Tomografia a emissione di positroni

La tomografia a emissione di positroni (o PET, dall'inglese "Positron Emission Tomography") è una tecnica di medicina nucleare e di diagnostica medica utilizzata per la produzione di bioimmagini (immagini del corpo). La PET fornisce informazioni di tipo fisiologico, a differenza di TC e RM che invece forniscono informazioni di tipo morfologico del distretto anatomico esaminato. Con l'esame PET si ottengono mappe dei processi funzionali all'interno del corpo.
La procedura inizia con l'iniezione di un radiofarmaco formato da un radio-isotopo tracciante con emivita breve, legato chimicamente a una molecola attiva a livello metabolico, detta vettore.
Dopo un tempo di attesa, durante il quale la molecola metabolicamente attiva (spesso uno zucchero) raggiunge una determinata concentrazione all'interno dei tessuti organici da analizzare, il soggetto viene posizionato nello scanner.
L'isotopo di breve vita media decade, emettendo un positrone. Dopo un percorso che può raggiungere al massimo pochi millimetri, il positrone si annichila con un elettrone, producendo una coppia di fotoni gamma entrambi di energia 511 KeV emessi in direzioni opposte tra loro (fotoni back to back). (fonte: Wikipedia)

Mediso Unveils the New MultiScan LFER 150 PET/CT Research Tool

     (Logo: http://photos.prnewswire.com/prnh/20141017/712245-a )      (Photo: http://photos.prnewswire.com/prnh/20141017/712245-b ) (PR Newswire - 17/10/2014) Leggi

Radiation Detection Markets: 2014-2021

     (Logo: http://photos.prnewswire.com/prnh/20130307/600769 ) This report follows on from successful reports on radiation detection equipment and radiation detection materials in 2013. It identifies the new opportunities that continue to emerge from the sales of equipment designed to detect ionization radiation. In many ways the medical detection equipment market is quite mature. But its customers can often be found in areas that change with shifting socioeconomic conditions. For example, a major market for radiation detection is in the nuclear power industry; a sector that rises and falls according to the energy policies of the day. Another major purchaser of radiation detection gear is healthcare, a demand that is boosted by the aging population in developed countries. (PR Newswire - 09/10/2014) Leggi

Enterprise Medical Image Viewers Evolve from Mere PACS Add-Ons to Full-Fledged Solutions, says Frost & Sullivan

Logo - http://photos.prnewswire.com/prnh/20141007/150836 (PR Newswire - 08/10/2014) Leggi

Medical Imaging Markets (X-Ray, CT, MRI, Ultrasound, PET, SPECT, Others) - 2014 Report

The contribution of imaging to medical practice has made it a continuously growing market with new technologies launched all the time. Imaging scans make possible early and more accurate diagnoses, which, in turn, may lead to optimized treatment regimes. The evolution of medical imaging modalities - x-rays, mammographies, CT scans, MRIs, SPECT and PET scans - has had a major impact on the diagnosis and treatment of disease. Highly detailed imaging, especially at the molecular level, is enabling health care givers to visualize disease in new ways. This report, Medical Imaging Markets, analyzes the current and potential world markets for medical imaging systems, including x-ray, mammography, fluoroscopy, CT, MRI, Ultrasound, PET and SPECT, and fusion systems. This report generally forecasts future growth to 2018. Market segments covered include the world, US, European, BRIC, and Japanese markets. For each of these modalities, the report provides current market size based on revenues to... (PR Newswire - 24/09/2014) Leggi

Frost & Sullivan: Ultrasound is a Key Imaging Modality in Europe

Logo - http://photos.prnewswire.com/prnh/20140909/144264 (PR Newswire - 09/09/2014) Leggi
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Altri nomi: PET