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Published on: July 21, 2023
Liver MRI and histological correlates in chronic liver disease on multiphase gadolinium-enhanced 3D gradient echo
Diego R Martin1, Thomas Lauenstein, Bobby Kalb
1Department of Radiology, University of Arizona School of Medicine, Tucson, AZ, USA. dmartin@radiology.arizona.edu
Purpose:
To evaluate intrinsic hepatic enhancement patterns on multiphase, gadolinium-enhanced, fat-suppressed, 3D T1-weighted, gradient echo magnetic resonance imaging (MRI) as a quantitative correlate for severity of pathological changes in chronic liver disease (CLD).
Materials And Methods:
This study was HIPAA-compliant and Institutional Review Board-approved. In all, 75 patients were studied by contrast-enhanced multiphase abdominal MRI. CLD patients had liver histology correlation derived from right lobe liver biopsies. Contrast-enhanced arterial- and delayed-phase 3D gradient recalled echo (GRE) liver MRI were scored using feature categorization templates to quantify enhancement patterns by three independent readers. Liver histopathology was staged/graded for fibrosis/inflammation using the Scheuer system. Statistical testing for MRI histology correlates used a Pearson's product moment correlation and a Wilcoxon-Mann-Whitney two-sample rank-sum test. Reader agreement was analyzed by a modified Fleiss' kappa test.
Results:
MRI histology correlation was high for delayed-phase MRI versus fibrosis stage (95% confidence interval [CI] 0.941 < r < 0.976, P = 5 × 10(-7)), but lower for all other comparisons (delayed-phase vs. inflammation and arterial-phase vs. inflammation or fibrosis all showed a CI no greater than 0.64). Paired testing between delayed-phase MRI score and histology fibrosis staging incremental levels was significant (from P < 10(-2) to P < 10(-5)).
Conclusion:
A standard gadolinium-enhanced liver MRI may provide a correlate measure of hepatic fibrosis over a spectrum of severity.
Insights
Gadolinium-enhanced MRI shows delayed-phase enhancement patterns correlate with liver fibrosis severity in chronic liver disease (CLD). This imaging technique may quantify hepatic fibrosis progression.
Area of Science:
- Radiology
- Hepatology
- Medical Imaging
Background:
- Chronic liver disease (CLD) involves progressive fibrosis and inflammation.
- Accurate staging of liver fibrosis is crucial for patient management and treatment decisions.
- Non-invasive imaging biomarkers are needed to assess liver pathology severity.
Purpose of the Study:
- To evaluate intrinsic hepatic enhancement patterns on multiphase, gadolinium-enhanced, fat-suppressed, 3D T1-weighted, gradient echo MRI.
- To determine if these enhancement patterns quantitatively correlate with the severity of pathological changes in CLD.
- To assess the utility of MRI in staging liver fibrosis and inflammation.
Main Methods:
- 75 patients with CLD underwent contrast-enhanced multiphase abdominal MRI.
- Liver biopsies provided histological correlation for fibrosis and inflammation staging (Scheuer system).
- Delayed-phase and arterial-phase 3D gradient recalled echo (GRE) liver MRI were scored by three readers to quantify enhancement patterns.
Main Results:
- High correlation was observed between delayed-phase MRI enhancement and liver fibrosis stage (r > 0.94, P < 10(-6)).
- Correlation was lower for delayed-phase MRI versus inflammation, and arterial-phase MRI versus inflammation or fibrosis (CI ≤ 0.64).
- Significant paired testing confirmed the association between delayed-phase MRI scores and incremental fibrosis stages (P < 10(-2) to P < 10(-5)).
Conclusions:
- Standard gadolinium-enhanced liver MRI can provide a quantitative correlate for hepatic fibrosis.
- Delayed-phase enhancement patterns show promise as a non-invasive biomarker for assessing fibrosis severity in CLD.
- This MRI approach may aid in monitoring disease progression and treatment response.
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