125 research outputs found
Monitoring the Bragg peak location of 73 MeV/u carbon ions by means of prompt -ray measurements
By means of a time-of-flight technique, we measured the longitudinal profile
of prompt -rays emitted by 73 MeV/u C ions irradiating a PMMA
target. This technique allowed us to minimize the shielding against neutrons
and scattered -rays, and to correlate prompt gamma emission to the ion
path. This correlation, together with a high counting rate, paves the way
toward real-time monitoring of the longitudinal dose profile during ion therapy
treatments. Moreover, the time correlation between the prompt gamma detection
and the transverse position of the incident ions measured by a beam monitor can
provide real-time 3D control of the irradiation.Comment: to be published in Applied Physics Letter
Development of a Compton camera for medical applications based on silicon strip and scintillation detectors
International audienceA Compton camera is being developed for the purpose of ion-range monitoring during hadrontherapy via the detection of prompt-gamma rays. The system consists of a scintillating fiber beam tagging hodoscope, a stack of double sided silicon strip detectors (90 Ă‚ 90 Ă‚ 2 mm 3 , 2 Ă‚ 64 strips) as scatter detectors, as well as bismuth germanate (BGO) scintillation detectors (38 Ă‚ 35 Ă‚ 30 mm 3 , 100 blocks) as absorbers. The individual components will be described, together with the status of their characterization
Real-Time Online Monitoring of the Ion Range by Means of Prompt Secondary Radiations
International audiencePrompt secondary radiations such as gamma rays and protons can be used for ion-range monitoring during ion therapy either on an energy-slice basis or on a pencil-beam basis. We present a review of the ongoing activities in terms of detector developments, imaging, experimental and theoretical physics issues concerning the correlation between the physical dose and hadronic processe
On-line X-ray focal spot assessment based on deconvolution using standard imaging devices
International audienc
Signal-to-noise ratio criterion for the optimization of dual-energy acquisition using virtual X-ray imaging: application to glass wool
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A hybrid approach to simulate multiple photon scattering in X-ray imaging
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