Marc P. Banner

Abstract Ultrasonography (US) is usually the initial imaging modality for evaluation of pathologic conditions of the scrotum. However, magnetic resonance (MR) imaging can be useful as a problem-solving tool when sonographic findings are equivocal. MR imaging allows characterization of scrotal masses as intratesticular or extratesticular and can demonstrate various types of lesions and tissue, including cysts or fluid, solid masses, fat, and fibrosis.

Introduction Although ultrasonography (US) has been the primary modality for cross-sectional imaging of the penis, the superior soft-tissue contrast and spatial resolution afforded by magnetic resonance (MR) imaging provide an opportunity to advance imaging evaluation of this organ. Clinical questions that remain unresolved after US examination can often be answered with penile MR imaging. This article reviews the anatomy of the penis as shown with surface-coil MR imaging performed at 1.5 T.