@article{oai:repo.qst.go.jp:00044678,
 author = {Muraishi, Hiroshi and Hasegawa, Tomoyuki and Fukushima, Yasuhiro and Yoda, Kazushige and Yamaya, Taiga and Yoshida, Eiji and Murayama, Hideo and et.al and 村石 浩 and 長谷川 智之 and 山谷 泰賀 and 吉田 英治 and 村山 秀雄},
 issue = {4},
 journal = {Medical Imaging Technology},
 month = {Sep},
 note = {We propose a new method for measuring the orientation angles of rigid body motion (e.g., that of a human head) for medical applications. This method employs one optical camera and one solid marker, unlike the conventional method, in which two or more cameras and markers are used. We expect that this method should be useful when the subject is placed in a long,narrow space and the conventional method cannot be employed. In this report, we describe the principles of our new motion measurement method and discuss theresults of experiments to evaluate the tracking accuracy. We demonstrate that the RMS accuracy for the orientation angle is on the order of 0.5 degrees and that this method is therefore suitable for head motion correction in positron emission tomography(PET) brain imaging.},
 pages = {320--328},
 title = {New Tracking Method for Head Motion Using a Single Camera and a Solid Marker},
 volume = {24},
 year = {2006}
}