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Diamond has a potential for dosimetry in advanced radiotherapy techniques, being a solid-state nearly tissue equivalent material, with the possibility to be grown in large diameter wafers by Chemical Vapour Deposition (CVD). A large-area bidimensional dosimeter made of up to two detector-grade adjacent 2.5×2.5cm2 polycrystalline Chemical Vapour Deposited (pCVD) diamond samples, each equipped with...
A YAG:Ce calorimeter with a 6×6 cm2 active area, long 10 cm has been manufactured in order to stop up to 200 MeV protons and to sustain 1MHz particle rate. It consists of four optically separated crystals assembled in the same housing. The YAG:Ce scintillator is promising for charged particle detection applications where high-count rate, good energy resolution and compact photodiode readout, not influenced...
Proton Computed Tomography (pCT) is a new imaging method with a potential for increasing accuracy of treatment planning and patient positioning in hadron therapy. A pCT system with small active area (5cm×5cm) has been already manufactured by authors. Tested under proton beams gave first promising results on radiography and tomographic reconstructions. Recent developments of a second prototype with...
The PRIMA (Proton IMAging) experiment is aimed at developing a proton Computed Tomography (pCT) prototype based on tracking single protons. Approaches to the pCT consist in the use of silicon microstrip detectors to measure the position and direction of individual protons before and after they traverse the phantom, in view to reconstruct the trajectory of each proton, and a calorimeter for measuring...
PRIMA project is an Italian project funded by INFN and MIUR (PRIN 2006), which developed a proton Computed Tomography (pCT) prototype based on tracking the single proton. PRIMA approaches to the pCT consist in the use of silicon detectors, which measure the energy and position of individual protons before and after they traverse the object. The device consists of a silicon microstrip tracker, used...
Proton Computed Tomography (pCT) is an imaging method under investigation with the aim to improve the accuracy of treatment planning and patient positioning in hadron therapy. A pCT system should be capable to measure tissue electron density with an accuracy better than 1% and with a spatial resolution better than 1mm. A first apparatus based on a silicon tracker and a YAG:Ce crystal calorimeter,...
Today, there is a steadily growing interest in the use of proton beams for tumor therapy, as they permit to tightly shape the dose delivered to the target reducing the exposure of the surrounding healthy tissues. Nonetheless, accuracy in the determination of the dose distribution in proton-therapy is up to now limited by the uncertainty in stopping powers, which are presently calculated from the photon...
Proton computed tomography (pCT) is a medical imaging method, based on the use of proton beams with kinetic energy of the order of 250 MeV, aimed to directly measure the stopping power distribution of tissues (presently calculated from X-rays attenuation coefficients), thus improving the accuracy of treatment planning in hadron therapy. A pCT system should be capable to measure tissue electron densities...
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