Table 1.

MR imaging parameters

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

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