Real-time proton beam range monitoring by means of prompt-gamma detection with a collimated camera
作者： F Roellinghoff , A Benilov , D Dauvergne , G Dedes , N Freud
DOI: 10.1088/0031-9155/59/5/1327
关键词: Bragg peak 、 Atomic number 、 Beam (structure) 、 Collimated light 、 Proton 、 Neutron 、 Optics 、 Detector 、 Physics 、 Range (particle radiation) 、 Radiological and Ultrasound Technology 、 Radiology Nuclear Medicine and imaging
摘要: Prompt-gamma profile was measured at WPE-Essen using 160 MeV protons impinging a movable PMMA target. A single collimated detector used with time-of-flight (TOF) to reduce the background due neutrons. The target entrance rise and Bragg peak falloff retrieval precision determined as function of incident proton number by fitting procedure independent data sets. Assuming improved sensitivity this camera design greater detectors, precisions 1 2 mm (rms) are expected for clinical pencil beam. TOF improves contrast-to-noise ratio performance method significantly.
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