Scanned Ion Beam Therapy of Moving Targets with Beam Tracking
نویسندگان
چکیده
منابع مشابه
Robustness of target dose coverage to motion uncertainties for scanned carbon ion beam tracking therapy of moving tumors.
Beam tracking with scanned carbon ion radiotherapy achieves highly conformal target dose by steering carbon pencil beams to follow moving tumors using real-time magnetic deflection and range modulation. The purpose of this study was to evaluate the robustness of target dose coverage from beam tracking in light of positional uncertainties of moving targets and beams. To accomplish this, we simul...
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Scanned carbon ion radiotherapy beams provide highly conformal dose distributions for stationary tumors and excellent sparing of nearby normal tissues due to the sharp energy-loss maximum (Bragg peak) near the end of the particle range and minimal lateral Coulomb scattering. For moving targets (e.g., respiratory motion) treatment delivery with scanned ion beams becomes considerably more complex...
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Motion mitigation strategies are needed to fully realize the theoretical advantages of scanned ion beam therapy for patients with moving tumors. The purpose of this study was to determine whether a new four-dimensional (4D) optimization approach for scanned-ion-beam tracking could reduce dose to avoidance volumes near a moving target while maintaining target dose coverage, compared to an existi...
متن کاملDosimetric precision of an ion beam tracking system
BACKGROUND Scanned ion beam therapy of intra-fractionally moving tumors requires motion mitigation. GSI proposed beam tracking and performed several experimental studies to analyse the dosimetric precision of the system for scanned carbon beams. METHODS A beam tracking system has been developed and integrated in the scanned carbon ion beam therapy unit at GSI. The system adapts pencil beam po...
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The treatment of moving tumors with a scanned ion beam is challenging due to interplay effects and changing beam range. We propose multigating, as a method for 4D-treatment optimization and delivery. In 3D beam tracking, tracking vectors are added during delivery to beam spot positions based on the detected motion phase. This has the disadvantage of dose errors in case of complex motion pattern...
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