Magnetic resonance imaging ancillary features used in Liver Imaging Reporting and Data System: An illustrative review

Figure 8 Corona enhancement. T2-weighted image (A), unenhanced in-phase T1-weighted GRE images (B), and post-contrast fat-suppressed 3D-GRE T1-weighted images during the late hepatic arterial (C) and delayed phases (D). A small nodule in the right hepatic lobe with near isointense T2 signal (A) and iso to hypointense T1 signal (B) shows heterogeneous arterial ring-like enhancement in the arterial phase. Enhancement of the peri-lesional parenchyma is recognized (arrow, C). This transient enhancement is known as corona enhancement and suggests a more aggressive course. Washout is seen on delayed phase images (D).