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Optimizing Imaging Protocols for Overweight and Obese Patients: A Lutetium Orthosilicate PET/CT Study

¹ Department of Molecular and Medical Pharmacology, Ahmanson Biological Imaging Center, UCLA David Geffen School of Medicine, Los Angeles, California
² Department of Radiological Sciences, UCLA David Geffen School of Medicine, Los Angeles, California

View larger version (42K): [in a new window]   FIGURE 1. Images of 38-y-old, 114-kg (250 lb) patient with breast cancer. Small focus of increased glycolytic activity (arrows) seen on 1, 3, 5, and 7 min/bed position scans corresponded to enlarged lymph nodes on CT. Despite considerable noise on 1 and 3 min/bed position scans, lesion was identified even on these short scans.

View larger version (37K): [in a new window]   FIGURE 2. Images of 54-y-old, 93-kg (205 lb) patient with lymphoma. Small focus of increased 18F-FDG uptake (arrows) seen in right upper abdomen corresponded to 1.1-cm perihepatic lymph node. Because of substantial image noise, this lesion was missed on 1 and 2 min/bed position scans.