Beam delivery systems in hadron therapy for cancer treatment
نویسنده
چکیده
Hadron radiotherapy is a cutting-edge cancer treatment method. Proton and carbon ion beams are frequently used in modern therapeutic centers. The Bragg peak at the end of the particle range delivers a higher radiation dose to tumors situated close to critical organs. However, the accuracy of the dose deposition in the tumor volume depends on the irradiation method. The present paper presents a comparison between two totally different beam delivery systems: a passive beam shaping technique, and active scanning. The first system uses a number of passive elements to form a broad beam covering the planned target volume; while, in the case of a fully active system, a narrow pencil beam irradiates small, spatial tumor elements successively. Raster scanning enables optimum compatibility between the irradiated volume and the target volume.
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