CPT® Code 78813

Positron emission tomography (PET) imaging, commonly known as a PET scan, is a sophisticated diagnostic imaging procedure that provides detailed physiologic images of the entire body. This technique utilizes a radioactive substance, referred to as a radioisotope, which is administered to the patient to facilitate the imaging process. The radioisotope emits positrons, which are detected during the imaging procedure, allowing for the visualization of various body regions. PET imaging is particularly valuable in the medical field for its ability to detect malignant lesions, assess the effectiveness of cancer treatments, and evaluate other medical conditions. The radioisotopes used in PET scans are characterized by their short half-lives, necessitating the use of a cyclotron to produce them immediately before the procedure. Once produced, the radioisotope is typically tagged to a natural compound, such as glucose, and is administered to the patient either intravenously or, in rare cases, by inhalation. Following administration, the radioisotope is absorbed by different tissues and organs at varying rates, which is crucial for distinguishing between normal and diseased tissues during the imaging process. The patient is prepared for the procedure by having an intravenous line placed, after which they are instructed to rest quietly to allow for optimal distribution of the radioisotope, a process that may take between 30 to 90 minutes. Subsequently, PET images are captured, and a radiologist reviews these images, analyzing the patterns of radioisotope accumulation to provide a comprehensive interpretation and written report, often comparing the current images with any prior radiological studies for a thorough evaluation.