Zobrazeno 1 - 10
of 33
pro vyhledávání: '"Hiraku Kawamura"'
Autor:
Masayuki, Shimosegawa, Koji, Sasaki, Kenta, Takada, Takamitsu, Hara, Masato, Sugino, Hiraku, Kawamura, Sho, Maruyama, Hayato, Tsuno
Publikováno v:
Igaku butsuri : Nihon Igaku Butsuri Gakkai kikanshi = Japanese journal of medical physics : an official journal of Japan Society of Medical Physics. 42(3)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::cfb9ae6eac7271a6fc0efd39578722ba
https://pubmed.ncbi.nlm.nih.gov/36184430
https://pubmed.ncbi.nlm.nih.gov/36184430
Publikováno v:
Japanese Journal of Radiological Technology. 77:811-820
Purpose In our proton beam therapy center, we use imaging plates (IP) for dose verification of field matching in irradiation (called patch-field technique). In this study, a polymer gel dosimeter, which can perform three- dimensional dose distributio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dd62db3e7e8eb836f185edb5bd617844
https://doi.org/10.6009/jjrt.2021_jsrt_77.8.811
https://doi.org/10.6009/jjrt.2021_jsrt_77.8.811
Autor:
Katsumi Miyamoto, Tatsuya Fujisaki, Yoshikazu Shimada, Hitoshi Sato, Akira Matsumura, Hiraku Fuse, Yoshiyuki Ishimori, Takeji Sakae, Kazuya Shinoda, Takaoki Takanashi, Masahiko Monma, Hiraku Kawamura
Publikováno v:
International Journal of Medical Physics, Clinical Engineering and Radiation Oncology. :261-272
Polymer gels are three-dimensional dosimetric tools. The purpose of the present study was to investigate the temperature dependence of polymer gels during scanning Magnetic Resonance Imaging. Prepared gels were irradiated with a 6MV X-ray beam at int
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::486cb243d12766efecba0ebac1bec993
https://doi.org/10.4236/ijmpcero.2018.72022
https://doi.org/10.4236/ijmpcero.2018.72022
Autor:
Takaoki Takanashi, Hiraku Kawamura
Publikováno v:
IFMBE Proceedings ISBN: 9789811090349
We have proposed a new gelatin phantom for evaluating the spatial resolution of Optical Computed Tomography (OCT), MRI and X-ray CT (X-CT) as a gel dosimeter readout device. In addition, MTF evaluation was conducted using the proposed gelatin phantom
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::21bfee23be181841314f1bd5bc3c727c
https://doi.org/10.1007/978-981-10-9035-6_6
https://doi.org/10.1007/978-981-10-9035-6_6
Publikováno v:
Radiological physics and technology. 11(4)
We investigated the effect of magnesium chloride (MgCl2) on the nuclear magnetic resonance dose–response of polyacrylamide-type (PAGAT, NIPAM, and VIPET) gel dosimeters containing acrylamide, N-isopropylacrylamide, and N-vinylpyrrolidone as a monom
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b842ab8a3f19bcbc48e7fd00d2421bde
https://pubmed.ncbi.nlm.nih.gov/30182145
https://pubmed.ncbi.nlm.nih.gov/30182145
Publikováno v:
Radiological physics and technology. 11(3)
Although slice thickness accuracy is important for the performance of magnetic resonance imaging systems, long scan times are required to perform reliable measurements. Inclined slabs and wedges are conventionally used as test devices to obtain slice
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b7a485efade32c665e93be166267876f
https://pubmed.ncbi.nlm.nih.gov/29923022
https://pubmed.ncbi.nlm.nih.gov/29923022
Autor:
Shin-ichiro Hayashi, Takaoki Takanashi, Kazuya Hayashi, Hiroaki Gotoh, Hiraku Kawamura, Mikio Nemoto
Publikováno v:
Journal of Physics: Conference Series. 1305:012020
When a radiochromic micelle gel dosimeter is employed for optical computed tomography (CT) measurement, cupping (or dishing) artifacts appear at areas irradiated with a high dose. Anti-scatter polarizer correction is employed to remove scatter signal
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3d0082510f8471a314ce35790ac40464
https://doi.org/10.1088/1742-6596/1305/1/012020
https://doi.org/10.1088/1742-6596/1305/1/012020
Autor:
Akira Matsumura, Masaya Ishida, Hiraku Kawamura, Toshiyuki Terunuma, Takeji Sakae, Yasushi Shibata
Publikováno v:
Applied Radiation and Isotopes. 77:94-102
It is difficult to obtain images of thin slices from measurement of spin–spin relaxation (R2) with magnetic resonance imaging (MRI) using the traditional dose reading method of polymer gel dosimetry. In this study, the dose reading method was perfo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6d9451fb57bc1fe2a308ff1eca74100e
https://doi.org/10.1016/j.apradiso.2013.02.011
https://doi.org/10.1016/j.apradiso.2013.02.011
Publikováno v:
Radiological Physics and Technology. 6:461-466
Perfusion-weighted imaging (PWI) by use of arterial spin labeling (ASL) has been introduced to the clinical setting. However, it is not widely available because it requires specialized pulse sequences. Imaging using a time-spatial labeling inversion
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a97686f02f8114928741cb357d19f4c2
https://doi.org/10.1007/s12194-013-0219-0
https://doi.org/10.1007/s12194-013-0219-0
Autor:
Hiraku Kawamura, Hiroshi Yoshii, Tsuyoshi Hamano, M. Suda, Naoki Kunugita, Ichiro Yamaguchi, Minoru Miyake, Hitoshi Sato
Electron Paramagnetic Resonance (EPR) tooth dosimetry is being developed as a device to rapidly assess large populations that were potentially exposed to radiation during a major radiation accident or terrorist event. While most exposures are likely
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::191f10a9bdadd06883ab334326d62825
https://europepmc.org/articles/PMC5225981/
https://europepmc.org/articles/PMC5225981/