Fig. 4

a Sonography of the liver shows hypoechoic appearance over caudate lobe. b Contrast-enhanced computed tomography shows focally less enhancement in S1 of the liver. c Magnetic resonance imaging (MRI) of the liver shows a low signal intensity over the caudate lobe in T1-weighted images. d MRI of the liver shows a high signal intensity over the caudate lobe in T2-weighted images