Periportal thickening on magnetic resonance imaging for hepatic fibrosis in infantile cholestasis

Figure 1 Example of measuring of periportal thickening on magnetic resonance imaging. Pancreaticobiliary magnetic resonance imaging of a 3-mo-old girl diagnosed as biliary atresia. A: On T1-weighted axial image, the maximal thickness of periportal signal change was measured on right main portal vein where its greatest thickness was 5.5 mm; B: On T2-weighted sagittal image, the maximal thickness of periportal signal change was 6.1 mm. Therefore, the larger of the two, which was measured on T2-weighted sagittal image, was defined as periportal thickening of this patient.