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has been cited by the following article:

• TITLE: Position Verification of the RADPOS 4-D In-Vivo Dosimetry System

  AUTHORS: Ryosuke Kohno, Hidenori Yamaguchi, Kana Motegi, Fumiya Tanaka, Tsunemichi Akita, Yuki Nagata, Kenji Hotta, Tomoko Miyagishi, Shie Nishioka, Takeshi Dohmae, Tetsuo Akimoto

  KEYWORDS: RADPOS, MOSFET, In-Vivo Dosimetry, Position Sensor, Photon Therapy, Proton Beam Therapy

  JOURNAL NAME: International Journal of Medical Physics, Clinical Engineering and Radiation Oncology, Vol.4 No.4, November 11, 2015

  ABSTRACT: The accuracy of the position measurements obtained by the radiation positioning system (RADPOS) was evaluated under static and dynamic conditions. In the static verifications, the RADPOS was fixed to the treatment couch in a photon treatment room and a proton treatment room, and was translocated with the treatment couch in x, y and z directions. Because the presence of magnetic and/or electrically conductive materials can cause a systematic shift in the measured position by distorting the RADPOS transmitted field, the effect of metals on the performance of the positioning system was also investigated. Dynamic verification was performed using the couch drive and a dynamic anthropomorphic thorax phantom. We thus confirmed the utility of RADPOS as a position sensor to perform in vivo dosimetry.