Contrast enhancement and aortic artefact grades for the high-pitch versus standard-pitch groups
| High-pitch (n=44) | Standard-pitch (n=51) | p Value | |
| Contrast enhancement (mean±SD), Hounsfield units | |||
| Aortic root | 455±161 | 464±123 | 0.760 |
| Distal aorta | 491±193 | 362±74 | <0.001 |
| Contrast to noise ratio (mean±SD) | |||
| Aortic root | 18.0±3.98 | 26.1±6.52 | <0.001 |
| Distal aorta | 14.2±5.72 | 16.7±4.93 | <0.001 |
| Aortic artefact grade, n (%) | |||
| 1 | 0 (0) | 0 (0) | 0.340 |
| 2 | 13 (29.5) | 11 (21.36) | |
| 3 | 31 (70.5) | 40 (78.4) | |