Table 4 Acquisition Parameters of MR sequences.
PDW | T1 | T1ρ | T2 | T2* | |
|---|---|---|---|---|---|
Sequence Type | Turbo spin echo | Inversion recovery | Spin-lock multi-gradient echo | Multi-spin echo | Multi-gradient echo |
Repetition Time [ms] | 4049 | 3000 | 30 | 1000 | 700 |
Ech time [ms] | 15 | 7.2 | 3.1 | n × 9.01 (n = 1–8) | 2.84 + n × 4.54 (n = 0–9) |
Turbo spin-echo factor | 14 | 5 | 64 | 8 | 10 |
Field of view [mm] | 160 × 160 | 30 × 30 | 30 × 30 | 30 × 30 | 30 × 30 |
Acquisition matrix | 400 × 302 | 64 × 64 | 64 × 64 | 64 × 64 | 64 × 64 |
Reconstruction matrix | 512 × 512 | 80 × 80 | 80 × 80 | 80 × 80 | 80 × 80 |
Flip angle [°] | 90 | 90 | 11 | 90 | 55 |
Number of signal averages | 1 | 2 | 4 | 3 | 8 |
Slices | 28 | 1 | 1 | 1 | 1 |
Slice Thickness/Gap [mm] | 3.0/3.3 | 2.0/n/a | 3.2/n/a | 2.0/n/a | 2.0/n/a |
Inversion times [ms] | n/a | 150, 300, 500, 800, 1000, 1300, 1500 | n/a | n/a | n/a |
Spin-lock durations [ms] | n/a | n/a | 0, 10, 20, 30, 40 | n/a | n/a |
Duration [min] | 4.3 | 9.1 | 7.4 | 3.3 | 6.0 |
