Table 1.

Parameters for the 2D and 3D MRE

Parameters	2D MRE	3D MRE
Acquisition matrix	80 × 80	80 × 80
TE (ms)	51.4–52.5	51.7–52.8
TR (ms)	1000–1067	1334
EPI-shots	1	1
No. of breath holds × breath hold time (s)	1 × 16	3 × 21
FOV (cm)	38–44	38.7–44.8
No. of slices × slice thickness (mm)	4 × 8	32 × 3.5
Gap between slices (mm)	2	0
Parallel imaging acceleration factor	2	2
Phase offsets	4	3
Receiver bandwidth	500 kHz	500 kHz
% FOV in phase-encoding direction	75–100	100
Flow compensation	Yes	Yes
Superior-inferior spatial presaturation bands	Yes	Yes
Motion sensitivity (μm/radian)	7.86	7.86
Motion encoding directions	± Z	± X, Y, Z

TE, echo time; TR, repetition time; FOV, field of view; 2D, two-dimensional; 3D, three-dimensional; EPI, echo-planar imaging; MRE, magnetic resonance elastography