ARRS Case of the Week

NUCLEAR MEDICINE: PET/CT

Case Author: David M. Naeger, MD, University of California, San Francisco, Medical Center

History

64-year-old man with a right lower lobe solitary pulmonary nodule; PET/CT is ordered for characterization.

Imaging Findings

Axial FDG PET image (A) shows marked asymmetry in the region of the vertex. CT image (B) obtained at the same level as A shows a craniotomy plate causing intense streak artifact. Fused PET/CT image (C) shows that the apparent activity corresponds to the cortical region immediately subjacent to the plate.

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