Fig. 15From: How clinical imaging can assess cancer biologyRelapsing brain astrocitoma (white arrow) in a 54 year-old-man. a 18F-FDG and b 11C-methionine coronal-reformatted images. Normal uptake of FDG in brain impeded an adequate tumor detection and delineation. However, 11C-methionine PET clearly depicted the tumor (white arrow)Back to article page