Secondary peritonitis MRI

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] Associate Editor(s)-in-Chief: Shivani Chaparala M.B.B.S [2]

Overview

MRI is an emerging imaging modality for the diagnosis of suspected intra-abdominal abscesses. MRI should be considered for acute abdomen due to hepatobiliary disease and gynecological disease for which a diagnosis is not obtained by ultrasonography and CT as well as for a pregnant woman for whom ultrasonography does not lead to a diagnosis.

Key MRI Findings in Secondary peritonitis

• Abdominal abscesses demonstrate decreased signal intensity on T1-weighted images and homogeneous or heterogeneous increased signal intensity on T2-weighted images;
• Abscesses are observed best on gadolinium-enhanced, T1-weighted, fat-suppressed images as well-defined fluid collections with rim enhancement.