Radiation therapy, which has been established as one of the three major cancer treatments, has made significant progress with the aim of improving precision and minimizing damage to healthy tissue. While the word "radiation" may evoke fear, the X-rays most commonly used in treatment are electromagnetic waves--same as light--and are composed of photons. This field aims to develop novel, minimally invasive treatments that utilize such photons and quantum particles. For more details, please refer to section Research Activities below.