In particle therapy, a particle accelerator is used to speed up protons or ions to high velocities. These particles then form a beam directed precisely at the tumor. Due to the physical characteristics of these particles, they deposit most of their energy at a specific depth (the Bragg peak), beyond which there is a rapid fall-off in radiation dose. This precise targeting makes particle therapy highly effective in treating localized, hard-to-reach, or radioresistant tumors.
