Oggi sono 25 anni dalla scomparsa di Vittorio Caprioli
Il tempo a Roma
Tomografia a emissione di positroni
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)
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
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http://photos.prnewswire.com/prnh/20130307/600769 (PR Newswire - 08/09/2014) Leggi
Diagnostic imaging is being identified as one of the fastest growing market of all healthcare sectors. Advances in diagnostic imaging technology have redefined how physicians diagnose and treat some of the most life threatening diseases such as cancer and heart disease and they have nearly eliminated the need for exploratory surgery. Imaging techniques would be therefore able us to diagnose, treat and cure patients without causing any harmful side effects. The different diagnostic imaging modalities include X-rayray systems, Computed Tomography (CT) Scanners, Magnetic Resonance Imaging (MRI) systems, Ultrasound systems and Nuclear imaging systems. Globally among the diagnostic imaging techniques, X-ray is the most frequently used imaging procedure with more than 100 million X-ray exams per year followed by MRI, PET, SPECT, CT and nuclear medicine. This indicates that diagnostic imaging market contributes to its highest share among all imaging techniques. The global diagnostic imaging... (PR Newswire - 18/08/2014) Leggi