@article{oai:repo.qst.go.jp:00046366,
 author = {Mori, Shinichiro and Inaniwa, Taku and Kuwae, Tsunekazu and Matsuzaki, Yuka and Kumagai, Motoki and Furukawa, Takuji and Shirai, Toshiyuki and Noda, Kouji and 森 慎一郎 and 稲庭 拓 and 桑江 常和 and 松崎 有華 and 熊谷 始紀 and 古川 卓司 and 白井 敏之 and 野田 耕司},
 issue = {2},
 journal = {Australasian Physical & Engineering Sciences in Medicine},
 month = {Jun},
 note = {To increase the accuracy of carbon ion beam scanning therapy, we have developed a GUI (graphical user interface)-based digitally-reconstructed radiograph (DRR) software system for use in routine clinical practice at our center. The DRR software is used in particular scenarios in the new treatment facility to achieve the same level of geometrical accuracy at the treatment as at the imaging session. DRR calculation is implemented simply as the summation of CT image voxel values along the x-ray projection ray. Since we implemented GPU (graphics processing unit)-based computation, the DRR images are calculated with a speed sufficient for the particular clinical practice requirements. Since high spatial resolution flat panel detector (FPD) images should be registered to the reference DRR images in patient setup process in any scenarios, the DRR images also needs higher spatial resolution close to that of FPD images. To overcome the limitation of the CT spatial resolution imposed by the CT voxel size, we applied image processing to improve the calculated DRR spatial resolution. The DRR software introduced here enabled patient positioning with sufficient accuracy for the implementation of carbon-ion beam scanning therapy at our center.},
 pages = {221--229},
 title = {Development of Digital Reconstructed Radiography Software at New Treatment Facility for Carbon-ion Beam Scanning of National Institute of Radiological Sciences},
 volume = {35},
 year = {2012}
}