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TY - CPAPER AU - Saotome, N. S. AU - Furukawa, T. AU - Hara, Y. AU - Mizushima, K. AU - Noda, K. AU - Saraya, Y. AU - Shirai, T. AU - Tansho, R. TI - Development of QA System for the Rotating Gantry for Carbon Ion Therapy at NIRS J2 - Proc. of International Beam Instrumentation Conference (IBIC2015), Melbourne, Australia, 13-17 September 2015 AB - At the National Institute of Radiological Sciences (NIRS), we have been developing the rotating-gantry system for carbon-ion radiotherapy. This system is equipped with a three-dimensional pencil beam scanning irradiation system. To ensure the treatment quality, calibration of the primary dose monitor, range check, dose rate check, machine safety check, and some mechanical tests should be performed efficiently. For this purpose, we have developed a measurement system dedicated for quality assurance (QA) of this gantry system. The ion beam's dose output was calibrated by measurement using an ionization chamber. A Farmer type ionization chamber was inserted into the center of a plastic water phantom. The thickness of the phantom could be changed so that it employs both calibration of the output at entrance and output checking at center of the irradiation field. The ranges of beams are verified using a CCD camera and a scintillator system. From the taken images, maximum gradient points are determined by some image processing and compared with reference data. In this paper, we describe consideration of the daily QA for the rotating-gantry. PB - JACoW CY - Geneva, Switzerland SP - 66 EP - 69 KW - ion KW - radiation KW - brightness KW - target KW - operation DA - 2016/01 PY - 2016 SN - 978-3-95450-176-2 DO - 10.18429/JACoW-IBIC2015-MOPB016 UR - http://accelconf.web.cern.ch/AccelConf/IBIC2015/papers/mopb016.pdf ER -