Abstract
Context: Acoustic radiation force impulse (ARFI) elastography is a noninvasive and
quantitative technique for diagnosis of liver fibrosis. To the best of our knowledge,
there are only two studies reported in literature for evaluation of alcoholic liver
disease using ARFI. Aims: The aim of this study was to evaluate the diagnostic performance
of ARFI elastography for assessing liver fibrosis in alcoholic liver disease and compare
it with biochemical indices aspartate transaminase-to-platelet ratio index (APRI)
and fibrosis-4 Index (FIB-4) using histopathology as the reference standard. Settings
and Design: Institutional cross-sectional study. Methods and Materials: The patients
visiting our hospital over a period of 2 years with a high-risk consumption of alcohol
(>40 g/day for men and >20 g/day for women for a cumulative period of more than 5
years) were subjected to ARFI elastography of liver, Liver Function Tests (to calculate
APRI and FIB-4 indices), and liver biopsy. Statistical Analysis Used: Area under the
receiver operating characteristic (AUROC) curve analysis, Kruskal--Wallis test for
ANOVA. Results: A total of 50 patients of chronic alcoholic liver disease were evaluated
with ARFI elastography, which performed better than the biochemical indices in distinguishing
cirrhosis of the liver (F = 4) from the severe fibrosis (F ≥ 3) with area under the
receiver operating characteristic of 0.97, whereas for significant fibrosis (F ≥ 2)
and severe fibrosis (F ≥ 3), it was comparable to the biochemical indices with AUROC
of 0.65 and 0.70. In our study, the median shear wave velocity cutoff values were
1.37 m/s, 1.51 m/s, and 1.87 m/s for F ≥ 2, F ≥ 3, and F = 4 fibrosis stages, respectively.
Conclusions: ARFI elastography is a noninvasive, reliable, and repeatable diagnostic
test for grading of liver fibrosis. It performs better than the biochemical indices
to differentiate severe fibrosis and cirrhosis of liver.
Keywords
Acoustic radiation force impulse elastography - alcoholic liver disease - shear wave
velocity, fibrosis stages