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27 June 1988 High Energy Imaging Using Tomographic Techniques : Discussion And Preliminary Results
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We describe a new system for high Energy Imaging in Radiotherapy treatment. When using this system, a physician will be able to detect the movements of a patient during a radiotherapy treatment session by taking 18 MeV contrast images of the patient within few seconds. The system's detector is a large area, flat device made of parallel scintillating optical fibres lying on a plane perpendicular to the X-ray beam and located behind the patient. These fibres emit light through their extremities when crossed by high energy particles or photons. This light is collected with photodiodes, whose electrical signal is amplified, sampled and hold in synchronism with the pulsed X-ray beam. Then the signals are digitized by an Analog-to-Digital converter and stored in the memory of a personal computer. The detector, which can rotate around the X-ray beam axis, moves toward another selected position and the data are stored every time. Then a tomographic reconstruction algorithm is run and an image is finally produced a few seconds after its detection. We will discuss the feasability of such a system, using this kind of detectors, and show the first images obtained with this technique.
© (1988) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Alain Staron, Christophe Raymond, and Christian Claudepierre "High Energy Imaging Using Tomographic Techniques : Discussion And Preliminary Results", Proc. SPIE 0914, Medical Imaging II, (27 June 1988);


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