@misc{oai:repo.qst.go.jp:00071465,
 author = {田島, 英朗 and 吉田, 英治 and 品地, 哲弥 and Futada, Haruhiko and Nagata, Takeshi and 羽石, 秀昭 and 山谷, 泰賀 and 田島 英朗 and 吉田 英治 and 品地 哲弥 and 羽石 秀昭 and 山谷 泰賀},
 month = {May},
 note = {We are developing the OpenPET, which can provide an open space observable and accessible to the patient during positron emission tomography (PET) measurement. As one possible application of the OpenPET, we are aiming at tumor tracking by means of PET. The PET imaging normally takes several minutes for data acquisition, data transferring, image reconstruction, and displaying the image. On the other hand, our goal is to perform acquisition through displaying in less than a second. In this study, we proposed a real-time imaging system for the OpenPET and implemented on a small OpenPET prototype. In the proposed system, real-time reconstruction system was implemented on graphics processing unit (GPU) by the use of compute unified device architecture (CUDA). The one-pass 3D list-mode dynamic row-action maximum likelihood algorithm (LM-DRAMA) was employed for the reconstruction algorithm. In the real-time imaging system, the data transfer control system limits the event counts to be used in the reconstruction step and the reconstructed images are properly intensified by using the ratio of the used counts to the total counts. The prototype system showed that the real-time monitoring of a moving radioactive source with a frame rate of 2.0 frames per second and a delay of 2.1 s., 19th real-time conference},
 title = {GPU-accelerated Real-time Imaging System for the OpenPET Toward Tumor-tracking Radiotherapy},
 year = {2014}
}