Liver fibrosis assessment: MR and US elastography

Area of Science:

• Medical Imaging
• Hepatology
• Biomarkers

Background:

• Liver fibrosis assessment is crucial for managing chronic liver disease (CLD).
• Non-invasive imaging techniques are increasingly preferred over traditional biopsy methods.
• Elastography provides quantitative liver stiffness measurement (LSM) as a surrogate biomarker for fibrosis.

Purpose of the Study:

• To review current elastography methods for liver fibrosis assessment.
• To discuss the clinical applications of liver elastography.
• To provide an overview of recent advancements in the field.

Main Methods:

• Ultrasound-based elastography: strain elastography, 2D-SWE, pSWE, VCTE.
• Magnetic Resonance Elastography (MRE): 2D-GRE-MRE.
• Comparison of measurement outputs: estimated Young's modulus (eYM) for ultrasound, complex shear modulus for MRE.

Main Results:

• Both MRE and ultrasound elastography methods demonstrate high accuracy in detecting advanced liver fibrosis and cirrhosis.
• Elastography is effective for predicting liver decompensation.
• Elastography aids in differentiating non-alcoholic steatohepatitis (NASH) from simple steatosis (SS).

Conclusions:

• Elastography is a valuable non-invasive tool for assessing liver fibrosis severity.
• Current elastography techniques offer reliable quantitative assessment of liver stiffness.
• Ongoing advancements promise expanded clinical utility of liver elastography.