Focal liver lesions: Practical magnetic resonance imaging approach

Figure 6 Abscess. GRE T1-WI (A), fat-suppressed FSE T2-WI (B), and postcontrast fat-suppressed 3D-GRE T1-WI at the arterial (C) and portal venous (D) phases. A thick-walled oval shaped lesion is present on the right hepatic lobe (white arrow, A-D), showing an air/fluid level content (black arrow, A-D). There is an associated halo of edema surrounding the lesion, showing low signal intensity on T1-WI (A), high signal intensity on T2-WI (B) and marked enhancement after gadolinium administration (C and D), which is consistent with active inflammation. GRE: Gradient-echo; FSE: Fast spinecho; T1-WI: T1-weighted images.