Artifacts in FDG PET and PET/CT
As the number of clinical positron emission tomography (PET) units is increasing, interpretation of PET images requires knowledge of the possible pitfalls that may occur because of artifacts and mimic pathology. In addition, the advent of combined PET/computed tomography (CT) scanners in clinical imaging practice has brought its own specific pitfalls and artifacts. These artifacts may be caused by various factors such as injection, attenuation material, image reconstruction, contamination, patient movements, and pathologic variants. Knowledge of the normal distribution of fluorodeoxyglucose (FDG) and its pathologic variation is essential before interpreting PET scans as well as an awareness of potential false positive and negative cases that can occur. With attention to detail in the preparation of patients, together with appropriate imaging protocols and experience in interpretation, many pitfalls can be avoided.
KeywordsAttenuation Iodine Tuberculosis Adenosine Radionuclide
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