position emission tomography
Proton emission tomography
Radioactive High-Tech Scan
Positron Emissions Tomography. PET builds images by detecting energy given off by decaying radioactive isotopes. PET systems follow the paths of the two detected gamma rays to determine the originating collision point, a process called electronic collimation. The scanner uses these points to generate 3D image slices by a circular series of gamma-ray detectors (collimators) that envelope the patient or test animal.
using a computerized radiographic technique to examine the metabolic activity in various tissues (especially in the brain)
A procedure in which a small amount of radioactive glucose (sugar) is injected into a vein, and a scanner is used to make detailed, computerized pictures of areas inside the body where the glucose is used. Because cancer cells often use more glucose than normal cells, the pictures can be used to find cancer cells in the body.
A brain imaging technique that maps active brain areas via an injection of 2-deoxyglucose, which emits positrons when taken up by actively metabolizing cells.
positron emission tomography) scan: using a radioactive isotope that is taken up by tumor tissue showing that the tumor is functional
Abbreivation for positron emission tomography (scan). A PET scan measures cellular activity and can help distinguish between dead tissue or rapidly dividing cells such as cancer cells. A radioactive dye is injected into the patient before the scan is performed.
Positron Emission Tomography. It is a scanning technique which allows one to measure in detail the functioning of distinct areas of the human brain while the patient is comfortable, conscious and alert. The PET scanner utilizes radiation emitted from the patient to develop images. Each patient is given a minute amount of a radioactive pharmaceutical that closely resembles a natural substance used by the body. Gamma radiation produced from the breakdown of the radioactive component is detected by the PET scanner and shows in fine detail chemical activity in the brain. (http://www.triumf.ca/welcome/text_only/petscan.html)
An imaging technique that monitors blood flow and metabolism.
Positron emission tomography. An advanced, computerized imaging technique that uses radioactively-labels substances (e.g., glucose) to demonstrate chemical and metabolic activities in the brain as well as track other brain functions. Brain structures are also visualized on PET scans.
positron emission tomography. a diagnostic test using nuclear medicine in which tissue function can be imaged. Damaged tissues have reduced metabolic activity; therefore, gamma radiation from these areas is reduced or absent.
Positron Emmission Tomography
Positron emission tomography. A method for imaging cerebral blood flow and, indirectly, brain activity making use of tracers that emit positrons. The tracer is introduced into the subject's blood and then its concentration is measured using the emitted positrons. Since local cerebral blood flow appears to be correlated with neuronal activity PET scans can be used to monitor local brain activity.
Positron Emission Tomography. Positron emission tomography (PET) exploits the property of cancerous cells that absorbs more glucose than healthy cells. The technique involves using a radioactive substance tagged to a natural body compound, most commonly glucose. The substance is administered to a patient intravenously. Since cancerous tissue uses more glucose than normal issue, the injected substance helps discover diseased parts of the body and allows doctors to see if the cancer is spreading. Just a single PET scan can check the entire body and detect cancerous tissue measuring only several millimeters. PET imaging, therefore, is believed to be effective in discovering cancer at a very early stage and examining patients after a cancer operation.
positron emission tomography. in nuclear medicine, a procedure that measures the metabolic activity of cells.
Positron emission tomography. Uses radioisotopes to produce images of the activity of the brain and heart by tracking metabolism or blood flow and not anatomy.
positron emission tomography. a nuclear scanning device that gives a three-dimensional picture of the heart to provide information about the flow of blood through the coronary arteries to the heart muscle.
positron emission tomography—a method of imaging that detects metabolic or chemical activity in the body. In contrast, CT scans (computed tomography, or computed axial tomography—CAT) show anatomical structures. For example, a PET scan would show a tumor's increased sugar uptake, while a CT scan would reveal its size and density.
Positron Emission Tomography. PET is a non-invasive test that examines metabolism and biochemistry of various organs of the body. PET provides whole body images used for the detection, evaluation, and management of cancer, as well as for focused images of the brain and cardiac tissue. New England Neurological Associates affiliate New England PET Imaging System provides PET services on the grounds of Caritas Holy Family Hospital.
