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Compact Tabletop Magnetic Resonance Elastography for Mapping Soft Tissue Viscoelasticity.

Weijie Zhao1, Lisa-Marie Skrip2, Heiko Tzschätzsch3

  • 1Department of Radiology, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|May 19, 2026
PubMed
Summary

Tabletop magnetic resonance elastography (ttMRE) quantifies tissue stiffness and heterogeneity in colorectal liver metastasis. This method differentiates chemotherapy responders from non-responders by analyzing biomechanical properties, offering a low-cost diagnostic tool.

Keywords:
chemotherapy treatment responsecolorectal liver metastasisintratumoral biomechanical heterogeneitymagnetic resonance elastographytabletop magnetic resonance elastography

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Area of Science:

  • Biomedical Engineering
  • Medical Imaging
  • Oncology

Background:

  • Tabletop magnetic resonance elastography (ttMRE) is an emerging tool for soft tissue biomechanics.
  • Current ttMRE lacks spatial resolution for heterogeneous tissues like tumors.
  • Assessing biomechanical heterogeneity is crucial for understanding tumor behavior and treatment response.

Purpose of the Study:

  • To develop and validate ttMRE for quantifying intratumoral biomechanical heterogeneity in human colorectal liver metastasis (CRLM).
  • To establish ttMRE as a tool for differentiating treatment responders from non-responders based on tissue biomechanics.

Main Methods:

  • Excitation of cylindrical, multifrequency shear waves.
  • Reconstruction of viscoelastic maps using adaptive bandpass filters with rheological Bessel-fit priors.
  • Validation using numerical and viscoelastic phantoms.

Main Results:

  • Biophysical markers from ttMRE showed agreement with ground-truth measurements.
  • CRLM specimens from chemotherapy responders exhibited less viscous, stiffer, and more biomechanically heterogeneous tissue compared to non-responders.
  • Heterogeneity metrics (interquartile range, Shannon entropy) demonstrated higher diagnostic accuracy than direct viscoelastic parameters.

Conclusions:

  • Compact, automated ttMRE is a validated, low-cost platform for spatial biomechanical profiling of CRLM.
  • ttMRE enables quantitative assessment of treatment response in colorectal liver metastasis.
  • This technology holds potential for improved cancer diagnostics and personalized treatment strategies.