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FIG 1. Comparison of FDG images obtained from a healthy volunteer using dedicated ring-detector PET (dr-PET) (upper panel) and a dual-head coincidence gamma camera (DHC) (lower panel). Both sets of images clearly show brain FDG distribution, but the contrast with DHC was lower than that with dr-PET. FDG uptake in the frontal lobe was relatively higher with DHC as compared with that of dr-PET
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