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PET is an abbreviation for Positron Emission tomography, it uses small amounts of radioactive materials called radiotracers, a special camera and a computer to help evaluate the organ and tissue functions. By identifying body changes at the cellular level, PET may detect the early onset of disease before it is evident on other imaging tests.
Nuclear medicine procedures are able to pinpoint molecular activity within the body and they offer the potential to identify disease in its earliest stages as well as a patient’s immediate response to therapeutic interventions. Nuclear medicine imaging uses small amounts of radioactive material to diagnose and determine the severity of disease or treat a variety of diseases, including many types of cancers, heart disease, gastrointestinal, endocrine, neurological disorders and other abnormalities within the body. These procedures are non-invasive and painless medical tests that help physicians diagnose and evaluate medical conditions. A PET scan machine measures important body functions, such as blood flow, oxygen use and sugar/glucose metabolism to help doctors evaluate how well organs and tissues are functioning. A PET scan procedure is used to detect cancerous tissues and cells in the body that may not always be found through CT or MRI.
Uses of PET CT scan:
These differences, compared to normal tracer uptake and metabolism make it possible to detect which part of an organ is affected by a disease.
Advanced nuclear imaging technique combines Positron Emission Tomography scan (PET) and Computed Tomography (CT) into one scanning machine. A PET CT scan reveals information about both the structure and function of cells and tissues in the body during a single imaging session. Images acquired from both devices in the same session are combined into a single superposed co-registered image. Thus, functional imaging obtained by PET, which depicts the spatial distribution of metabolic or biochemical activity in the body can be more precisely aligned or correlated with anatomic imaging obtained by CT scanning.
The PET CT scanner detects pairs of gamma rays that are emitted indirectly by a tracer-positron-emitting radionuclide, which is placed in the body on a biologically active molecule. The images are reconstructed by computer analysis. CT imaging uses special X-ray equipment and in some cases a contrast material to produce multiple images or pictures of the inside of the body. These images can then be interpreted by a radiologist on a computer monitor.
The day your doctor advises the PET CT scan
When you schedule an appointment for the test, the staff at the facility will tell you how to prepare for the PET CT scan on the day before the test and on the day of your test.
The Day before the PET CT Scan test
The Day of the PET CT Scan test
After your PET CT scan