@misc{oai:repo.qst.go.jp:00070325,
 author = {Tashima, Hideaki and Yoshida, Eiji and Kinouchi, Shoko and Suga, Mikio and Nishikido, Fumihiko and Inadama, Naoko and Murayama, Hideo and Yamaya, Taiga and 田島 英朗 and 吉田 英治 and 木内 尚子 and 菅 幹生 and 錦戸 文彦 and 稲玉 直子 and 村山 秀雄 and 山谷 泰賀},
 month = {Nov},
 note = {The OpenPET geometry has potential for real-time tracking of targeted tumors and in situ visualization of dose distribution
in radiation therapy. For the real-time imaging system, we are intending to use one-pass list-mode dynamic row-action
maximum likelihood algorithm (DRAMA) and implement it using general-purpose computation on graphics processing
unit techniques. However, it is difficult to consistently reconstruct in real-time because the amount of data acquired in PET
scan can be large depending on the activity. In this study, we developed a system to control the data used in the
reconstruction step keeping quantitative performance. In the proposed system, data transfer control system limits the event
count to be used in the reconstruction step according to the reconstruction speed, and the reconstructed images are properly
intensified by using ratio of the used count to the total count. We implemented the system on a small OpenPET prototype
system and evaluated the performance in terms of the real-time tracking ability by displaying projection images in which the
intensity was compensated. The intensity of the displayed image was properly correlated with the original event number
without delay. By the conference, we will incorporate real-time reconstruction system using one-pass list-mode DRAMA to
display 3D images in real-time., 2010IEEE NSS&MIC},
 title = {Real-Time Imaging System for a Small OpenPET Prototype},
 year = {2010}
}