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arXiv · 0809.0185

Monitoring the Bragg peak location of 73 MeV/u carbon ions by means of prompt $γ$-ray measurements

E. Testa·M. Bajard·M. Chevallier·D. Dauvergne·F. Le Foulher·J. -C. Poizat·C. Ray·M. Testa·N. Freud·J. -M. Létang
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Abstract

By means of a time-of-flight technique, we measured the longitudinal profile of prompt $γ$-rays emitted by 73 MeV/u $^{13}$C ions irradiating a PMMA target. This technique allowed us to minimize the shielding against neutrons and scattered $γ$-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.

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E. Testa, M. Bajard, M. Chevallier, D. Dauvergne, F. Le Foulher, J. -C. Poizat, C. Ray, M. Testa, N. Freud, J. -M. Létang. 2008-09-01. Monitoring the Bragg peak location of 73 MeV/u carbon ions by means of prompt $γ$-ray measurements. https://doi.org/10.1063/1.2975841

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