Metabolic imaging with FDG: a primer

The Cancer Journal
D Delbeke, William H Martin

Abstract

The rapid advances in imaging technologies are a challenge for both radiologists and clinicians who must integrate these technologies for optimal patient care and outcomes at minimal cost. Multiple indications for functional imaging using fluorode-oxyglucose (FDG) are now well accepted in the fields of neurology, cardiology, and oncology, including differentiation of benign from malignant lesions, staging of malignant lesions, detection of malignant recurrence, and monitoring of therapy. The fusion of anatomic and molecular images (computed tomography [CT] and FDG) obtained with integrated positron emission tomography (PET)-CT systems, sequentially in time but without moving the patient from the imaging table, allows optimal co-registration of anatomic and molecular images, leading to accurate attenuation correction and precise anatomic localization of lesions with increased metabolism. This powerful technology provides a valuable new tool for diagnostic and therapeutic applications. The diagnostic accuracy is improved in approximately 50% of patients because of improvement of lesion detection on both CT and FDG PET images, better differentiation between physiologic and pathological foci of FDG uptake, and better localization o...Continue Reading

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