Proton beams are used with success in some ocular pathologies. However, in order to spare the healthy tissues as more as possible, more accurate therapeutic plans, which take into account their physical quality change with the depth in tissue, should be envisaged. In this paper we have measured the physical quality, and its variation with the depth, of the proton therapeutic beam of the Centre Antoine-Lacassagne of Nice (France). The physical quality has been measured by using microdosimetric techniques. Measurements have been performed with a mini TEPC, the sensitive volume of which, of less than 1 mm(3), was filled with tissue-equivalent gas mixture to simulate a tissue diameter of 1 mum. Experimental data show a significant increase of the beam quality in the distal edge of the SOBP.
Microdosimetric measurements of the Nice therapeutic proton beam
DE NARDO, LAURA;TORNIELLI, GIORGIO;
2001
Abstract
Proton beams are used with success in some ocular pathologies. However, in order to spare the healthy tissues as more as possible, more accurate therapeutic plans, which take into account their physical quality change with the depth in tissue, should be envisaged. In this paper we have measured the physical quality, and its variation with the depth, of the proton therapeutic beam of the Centre Antoine-Lacassagne of Nice (France). The physical quality has been measured by using microdosimetric techniques. Measurements have been performed with a mini TEPC, the sensitive volume of which, of less than 1 mm(3), was filled with tissue-equivalent gas mixture to simulate a tissue diameter of 1 mum. Experimental data show a significant increase of the beam quality in the distal edge of the SOBP.
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