Table 1.
Details of the contrast medium specifics
| Phantom size | Scan parameter tube voltage: | Constant CTDI | Dose modulation | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 70 kVp | 80 kVp | 100 kVp | 120 kVp | 140 kVp | 70 kVp | 80 kVp | 100 kV | 120 kV | 140 kV | ||
| Large | Rotation time (s) | 1 | 1 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 |
| mAs (range 80–500) | 500 | 395 | 405 | 250 | 170 | 499 | 499 | 464 | 372 | 282 | |
| CTDIvol (mGy) | 13.17 | 16.6 | 16.68 | 16.6 | 16.43 | 6.59 | 10.11 | 14.79 | 16.6 | 17.59 | |
| Medium | Rotation time (s) | 1 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 |
| mAs (range 80–500) | 380 | 475 | 240 | 150 | 105 | 499 | 499 | 322 | 244 | 178 | |
| CTDIvol (mGy) | 10 | 9.98 | 9.89 | 9.96 | 10.15 | 6.09 | 8.14 | 8.98 | 10 | 11.6 | |
| Small | Rotation time (s) | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 |
| mAs (range 80–500) | 500 | 330 | 170 | 105 | 70 | 484 | 630 | 219 | 106 | 123 | |
| CTDIvol (mGy) | 6.59 | 6.93 | 7.00 | 6.97 | 6.77 | 4.67 | 5.18 | 5.73 | 7.05 | 8.75 | |
CTDIvol Volume computed tomography dose index. Scan technique: constant CTDIvol and dose modulation (SmartmA) using conventional, iterative reconstruction. Additional parameters: scan mode, helical; detector collimation, 80 × 0.625; pitch, 0.5; scan field of view, 50 cm; display field of view, 36 cm; reconstructed slice thickness, 2.5 mm; reconstruction kernel, standard; iterative reconstruction, adaptive statistical iterative reconstruction, ASIR-V 50%; noise index14.5 (scans with dose modulation)