**6.4 F-18 FDG PET: Hybrid PET/CT imaging**

Hybrid PET/CT systems in fact gained more popularity than the SPECT/CT systems and PET imaging is synonymously used for PET/CT imaging. The incorporation of anatomical data fused with the functional PET images results in accurate localization of the abnormalities and moreover detailed characterization of the lesions can be ascertained. In our experience PET/CT imaging for infectious process has limited utility, primarily in cases of FUO, vasculitis, malignant otitis externa and assessment of chronic osteomyelitis. However, as more evidence based data surface, this modality may prove to be an important method in detection and management of a number of infective conditions.
