Comparison of non-invasive assessment of liver fibrosis in patients with alpha1-antitrypsin deficiency using magnetic resonance elastography (MRE), acoustic radiation force impulse (ARFI) Quantification, and 2D-shear wave elastography (2D-SWE)

PLoS One. 2018 Apr 26;13(4):e0196486. doi: 10.1371/journal.pone.0196486. eCollection 2018.

Abstract

Purpose: Although it has been known for decades that patients with alpha1-antitrypsin deficiency (AATD) have an increased risk of cirrhosis and hepatocellular carcinoma, limited data exist on non-invasive imaging-based methods for assessing liver fibrosis such as magnetic resonance elastography (MRE) and acoustic radiation force impulse (ARFI) quantification, and no data exist on 2D-shear wave elastography (2D-SWE). Therefore, the purpose of this study is to evaluate and compare the applicability of different elastography methods for the assessment of AATD-related liver fibrosis.

Methods: Fifteen clinically asymptomatic AATD patients (11 homozygous PiZZ, 4 heterozygous PiMZ) and 16 matched healthy volunteers were examined using MRE and ARFI quantification. Additionally, patients were examined with 2D-SWE.

Results: A high correlation is evident for the shear wave speed (SWS) determined with different elastography methods in AATD patients: 2D-SWE/MRE, ARFI quantification/2D-SWE, and ARFI quantification/MRE (R = 0.8587, 0.7425, and 0.6914, respectively; P≤0.0089). Four AATD patients with pathologically increased SWS were consistently identified with all three methods-MRE, ARFI quantification, and 2D-SWE.

Conclusion: The high correlation and consistent identification of patients with pathologically increased SWS using MRE, ARFI quantification, and 2D-SWE suggest that elastography has the potential to become a suitable imaging tool for the assessment of AATD-related liver fibrosis. These promising results provide motivation for further investigation of non-invasive assessment of AATD-related liver fibrosis using elastography.

Publication types

  • Comparative Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Aged
  • Body Mass Index
  • Case-Control Studies
  • Elasticity Imaging Techniques / methods*
  • Female
  • Genotype
  • Humans
  • Liver / diagnostic imaging*
  • Liver Cirrhosis / complications
  • Liver Cirrhosis / diagnostic imaging*
  • Liver Cirrhosis / pathology
  • Male
  • Middle Aged
  • Prospective Studies
  • alpha 1-Antitrypsin / blood
  • alpha 1-Antitrypsin / genetics
  • alpha 1-Antitrypsin Deficiency / complications
  • alpha 1-Antitrypsin Deficiency / diagnosis*
  • alpha 1-Antitrypsin Deficiency / genetics

Substances

  • alpha 1-Antitrypsin

Grant support

We acknowledge support from the German Research Foundation (Deutsche Forschungsgemeinschaft, DFG) and the Open Access Publication Fund of Charité – Universitätsmedizin Berlin to cover the publication fees.