Particle Therapy 2017

Dose Escalation Study at NIRS

For the purpose of finding an appropriate dose level, dose escalation studies have been performed at NIRS. Radiation dose was escalated by increasing the fraction size, while keeping both the fraction number and the length of treatment constant . The treatment was delivered 4 days a week and the radiation dose was increased in increments of 5 to 10% up to the dose level at which tolerance might be reached. In recent years, the average number of treatment fractions per patient has been around 13 and the average treatment period about 3 weeks .

courtesy of H. Tsujii, 2011