Are X-rays (photons) as effective as protons in destroying tumors?
X-rays and protons can be equally effective in destroying cancer tumors. The difference is that X-ray treatments damage more healthy tissue in the process. X-rays release much of their energy quickly after penetrating the skin, damaging healthy tissue and organs on their way to the tumor and, again, as they leave the body. Protons can be precisely directed to release most of their energy when they reach the tumor. Because there is much less damage to healthy tissue, a higher dose often can be delivered with protons, leading to more effective treatment.
