Table 1.
MR parameters for in vivo study
| Scanner 1 | Scanner 2 | |||
|---|---|---|---|---|
| Standard SNR | High SNR | Standard SNR | High SNR | |
| TR [ms] | 14.4 | 12.1 | 15.1 | 12 |
| Number of echoes | 6 | 6 | 6 | 6 |
| Minimum and maximum TE [ms] | 1.2, 11.4 | 1.1, 10.5 | 1.2, 11.4 | 1.1, 10.4 |
| Matrix | 256 × 160 | 128 × 120 | 224 × 144 | 128 × 128 |
| Field of view [cm] | 42 | 42 | 45 | 45 |
| Slice thickness [mm] | 8 | 10 | 8 | 10 |
| Flip angle | 5° | 5° | 5° | 5° |
| Number of slices* | 32 | 24 | 32 | 28 |
| Bandwidth | 125 | 50 | 100 | 50 |
| Partial ky acquisition | 90% | 80% | 80% | 80% |
| Autocalibrated parallel imaging | ×2.65 | - | ×2.33 | - |
| Voxel size [mm3] | 35 | 115 | 50 | 124 |
| Estimated SNR | 23.7 ± 2.0 | 78.3 ± 6.2 | 52.3 ± 5.1 | 142.6 ± 9.8 |
Autocalibrated parallel imaging is expressed as the actual acceleration in acquisition time. signal-to-noise ratio (SNR) was estimated by Monte-Carlo based pseudo-multiple replica method (42). TR, repetition time; TE: echo time.