value | |||||
| No | Current (mA) | Voltage (kV) | DLP (mGy × cm) | Radiation dose (mSv) | DAP (mGy × cm2) | Radiation dose (mSv) | ||
| All patients | 42 | 122.4 (42.1) | 2.1 (0.7) | 38.7 (20.1) | 8.5 (4.4) | <0.001* | ||
| <22.5 kg/m2 | 5 | 450 | 100 | 69.8 (10.1) | 1.2 (0.2) | 24.9 (20.5) | 5.5 (4.5) | 0.008* |
| 22.5–24.9 kg/m2 | 15 | 500 | 100 | 86.5 (13.3) | 1.5 (0.2) | 33.0 (15.6) | 7.3 (3.4) | <0.001* |
| 25–27.4 kg/m2 | 6 | 550 | 120 | 152.6 (0.3) | 2.6 (0.0) | 42.2 (22.9) | 9.3 (5.0) | 0.002* |
| 27.5–30 kg/m2 | 11 | 600 | 120 | 155.4 (19.7) | 2.6 (0.3) | 39.5 (15.5) | 8.7 (3.4) | <0.001* |
| >30 kg/m2 | 5 | 650 | 120 | 173.8 (22.5) | 3.0 (0.4) | 63.4 (21.3) | 14.0 (4.7) | 0.008* |
*Bonferroni-adjusted level of significance was p<0.0083.
BMI, body mass index; CTCA, computed tomography coronary angiography; DAP, dose-area product; DLP, dose-length product; ICA, invasive coronary angiography.