Positron emission tomography (PET) [1] is a functional imaging technique that uses radioactive substances known as radiotracers to visualize and measure changes in metabolic processes, and in other physiological activities including blood flow, …

• Positron emission tomography (PET) is a technique that measures physiological function by looking at blood flow, metabolism, neurotransmitters, and radiolabelled drugs. PET offers quantitative analyses, allowing relative changes over time to be monitored as a disease process evolves or in response to a specific stimulus.

PET is a type of nuclear medicine procedure that measures metabolic activity of the cells of body tissues. Used mostly in patients with brain or heart conditions and cancer, PET helps to visualize the biochemical changes taking place in the body.

2016年9月3日 · Positron emission tomography (PET) offers several unique advantages compared with other imaging modalities. PET measures the two annihilation photons that are produced back-to-back after positron emission from a radionuclide tagged tracer molecule, which is chosen to mark a specific function in the body on a biochemical level . Hence, PET ...

2016年3月6日 · Photons form the basis for single photon emission computed tomography (SPECT), while positron emission forms the basis for PET. Emitted from an unstable nucleus, positrons are particles with a mass of an electron, but a positive charge, rather than a …

Positron emission tomography (PET) is a nuclear medical imaging technique for quantitative measurement of physiologic parameters in vivo (an overview of principles and applications can be found in [1]), based on the detection of small amounts of …

2025年2月26日 · Positron emission tomography (PET) scanning is an imaging technique widely used in oncology. This technique uses radiotracers to measure various metabolic processes in the body, providing insights into metabolic activity, blood flow, and chemical composition. PET scanning enables the evaluation of both physiological and pathological processes.

2025年4月6日 · Positron emission tomography (PET) is a modern non-invasive imaging technique for quantification of radioactivity in vivo. It involves the intravenous injection of a positron-emitting radiopharmaceutical, waiting to allow for systemic distribution, and then scanning for detection and quantification of patterns of radiopharmaceutical ...

Positron emission tomography (PET) is a to-mographic imaging technique which allows non-invasive quantitative assessment of bio-chemical and functional processes. A range of positron emitters are available for use but 18F (combined with FDG – uorodeoxyglucose) is the most commonly used.

2016年5月7日 · This chapter looks into the physical principles of this technique, factors that affect the quality of the images produced and some of the artefacts and problems that may be encountered.