KOYAMA, Shuji

J-GLOBAL         Last updated: May 8, 2019 at 04:18
 
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Name
KOYAMA, Shuji
E-mail
koyamamet.nagoya-u.ac.jp

Misc

 
Haba T, Koyama S, Otani N
Australasian physical & engineering sciences in medicine   https://doi.org/10.1007/s13246   Aug 2018   [Refereed]
X-ray image evaluation is commonly performed by determining the detective quantum efficiency (DQE). DQE is calculated with a presampled modulation transfer function (MTF), incident photon fluence, and digital noise power spectrum (NPS). Accurate e...
Toda Naohiro, Nakagami Tetsuya, Yamazaki Yoichi, Yoshioka Hiroki, Koyama Shuji
IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES   E101A(7) 1101-1114   Jul 2018   [Refereed]
In X-ray computed tomography, scattered X-rays are generally removed by using a post-patient collimator located in front of the detector. In this paper, we show that the scattered X-rays have the potential to improve the estimation accuracy of the...
Bagarinao Epifanio, Tsuzuki Erina, Yoshida Yukina, Ozawa Yohei, Kuzuya Maki, Otani Takashi, Koyama Shuji, Isoda Haruo, Watanabe Hirohisa, Maesawa Satoshi, Naganawa Shinji, Sobue Gen
FRONTIERS IN HUMAN NEUROSCIENCE   12 148   Apr 2018   [Refereed]
The stability of the MRI scanner throughout a given study is critical in minimizing hardware-induced variability in the acquired imaging data set. However, MRI scanners do malfunction at times, which could generate image artifacts and would requir...
Ariji Yoshiko, Kondo Hisataka, Miyazawa Ken, Tabuchi Masako, Koyama Syuji, Kise Yoshitaka, Togari Akifumi, Gotoh Shigemi, Ariji Eiichiro
INTERNATIONAL JOURNAL OF ORAL SCIENCE   10 https://doi.org/10.1038/s41368   Mar 2018   [Refereed]
OBJECTIVES: An animal experiment clarified that insertion of an orthodontic apparatus activated the trigeminal neurons of the medulla oblongata. Orthodontic tooth movement is known to be associated with the sympathetic nervous system and controlle...
Yamamoto Seiichi, Koyama Shuji, Yabe Takuya, Komori Masataka, Tada Junki, Ito Shiori, Toshito Toshiyuki, Hirata Yuho, Watanabe Kenichi
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT   883 48-56   Mar 2018   [Refereed]
Luminescence of water during irradiations of proton-beams or X-ray photons lower energy than the Cerenkov-light threshold is promising for range estimation or the distribution measurements of beams. However it is not yet obvious whether the intens...

Conference Activities & Talks

 
Application of the new CT technique using the Monte Carlo simulation
HAYASHI Daiki, KOYAMA Shuji
2011 Nagoya-YonseiUniversity Research Exchange Meetings on Health Sciences   4 Nov 2011   
Estimation of Dose Distribution in CTDI Phantom in CBCT using Monte Carlo Simulation
HABA Tomonobu, KOYAMA Shuji
2011 Nagoya-YonseiUniversity Research Exchange Meetings on Health Sciences   4 Nov 2011   
Energy Estimation in a Phantom in X-ray CT : Analysis using Monte Carlo Method
KONDO Shinpei, KOYAMA Shuji
2011 Nagoya-YonseiUniversity Research Exchange Meetings on Health Sciences   4 Nov 2011   
Evaluation of maximum dose position shifting in phantom in X-ray CT
HABA Tomonobu, KOYAMA Shuji
6th International Symposium on Radiation Safety and Detection Technology(ISORD-6)   12 Jul 2011   
Estimation of Effective Energy in Phantom in X-ray CT Using Monte Carlo Simulation
KONDO Shinpei, KOYAMA Shuji
6th International Symposium on Radiation Safety and Detection Technology(ISORD-6)   12 Jul 2011