Table 2. Healthy Subjects.
Image quality scores for the navigated and breath-held 3D-SPGR acquisitions. 46 paired comparisons were possible because navigated and breath-held acquisitions were alternated in all 8 subjects for approximately 30 minutes following injection in order to determine optimal timing for hepatobiliary phase imaging. While the mean image quality score for the navigated acquisition was higher than for the breath-held acquisition, this difference did not quite reach statistically significant (p=0.09).
| Image Quality | ||||||
|---|---|---|---|---|---|---|
| 0 | 1 | 2 | 3 | Mean Score | Preferred | |
| Navigator-gated | 0 | 5 | 24 | 17 | 2.26 ± 0.65 | 63% |
| Breath-held | 0 | 8 | 27 | 11 | 2.07 ± 0.65 | 11% |
0 = non-diagnostic
1 = severe artifact
2 = very mild artifact
3 = no significant artifact