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. Author manuscript; available in PMC: 2014 Jan 1.
Published in final edited form as: Osteoarthritis Cartilage. 2012 Oct 6;21(1):86–93. doi: 10.1016/j.joca.2012.09.014

Table 1.

MR Acquisition Parameters

Sequence Parameters* Variables
sagittal T2-weighted fat-saturated fast spin-echo (FSE) TR/TE = 4300/51 ms, field of view = 14 cm, matrix = 512 × 256 slice thickness = 2.5 mm, gap = 0.5 mm, echo train length [ETL] = 9, bandwidth = 31.25 kHz, NEX = 2, acquisition time = 4 min Semi-quantitative clinical WORMS grades
Sagittal 3D T1ρ quantification sequence TR/TE = 9.3/3.7 ms, time of recovery = 1500 ms, field of view = 14 cm, matrix = 256×192, ST = 3 mm, bandwidth = 31.25 kHz, views per segment = 48, time of spin-lock (TSL) = 0/10/40/80 ms, FSL = 500 Hz, acquisition time = 13 min Superficial and Deep Articular Cartilage T1ρ Relaxation times
Sagittal 3D T2 quantification sequence same as the T1ρ quantification except for magnetization preparation TE = 3.1/13.5/23.9/44.8 ms, acquisition time = 13 min Superficial and Deep Articular Cartilage T2 Relaxation times
Axial Trabecular Bone structure quantification sequence axial fully refocused steady state free-precession (SSFP) 3D phase cycles Fast Imaging Employing Steady State Acquisition (3D FIESTA-c) sequence, TR/TE = 11/4.2 ms, acquisition matrix = 512 × 384, flip angle = 60, field of view = 10 cm, 90 slices, slice thickness = 1 mm, acquisition time = 10 min app. BV/TV, app. Tb.Th, app. Tb.Sp, app, Tb.N
*

TR = Repetition Time, TE = Echo Time