PET Scan - Positron Emission Tomography

Positron Emission Tomography


PET scan (Positron Emission Tomography), uses small amounts of radioactive material to diagnose and determine the severity of diseases, including many types of cancers, heart disease, gastrointestinal, endocrine, neurological disorders and other abnormalities within the body. A PET scan measures important body functions, such as blood flow, oxygen use, and sugar (glucose) consumption, to help doctors evaluate how well organs and tissues are functioning. Most PET scans are performed on instruments that are combined PET and CT scanners. The combined PET/CT scans provide images that pinpoint the location of abnormal metabolic activity within the body have been shown to provide more accurate diagnoses than the two scans performed separately.

Positron Emission Topography Cancer  Treatment PET and PET/CT scans are performed to (1) detect cancer; (2) determine whether a cancer has spread in the body, (3) assess the effectiveness of a treatment plan, such as cancer therapy, (4) determine if a cancer has returned after treatment; (5) determine blood flow to the heart muscle, (6) determine the effects of a heart attack on areas of the heart, (7) identify areas of the heart muscle that would benefit from a procedure such as angioplasty or coronary artery bypass surgery, (8) evaluate brain abnormalities, such as tumors, memory disorders and seizures and other central nervous system disorders, (9) to map normal human brain and heart function.

(REFERENCE. RadiologyInfo.org from ACR and RSNA)