Table 8.
Comparison of 7 T/3 T SNRs Calculated From Phantom and In Vivo Estimations
| 7 T/3 T SNRs |
|||||||
|---|---|---|---|---|---|---|---|
| Phantom | Volunteers | Patients Analyzed as Volunteers | Epilepsy | Multiple Sclerosis | Tumor | Vascular Disease | |
| T1 MP2RAGE 3D | 0.8 | 0.8 | 0.9 | 0.8 | 0.7 | 0.9 | 0.9 |
| T2 TSE 2D | 2.2 | 2.0 | 1.8 | 1.7 | 2.2 | 1.7 | 2.0 |
| FLAIR TSE 2D | 1.5 | 1.1 | 1.2 | 1.1 | 1.2 | 1.0 | 1.1 |
| T2* GRE | 2.5 | 3.9 | 3.6 | 3.1 | 3.6 | 3.8 | 4.4 |
| f MRI | 1.3 | 1.7 | |||||
| T2 SPACE 3D | 1.4 | 1.3 | 1.3 | 1.3 | 1.4 | 1.5 | 1.7 |
| FLAIR SPACE 3D | 2.1 | 2.2 | 2.3 | 2.3 | 2.0 | 1.9 | 2.5 |
| DWI single shot | 2.5 | 2.0 | 1.8 | 1.9 | 1.6 | 1.2 | |
| DWI RESOLVE | 1.9 | 1.9 | 1.7 | 2.0 | 2.0 | 1.4 | |
| T1 FLASH | 4.2 | 1.9 | 1.9 | 2.3 | 2.1 | 1.8 | 1.8 |
| DIR SPACE 3D | 4.2 | 3.9 | 3.4 | 2.9 | 2.7 | 2.9 | 2.8 |
SNR indicates signal-to-noise; 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; f MRI, 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.