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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
  1. Abbreviations; FFE fast field echo, SPGR spoiled gradient-recalled acquisition, SPIR spectral presaturation with inversion recovery, ProSet principle of selective excitation technique, FOV field of view, TE echo time, TR repetition time, BW bandwidth, NEX number of excitations