Korean J Radiol.  2014 Apr;15(2):210-217. 10.3348/kjr.2014.15.2.210.

Noninvasive Assessment of Hepatic Fibrosis in Patients with Chronic Hepatitis B Viral Infection Using Magnetic Resonance Elastography

• Lee JE
• Lee JM
• Lee KB
• Yoon JH
• Shin CI
• Han JK
• Choi BI

• KMID: 1705575
• DOI: http://doi.org/10.3348/kjr.2014.15.2.210

Abstract

OBJECTIVE
To evaluate the diagnostic performance of magnetic resonance elastography (MRE) for staging hepatic fibrosis in patients with chronic hepatitis B virus (HBV) infection.
MATERIALS AND METHODS
Patients with chronic HBV infection who were suspected of having focal or diffuse liver diseases (n = 195) and living donor candidates (n = 166) underwent MRE as part of the routine liver MRI examination. We measured liver stiffness (LS) values on quantitative shear stiffness maps. The technical success rate of MRE was then determined. Liver cell necroinflammatory activity and fibrosis were assessed using histopathologic examinations as the reference. Areas under the receiver operating characteristic curve (Az) were calculated in order to predict the liver fibrosis stage.
RESULTS
The technical success rate of MRE was 92.5% (334/361). The causes of technical failure were poor wave propagation (n = 12), severe respiratory motion (n = 3), or the presence of iron deposits in the liver (n = 12). The mean LS values, as measured by MRE, increased significantly along with an increase in the fibrosis stage (r = 0.901, p < 0.001); however, the mean LS values did not increase significantly along with the degree of necroinflammatory activity. The cutoff values of LS for > or = F1, > or = F2, > or = F3, and F4 were 2.45 kPa, 2.69 kPa, 3.0 kPa, and 3.94 kPa, respectively, and with Az values of 0.987-0.988.
CONCLUSION
MRE has a high technical success rate and excellent diagnostic accuracy for staging hepatic fibrosis in patients with chronic HBV infection.

Keyword

Liver cirrhosis; Hepatitis B; MRE; Magnetic resonance imaging; Liver; Hepatic fibrosis

MeSH Terms

Adolescent
Adult
Aged
*Elasticity Imaging Techniques
Female
Hepatitis B, Chronic/complications/*diagnosis
Humans
Iron Overload/diagnosis
Liver Cirrhosis/*diagnosis/pathology
Living Donors
Male
Middle Aged
Movement
ROC Curve
Respiration
Young Adult

Figure

• 

  Fig. 1 MR elastographic data in living liver donor candiate (A-C) and in patient with liver cirrhosis (D-F). A, D. Anatomic images of donor and patient with grade 4 fibrosis are shown in far left column. B, E. Middle column of images shows wave image data. C, F. Resulting elastograms are shown in far right column. Elastograms show that mean liver stiffness value of fibrotic liver was much higher than that of normal liver (6.10 kPa vs. 2.13 kPa, respectively).

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