Therapeutic radiation is categorized into either a photon beam, or a particle beam. A photon beam is a kind of electromagnetic wave, and a particle beam is made up of high-energy ions. The former includes X-rays and gamma rays, and the latter includes protons and heavy ions, etc.
Heavy ions go through the human body at high speeds, leaving only a small amount of energy behind in the body tissue to a certain depth. They provide a large amount of energy just before stopping, making a dose peak. Heavy ions have two to three times higher cancer killing effect than X-ray and proton beams.
Our facility selects carbon ion as heavy ion beam.