Positron Emission Tomography [PET]. A procedure that searches for cancer cells.
Positive Emission Tomography. Positive Emission Tomography is a scanning method that gives information about the chemical function of the body, rather than the structure. A radioactive tracer is injected into a vein to provide a color-coded picture of the body.
positron emission tomography. a method of which is used to record internal body images. Gamma rays are detected from body tissues which are isotopically labelled.
positron emission tomography. A method by which certain radioactive substances (isotopes) may depict metabolic functioning within brain tissue.
(positron emission tomography) (noun): an imaging method that allows one to visualize brain dopamine systems following the injection of a radioactive analog of levodopa (fluorodopa)
Positron emission tomography. A new scanning technique that uses radioactive isotopes to show how well cells are functioning search for Positron emission tomography (PET)
Positron Emission Tomography. Imaging technique in which minute amounts of radioactive material are used to detect cancer anywhere in the body.
Positron emission tomography. a non-invasive radiologic study which involves the injection or inhalation of a radioisotope
(from www.gmp1st.com/drglos). Positron Emission Tomography
positron emission tomography. (POZ-ih-tron ee-MIH-shun tah-MAH-greh-fee) Specialized method of medical imaging that is capable of displaying the metabolic activity of organs in the body using short-lived radioactive substances. This technique is very sensitive in detecting active tumor tissue and is useful in diagnosing cancer, locating brain tumors, and investigating other brain disorders.
Positron Emission Tomography. Medical test to measure function of an organ in the body.
positron emission tomography. a tool used to diagnose brain functions and disorders. PET produces three-dimensional, colored images of chemicals or substances functioning within the body. These images are called PET scans.
Positron emission tomography. A PET scan creates an image of the body (or of biochemical events) after the injection of a very low dose of a radioactive form of a substance, such as sugar. The scan computes the rate at which the tumor is using the sugar. In general, high-grade tumors use more sugar than normal and low-grade tumors use less. PET scans may also be used to see how well the tumor is responding to treatment
Positron emission tomography. A computer–assisted technique for generating cross–sectional images of a subject by measuring the radioactivity released by radiotracers within the subject’s body.
Positron Emission Tomography. An imaging technique that shows changes in blood flow as well as concentrations of oxygen and other substances in brain tissue. close window Recovered Memory An occurrence that someone recalls long after it is thought to have taken place. close window
Positron Emission Tomography. A technique used for imaging the brain activity by measuring the flow of blood containing radioactive atoms that emit positrons
Positron Emission Tomography. This is a functional imaging technique that allows in vivo assessment of human physiology. It allows the accurate measurement of tissue radioisotope tracer concentrations and their distribution in the body. Techniques of data collection and reconstruction allows the presentation of tissue tracer distributions in the form of images which can then be further analysed.
Positron emission tomography. A test that uses positron emitting substances to assess information about the metabolism of elements that can be used to indicate whether heart muscle is alive and functioning. A ring of radiosensitive detectors positioned around the chest reconstructs a two- or three-dimensional image of the heart.
Positron Emission Tomography. An imaging technique using small amounts of radioactive material that produces a cross-sectional view of specific chemical activities in the brain
Positron Emission Tomography. A diagnostic imaging technique using positively charged particles
Positron Emission Tomography. An imaging technique not unsimilar to SPECT or CT. In PET very short-lived radionuclides, mostly the fluoride isotope 18F, are injected - attached to a carrier molecule with an affinity to a specific organ/structure. The radionuclides used in PET will send out a positron (very small particle similar to electrons, but with a positive electrical charge) which immediately collides with an electron resulting in 2 high energy rays in exactly opposite directions each time an atom decays. When these rays hit a circular detector a computer can calculate the straight line along which the source of the positrons lies. By counting a large number of cross-bearings the exact size and position of the organ/structure that has taken up the radionuclide can be determined.
