Presentation Commissioning of moving target irradiation with a scanned carbon-ion beams in NIRS-HIMAC

Hara, Yousuke  ,  Furukawa, Takuji  ,  Mizushima, Kota  ,  Mori, Shinichiro  ,  Inaniwa, Taku  ,  Saotome, Naoya  ,  Tansho, Ryohei  ,  Saraya, Yuichi  ,  Shirai, Toshiyuki  ,  Noda, Koji

In moving target irradiation with a scanned ion beam, the interplay effect between the target motion and scanned beams is a major and well-known problem, which can result in over or under dosage in the target volume. To overcome this problem, we developed fast scanning irradiation system with gating system for moving target. We started the treatment of a moving target by scanning irradiation to the first patient as a clinical study on March 4, 2015. In our presentation, the commissioning of moving target irradiation with pencil beam scanning are reported. To ensure the validity of both the delivered dose and the gating system, patient-specific quality assurance (QA) for moving target irradiation requires an additional procedure. We describe a new patient-specific QA procedure for moving target irradiation and experience with patient-specific QA.
The 55th Annual Conference of the Particle Therapy Co-operative Group (PTCOG55)

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