Key clinical point: Magnetic resonance elastography (MRE)-based shear strain mapping may serve as a noninvasive biomarker enabling the characterization of the tumor-liver interface and preoperative prediction of microvascular invasion (MVI) in patients with hepatocellular carcinoma (HCC).
Major finding: The positive MVI vs. negative MVI group displayed a significantly higher octahedral shear strain (OSS) percentage of low-shear-strain length (pLSL) at three evaluation frequencies (60 Hz: 75% vs. 40%, 40 Hz: 85% vs. 40%, and 30 Hz: 70% vs. 20%; all P < .01). The peritumor OSS-pLSL area under the receiver operating characteristic curve (0.73-0.90) for MVI prediction was good/excellent at all frequencies.
Study details: The data are derived from a retrospective study of 59 patients with HCC, all of whom underwent the conventional 60 Hz MRE examination; of these, 29 patients also underwent 40 and 30 Hz MRE examinations.
Disclosures: The study was funded by the National Natural Science Foundation of China, among others. The authors declared no conflict of interests.
Source: Li M et al. MR elastography-based shear strain mapping for assessment of microvascular invasion in hepatocellular carcinoma. Eur Radiol. 2022 (Feb 11). Doi: 10.1007/s00330-022-08578-w