At a glance
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Diffusion-weighted Imaging Magnetic Resonance for Assessing Liver Fibrosis in Patients With Chronic Viral Hepatitis
In Brief
A clinical study evaluating Diffusion-weighted magnetic resonance imaging (DW-MRI) for Fibrosis, Liver. Completed, enrolled 121 participants across 1 site.
Detailed Summary
Several noninvasive radiological techniques have been investigated for the diagnosis of liver fibrosis and cirrhosis among patients with chronic infection with hepatitis B virus or hepatitis C virus. Diffusion-weighted magnetic resonance imaging (DW-MRI) is a particularly appealing method for the diagnosis of liver fibrosis. The aims of this study are to evaluate the accuracy of DW-MRI in patients with chronic viral hepatitis for determining the stage of liver fibrosis.
Study Details
Timeline
Interventions
Magnetic resonance (MR) imaging examination of liver will be performed on a 3.0T Achieva MR scanner (Philips Medical Systems, The Netherlands). Diffusion-weighted imaging (DWI) will be performed using a single-shot echo-planar imaging during a single end expiratory breath-hold. A single observer placed circular regions of interest around 2.30 cm2 to measure mean signal intensity (SI) in the right hepatic lobe and the spleen for each b value, avoiding areas of artifact, vessels, and focal lesions. A monoexponential fit will be performed to calculate liver and spleen apparent diffusion coefficient (ADC) on the basis of ln(SI) as a function of b value, using all b values. Normalized liver ADC will be calculated as the ratio of liver ADC to spleen ADC.