Table 7.
SNR and CNR Summary Statistics (Mean and Standard Deviation Over 2 Readers) and Adjusted SNR Values (SNR adj)
| Tumor |
Vascular Disease |
||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| SNR, Mean | SNR, SD | CNR, Mean | CNR, SD | SNR adj | SNR, Mean | SNR, SD | CNR, Mean | CNR, SD | SNR adj | ||
| T1 MP2RAGE 3D | 3 T | 51.4 | 14.7 | 29.5 | 14.3 | 51.4 | 44.9 | 14.8 | 30.7 | 12.2 | 44.9 |
| 7 T | 32.3 | 10.9 | 20.2 | 11.5 | 46.0 | 27.4 | 9.7 | 19.9 | 8.1 | 39.0 | |
| T2 TSE 2D | 3 T | 18.7 | 4.7 | 40.7 | 27.7 | 18.7 | 16.3 | 8.1 | 34.7 | 25.3 | 16.3 |
| 7 T | 12.5 | 2.5 | 24.2 | 13.3 | 32.6 | 12.8 | 5.6 | 29.1 | 20.8 | 33.4 | |
| FLAIR TSE 2D | 3 T | 23.6 | 6.2 | 34.4 | 37.0 | 23.6 | 20.7 | 5.5 | 17.4 | 3.9 | 20.7 |
| 7 T | 14.4 | 4.3 | 18.0 | 11.5 | 24.0 | 13.4 | 2.6 | 16.7 | 11.3 | 22.4 | |
| T2* GRE | 3 T | 31.6 | 13.7 | 12.9 | 13.2 | 31.6 | 32.0 | 23.1 | 8.3 | 5.3 | 32.0 |
| 7 T | 15.7 | 4.6 | 4.8 | 2.8 | 121.1 | 18.3 | 8.5 | 6.9 | 4.6 | 141.2 | |
| T2 SPACE 3D | 3 T | 19.5 | 8.8 | 17.7 | 11.6 | 19.5 | 17.3 | 6.8 | 17.1 | 9.4 | 17.3 |
| 7 T | 25.7 | 11.3 | 21.0 | 14.7 | 28.5 | 26.8 | 11.8 | 13.0 | 11.4 | 29.8 | |
| FLAIR SPACE 3D | 3 T | 30.8 | 9.9 | 15.9 | 7.8 | 30.8 | 27.7 | 10.6 | 16.7 | 12.6 | 27.7 |
| 7 T | 26.3 | 13.6 | 8.0 | 7.5 | 59.0 | 31.0 | 7.6 | 13.0 | 13.2 | 69.7 | |
| DWI single shot | 3 T | 15.3 | 3.3 | 19.1 | 11.0 | 15.3 | 16.1 | 4.7 | 17.1 | 8.4 | 16.1 |
| 7 T | 15.1 | 4.3 | 17.4 | 10.4 | 25.2 | 11.3 | 4.7 | 11.4 | 5.8 | 18.9 | |
| DWI RESOLVE | 3 T | 12.6 | 4.3 | 15.7 | 10.9 | 12.6 | 13.6 | 2.9 | 12.6 | 5.6 | 13.6 |
| 7 T | 9.7 | 2.8 | 11.5 | 4.3 | 25.3 | 7.3 | 1.5 | 8.4 | 2.2 | 19.0 | |
| T1 FLASH | 3 T | 71.2 | 11.2 | 24.4 | 26.0 | 71.2 | 71.8 | 29.0 | 18.2 | 11.8 | 71.8 |
| 7 T | 60.0 | 21.7 | 10.3 | 11.3 | 125.1 | 63.4 | 31.3 | 7.0 | 5.0 | 132.1 | |
| DIR SPACE 3D | 3 T | 8.7 | 2.8 | 29.1 | 22.3 | 8.7 | 11.3 | 6.0 | 19.6 | 7.1 | 11.3 |
| 7 T | 12.5 | 6.4 | 18.3 | 11.8 | 25.0 | 15.6 | 5.3 | 20.0 | 20.1 | 31.2 | |
Patient SNR and CNR results were grouped by pathology.
SNR indicates signal-to-noise; CNR, contrast-to-noise ratio; MP2RAGE, magnetization prepared rapid acquisition gradient echo sequence with bias field correction; T2 TSE 2D, 2D turbo spin echo; FLAIR TSE 2D, 2D FLAIR TSE; T2* GRE, T2*-weighted gradient echo sequence; fMRI, functional MRI; T2 SPACE 3D, 3D T2-weighted TSE with variable flip angle; FLAIR SPACE 3D, 3D FLAIR TSE with variable flip angle; DWI single shot, single-shot diffusion-weighted imaging EPI; DWI RESOLVE, multishot readout-segmented diffusion-weighted EPI with 2D navigator correction; T1 FLASH, T1-weighted spoiled gradient echo sequence; DIR SPACE 3D, 3D double inversion recovery TSE with variable flip angle.