Application of a bi-material range compensator to a RTOG phantom for proton therapy

Y. Takada, K. Hotta, Y. Hara, H. Akasaka, T. Kimura, R. Tansho, T. Nihei, T. Himukai & T. Kanai
Background: We often find distortion of dose distribution in proton therapy when we insert a range compensator (abbr. as RC hereafter) with a complex structure. It will induce a possible dose error if we determine a monitor unit of a transmission ionization chamber using a single-point dose calibration[for full text, please go to the a.m. URL]