Table 4. Comparison of VNC images derived from low-dose and full-dose contrast images.
| Item | VNClow | VNCfull | TNC | P value |
|---|---|---|---|---|
| VMC | ||||
| AAO | 3.48±9.16*† | 21.10±12.94* | −4.40±16.28 | <0.001 |
| DAO | −0.04±9.27 | 22.58±12.96* | −4.73±11.92 | <0.001 |
| AA | 1.45±7.00*† | 25.57±11.63* | −6.15±9.01 | <0.001 |
| VMR | ||||
| AAO | 1.17±0.33 | 1.92±0.81* | 1.00±0.41 | <0.001 |
| DAO | 1.02±0.26 | 1.79±0.61* | 0.93±0.21 | <0.001 |
| AA | 1.04±0.17*† | 1.65±0.32* | 0.89±0.16 | <0.001 |
| VMP | ||||
| AAO | 0.17±0.33 | 0.92±0.81* | 0.01±0.41 | <0.001 |
| DAO | 0.02±0.61 | 0.79±0.61* | −0.06±0.21 | <0.001 |
| AA | 0.44±0.17*† | 0.62±0.32* | −0.01±0.16 | <0.001 |
Data are presented as the mean ± standard deviation. *, significant difference from the TNC group; †, significant difference from the VNCfull group. TNC, true noncontrast; VNC, virtual noncontrast; VMC, vessel-muscle contrast; AAO, ascending aorta; DAO, descending aorta; AA, abdominal aorta; VMR, vessel:muscle ratio; VMP, vessel-muscle percentage.