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Table 1 Grading standard for the evaluation of ultrasonographic changes on liver fibrosis

From: Artificial neural network aided non-invasive grading evaluation of hepatic fibrosis by duplex ultrasonography

 Variables 

0

1

2

Liver envelope

Smooth

slightly coarse

obviously coarse or like wavy changes

Liver parenchyma

Homogeneous

Heterogenous

coarsened

Ascites

no or < 500 ml

500 ml ~ 3000 ml

> 3000 ml

HV waveform

Triphasic

Biphasic

monophasic