(Positron Emission Tomography) Imaging modality often used to obtain functional images of the brain.
Positron emission tomography. PET scans use whole-body imaging to allow doctors to view cellular activity of tissues inside the body. A sugar labeled with a radioactive isotope is injected into the patient's vein. The scanner takes measurements of the cells as they use the sugar. The measurements produce a picture.
Positron emission tomography. Technique that uses radioactive isotopes to produces images of the chemical function of organs such as blood flow in the brain.
Positron Emission Tomography. A nuclear scanning procedure that gives three-dimensional views of various organs and can identify some cancers long before other conventional imaging techniques.
positron emission tomography. A technique for imaging the brain in action. PET images show active regions in the brain.
Positron emission tomography. A technique for measuring brain function in living human subjects by detecting the location and concentration of tiny amounts of radioactive chemicals.
Positron emission tomography. an imaging technique that allows researchers to observe and measure brain activity by monitoring blood flow and concentrations of substances such as oxygen and glucose in brain tissues.
See Positron Emission Tomography
Positron Emission Tomography. A widely used imaging technique for detecting cancers and examining metabolic activity in humans and animals. A small amount of short-lived, positron-emitting radioactive isotope is injected into the body on a carrier molecule such as glucose. Glucose carries the positron emitter to areas of high metabolic activity, such as a growing cancer. The positrons which are emitted quickly, form positronium with an electron from the bio-molecules in the body and then annihilate producing gamma rays. Special detectors can track this process and enables the detection of cancers or abnormalities in brain function.
Positron emission tomography. a PET scan produces an image of the body, then computes specifications of tumors for precise diagnoses. PET scans are especially useful in taking images of the brain, although they are becoming more widely used to find the spread of cancer of the breast, colon, rectum, ovary, or lung. PET scans may also be used to see how well a tumor is responding to treatment.
Positron Emission Tomography. A nuclear medicine imaging test that detects differences in metabolism; often used to differentiate between healthy and abnormal tissue.
POSITRON EMISSION TOMOGRAPHY. A technique used to measure neural activity by monitoring changes in regional blood flow. PET has good spatial resolution but relatively poor temporal resolution.
In nuclear medicine, it produces 3-D computer-reconstructed images measuring and determining the biochemistry or physiology in a specific organ, tumor or other metabolically active site.
Positron Emission Tomography, a type of scan that measures changes in blood flow associated with brain function by detecting positrons, positively charged particles emitted by radioactively labeled substances that have been injected into the body.
Positron Emission Tomography. a computerized image of the metabolic activity of the body used to determine the presence of disease.
Positron Emission Tomography. Nuclear scanning of heart in three-dimensional graphic.
is an imaging technique that provides a picture of brain activity by measuring levels of injected glucose sugar "labeled" with a radioactive marker.
Positron emission tomography. ( More details)
Positron emission tomography - diagnostic technique producing comuterised images showing the chemical functioning of an organ or tissue.
Positron emission tomography. A computerized radiographic technique that shows metabolic activity occurring in various body structures (in the heart and brain, for example). A radioactive substance that emits positively charged electrons (positrons) is injected into or inhaled by the patient, in whom they combine with negatively charged electrons. The resulting gamma radiation is converted into color-coded images.
Positron emission tomography, a highly specialized imaging technique using short-lived radioactive substances. This technique produces three-dimensional colored images.
Positron Emission Tomography. A gamma camera scanner that picks up gamma rays (which are very similar to X-rays) from radioactive chemicals that have been injected, swallowed or breathed into the body. For a PET scan, the patient is injected with a small amount of a radioactive sugar, which gathers in cancer cells inside the body. A special scanner (sometimes attached to a Computerised Tomography scanner) then produces a picture of the body which shows up cancer cells. Not many hospitals have PET scanners yet. If your medical team thinks you need it, you will be referred to one that does.
positron emission tomography. A computer-based scanning procedure that measures regional changes in blood flow to map the neural activities of the living brain.