PET scanning

PET scanning

Positron emission tomography. This is a diagnostic imaging technique based on the detection of gamma rays produced by the annihilation of positively charged electrons (positrons) emitted by specially prepared radioactive substances that have been injected intravenously. Substances labelled with oxygen-15, fluorine-18, carbon-11 or nitrogen-13 are most commonly used. PET scanning provides uniquely valuable images of tissues showing local metabolic activity, especially in the brain, the rate of glucose and oxygen consumption at various sites, blood flow, neurotransmitter activity and the fate of drugs. Positron-emitting substances have a very short half-life and must be prepared on site in a cyclotron. This limits the application of the technique.
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The PET scanning agent used in the study, [18F]flutemetamol (Vizamyl), binds with high affinity to beta-amyloid but rapidly clears from normal brain tissue; it was approved in October 2013 for PET imaging of the brain in adults being evaluated for Alzheimer's disease and dementia.
10,11 Hutchings et al showed that the treatment changed as a result of PET scanning in 9% of 99 prospectively recruited patients, and in 17% of patients who underwent integrated PET/CT, resulting in an upstaging and intensification of therapy.
NHS Wales Shared Services Partnership, hosted by Velindre NHS Trust, may advertise a tender opportunity on behalf of Betsi Cadwaladr University Health Board (BCUHB) between April 2013 - March 2014 for a Mobile PET Scanning Service.
Positron Emission Tomography, or PET scanning, is rapidly emerging as one of the most useful forms of diagnostic imaging, especia with regard to diagnosing and managing cancer.
For patients already diagnosed with cancer, PET scanning can help to establish the spread of tumours, aiding treatment planning.
STOCKHOLM -- Appropriate use of PET scanning provides useful diagnostic information in the evaluation of dementia, Dr.
PET scanning is now the standard for studying the brain, heart and cancer, and provides improved diagnosis for epilepsy, Alzheimer's disease, Parkinson's disease, cardiovascular disease and several types of cancers.
Sheng Pin Changlai, a visiting physician in the UCLA department of nuclear medicine, explained that current Medicare regulations require that a chest CT scan be done prior to PET scanning for staging of lung cancer.
Follow-up PET scanning then discerned most cases of Alzheimer's disease.