Why the study?
Do different fat-suppression-related sequence operations affect stiffness stability in spin-echo echo-planar imaging magnetic resonance elastography in a phantom model?
Do different fat-suppression-related sequence operations affect stiffness stability in spin-echo echo-planar imaging magnetic resonance elastography in a phantom model?
This phantom study evaluates the impact of various fat-suppression techniques on stiffness stability in magnetic resonance elastography.
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May influence MRE stiffness repeatability by sequence in phantoms; leaves open in vivo validation before clinical adoption.
Spin-echo echo-planar imaging (SE-EPI)-based magnetic resonance elastography (MRE) is susceptible to chemical shift artifacts, making sequence-related operations important for stable measurements. This phantom study evaluated the influence of fat-suppression-related sequence operations on stiffness measurement variability in SE-EPI MRE. Imaging was performed at 3-T under six conditions, with five repeated acquisitions and four slices per scan. Mean stiffness, variability, and measurable area were assessed using the average coefficient of variation (aCV), and signal-to-noise ratio (SNR) was quantitatively evaluated. All conditions yielded stiffness values within the expected range. Spectral attenuated inversion recovery with strong showed the lowest aCV (0.7%), whereas water excitation showed the highest aCV (6.0%) and the smallest measurable area. Sequence-related differences were associated with variability, suggesting contributions from SNR and sequence-dependent signal characteristics affecting stiffness stability.
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Yoshimura et al. (2026) studied this question.
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