Table 1 MR imaging parameters
From: T1rho and T2 relaxation times of the normal adult knee meniscus at 3T: analysis of zonal differences
Imaging parameters | b-FFE T1rho | SPGR T1rho | T2 |
|---|---|---|---|
Mode | 3D | 3D | 2D |
Sequence | balanced FFE | SPGR | TSE |
Plane | sagittal | sagittal | sagittal |
Fat sat | SPIR | ProSet | No |
Matrix | 304 × 302 | 388 × 252 | 388 × 319 |
Number of slices | 31 | 31 | 31 |
FOV (mm) | 140 × 140 | 140 × 140 | 140 × 140 |
Slice thickness (mm) | 3.0 | 3.0 | 3.0 |
Slice gap (mm) | 0.0 | 0.0 | 0.0 |
Flip angle | 25 | 10 | 90 |
TE (ms) | 2.4 | 3.4 | 13/26/39/52/65/78/91 (7-TE) |
TR (ms) | 4.8 | 6.4 | 2700 |
BW (Hz/pixel) | 606 | 475 | 243 |
Echo train length | 154 | 64 | 7 |
NEX | 1 | 1 | 1 |
Effective inplane spatial resolution (mm) | 0.27 × 0.27 | 0.27 × 0.27 | 0.27 × 0.27 |
Acceleration factor | 2 | 2 | 2.2 |
Spin-lock frequency (Hz) | 575 | 575 | N.A. |
Time of spin-lock (TSL) (ms) | 20/40/60/80 | 20/40/60/80 | N.A. |
Acquisition time | 3:57 × 4 | 4:09 × 4 | 13:25 |