|Imaging artefacts and pitfalls in 18F-FDG-PET/CT interpretation
P. Bochev, A. Klisarova, J. Dancheva, B. Chaushev, B. Balev
PET/CT is a combined diagnostic modality, which includes positron-emission tomography and computed tomography in a single integrated apparatus, providing both functional and structural information in a single image set. This modality is applicable in wide spectra of diagnostic situations, based mainly on the PET radiopharmaceutical utilized. The routine PET/CT diagnosis is by far dominated by 18Flourine labeled fluorodeoxiglucosae (FDG). FDG PET/CT has an extremely wide and expanding use mainly in oncology and to some extend in neurology and cardiology. As a hybrid modality FDG PET/CT combines the advantages of pure PET and CT systems, augmenting the sensitivity and specificity of both methods. Along with the advantages, the hybrid systems combine the well known artifacts and pitfalls of both methods and generate some artifacts and pitfalls strictly specific for the combined PET/CT modality. This implements the need of expanded knowledge on possible sources of error and the options for their avoidance, as well as routine knowledge on the critical
moments of patient selection and preparation in order to provide best quality examination and reliable diagnostic results.
|Key words: PET/CT. 18F-FDG. IMAGING ARTIFACTS. PITFALLS|