Evaluation of Pretreatment Magnetic Resonance Elastography for the Prediction of Radiation-Induced Liver Disease

Trey C. Mullikin, Kay M. Pepin, Jaden E. Evans, Sudhakar K Venkatesh, Richard L. Ehman, Kenneth W. Merrell, Michael G. Haddock, William S. Harmsen, Michael G. Herman, Christopher L. Hallemeier

Research output: Contribution to journalArticlepeer-review

Abstract

Purpose: Magnetic resonance (MR) elastography (E) is a noninvasive technique for quantifying liver stiffness (LS) for fibrosis. This study evaluates whether LS is associated with risk of developing radiation-induced liver disease (RILD) in patients receiving liver-directed radiation therapy (RT). Methods and Materials: Based on prior studies, LS ≤3 kPa was considered normal and LS >3.0 kPa as representing fibrosis. RILD was defined as an increase in Child-Pugh (CP) score of ≥2 from baseline within 1 year of RT. Univariate and multivariate Cox models were used to assess correlation. Results: One hundred two patients, 51 with primary liver tumors and 51 with liver metastases, were identified with sufficient follow-up. In univariate models, pre-RT LS >3.0 kPa (hazard ratio [HR] 4.9; 95% confidence interval [CI], 1.6-14; P =.004), body mass index (BMI), clinical cirrhosis, CP score, albumin-bilirubin (ALBI) grade 2, primary liver tumor, and mean liver dose were significantly associated with risk of post-RT RILD. In a multivariate analysis, LS >3.0 and mean liver dose both were significantly associated with RILD risk. Conclusions: Elevated pre-RT LS is associated with an increased risk of RILD in patients receiving liver-directed RT.

Original languageEnglish (US)
Article number100793
JournalAdvances in Radiation Oncology
Volume6
Issue number6
DOIs
StatePublished - Nov 1 2021

ASJC Scopus subject areas

  • Oncology
  • Radiology Nuclear Medicine and imaging

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