Table 6.
SNR and CNR Summary Statistics (Mean and Standard Deviation Over 2 Readers) and Adjusted SNR Values (SNR adj)
| Epilepsy |
Multiple Sclerosis |
||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | 60.6 | 23.6 | 30.0 | 20.5 | 60.6 | 61.4 | 25.1 | 35.3 | 12.9 | 61.4 |
| 7 T | 33.8 | 10.2 | 20.4 | 8.7 | 48.1 | 32.1 | 5.2 | 21.0 | 5.5 | 45.7 | |
| T2 TSE 2D | 3 T | 21.6 | 5.2 | 31.3 | 30.8 | 21.6 | 20.2 | 4.3 | 23.8 | 8.3 | 20.2 |
| 7 T | 13.9 | 4.0 | 24.7 | 13.8 | 36.3 | 17.2 | 5.8 | 22.3 | 10.8 | 44.8 | |
| FLAIR TSE 2D | 3 T | 24.7 | 10.4 | 11.1 | 6.2 | 24.7 | 23.5 | 7.6 | 20.6 | 7.0 | 23.5 |
| 7 T | 16.5 | 7.6 | 13.4 | 5.6 | 27.6 | 16.9 | 5.1 | 18.9 | 12.0 | 28.2 | |
| T2* GRE | 3 T | 50.4 | 29.3 | 7.4 | 5.3 | 50.4 | 53.0 | 13.1 | 7.7 | 5.0 | 53.0 |
| 7 T | 20.1 | 5.4 | 2.8 | 2.2 | 154.9 | 24.7 | 5.7 | 4.2 | 2.6 | 190.8 | |
| T2 SPACE 3D | 3 T | 27.5 | 7.7 | 20.0 | 14.9 | 27.5 | 25.6 | 9.4 | 12.5 | 4.0 | 25.6 |
| 7 T | 32.4 | 8.7 | 17.9 | 18.7 | 36.0 | 32.2 | 16.0 | 13.6 | 9.2 | 35.8 | |
| FLAIR SPACE 3D | 3 T | 30.7 | 11.3 | 14.4 | 8.7 | 30.7 | 31.5 | 10.7 | 13.4 | 5.8 | 31.5 |
| 7 T | 30.9 | 8.7 | 11.7 | 7.0 | 69.5 | 28.3 | 11.7 | 10.3 | 9.1 | 63.5 | |
| DWI single shot | 3 T | 17.8 | 5.7 | 14.2 | 9.9 | 17.8 | 17.8 | 3.7 | 10.9 | 3.7 | 17.8 |
| 7 T | 19.3 | 8.0 | 18.3 | 14.9 | 32.2 | 20.8 | 9.7 | 12.6 | 5.6 | 34.7 | |
| DWI RESOLVE | 3 T | 17.6 | 3.6 | 12.6 | 14.5 | 17.6 | 16.0 | 2.9 | 9.3 | 2.6 | 16.0 |
| 7 T | 11.4 | 3.8 | 11.9 | 8.0 | 29.9 | 12.2 | 4.9 | 7.7 | 3.0 | 31.7 | |
| T1 FLASH | 3 T | 69.1 | 18.5 | 11.2 | 8.7 | 69.1 | 77.8 | 15.3 | 8.5 | 3.5 | 77.8 |
| 7 T | 75.2 | 40.8 | 10.6 | 7.2 | 156.7 | 76.6 | 29.8 | 8.3 | 8.7 | 159.5 | |
| DIR SPACE 3D | 3 T | 13.8 | 4.3 | 16.4 | 8.9 | 13.8 | 12.3 | 5.5 | 35.5 | 15.5 | 12.3 |
| 7 T | 19.9 | 8.8 | 12.4 | 9.9 | 39.8 | 16.9 | 6.9 | 23.5 | 14.6 | 33.7 | |
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.