Quantitative analysis of the ACL and PCL using T1rho and T2 relaxation time mapping: an exploratory, cross-sectional comparison between OA and healthy control knees

Table 1 Sequence parameters

Sequence	TR (ms)	TE (ms)	TSL (ms)	Matrix	FOV (mm)	In-plane spatial resolution (mm)	Slice thickness (mm)	Flip angle (^o)	No. of averages	Sequence duration (mins)
3D-FS SPGR	25.6	6.7	N/A	512 × 380	160 × 120	0.31 × 0.31	1	20	0.5	7
3D FSE T1rho	1260	35	1/10/20/35	320 × 256	150 × 120	0.47 × 0.47	3	90	0.5	5
3D FSE T2	1285	6.5/13.4/27.0/40.7	N/A	320 × 256	150 × 120	0.47 × 0.47	3	90	0.5	5

NOTE: TR Repetition time, TE Echo time, TSL Spin-lock pulse duration, FOV Field of view, SPGR Spoiled gradient recalled-echo, FS fat-suppressed, FSE Fast spin echo. No. of averages = 0.5 = a half-fourier acquisition using phase-conjugate symmetry for acceleration purposes. Sequence times are rounded to nearest 30 s

ISSN: 1471-2474