Summary of SNR and CNR Results
| Images | SNR | CNR | |||
|---|---|---|---|---|---|
| GM | WM | GM-WM | Lesion-GM | Lesion-WM | |
| Source | |||||
| MP Rage | 23.1 ± 5.2 | 27.8 ± 5.0 | 4.8 ± 1.5 | 16.3 ± 10.2 | 11.8 ± 10.3 |
| VIBE | 26.1 ± 5.4 | 32.0 ± 6.3 | 5.9 ± 2.2 | 20.2 ± 11.3 | 14.3 ± 12.0 |
| P value | .001 | <.001 | <.001 | .002 | .053 |
| 5-mm Reformations | |||||
| MP RAGE | 73.8 ± 14.6 | 89.2 ± 15.1 | 15.4 ± 4.1 | 38.9 ± 26.3 | 25.1 ± 26.1 |
| VIBE | 77.5 ± 14.5 | 94.2 ± 16.3 | 16.8 ± 4.4 | 46.1 ± 26.4 | 30.0 ± 28.3 |
| T1-weighted SE | 96.1 ± 11.0 | 106.4 ± 10.1 | 10.2 ± 4.9 | 64.1 ± 37.9 | 54.1 ± 39.1 |
| P value* | <.001† | <.001† | <.001† | <.001‡ | <.001† |
Note.—Data are mean ratios ± SD.
↵* P values are based on analysis of variance.
↵† Paired Student t test demonstrated no significant difference between 5-mm VIBE and MP RAGE reformations.
↵‡ Student t test demonstrated a statistically significant difference between each pairing of images obtained with the three imaging methods.