Zobrazeno 1 - 10
of 13
pro vyhledávání: '"Keita Sakuta"'
Autor:
Wataru Mitsui, Tadanori Takata, Katsuhiro Ichikawa, Yukihiro Matsuura, Hiroki Kawashima, Toshifumi Gabata, Keita Sakuta, Kaori Minehiro, Hiroyuki Hayashi, Kousuke Matsubara, Haruka Nunome
Publikováno v:
Physica Medica. 33:146-151
The present study aimed to investigate whether the in-plane resolution property of iterative reconstruction (IR) of computed tomography (CT) data is object shape-dependent by testing columnar shapes with diameters of 3, 7, and 10cm (circular edge met
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::86aaf31d09f772bde5498cde963af421
https://doi.org/10.1016/j.ejmp.2017.01.001
https://doi.org/10.1016/j.ejmp.2017.01.001
Autor:
Tadanori Takata, Kosuke Matsubara, Keita Sakuta, Hiroji Iida, Kichiro Koshida, Asami Toyoda, Osamu Matsui, Mai Sugai, Haruka Koshida
Publikováno v:
Journal of Applied Clinical Medical Physics
Recently, specific computed tomography (CT) scanners have been equipped with organ‐based tube current modulation (TCM) technology. It is possible that organ‐based TCM will replace the conventional dose‐reduction technique of reducing the effect
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6f8e0872f0956d85ed6d94d20e56767f
http://europepmc.org/articles/PMC5716412
http://europepmc.org/articles/PMC5716412
Autor:
Wataru Mitsui, Keita Sakuta, Tadanori Takata, Hiroji Iida, Jyunsei Horii, Haruka Koshida, Kousuke Matsubara, Katsuhiro Ichikawa, Tomohiro Yokoi, Hiroyuki Hayashi
Publikováno v:
Japanese Journal of Radiological Technology. 68:404-412
The purpose of this study was to evaluate the image quality of an iterative reconstruction method, the iterative reconstruction in image space (IRIS), which was implemented in a 128-slices multi-detector computed tomography system (MDCT), Siemens Som
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6ce4207fbcad0831595f243ff6b6767e
https://doi.org/10.6009/jjrt.2012_jsrt_68.4.404
https://doi.org/10.6009/jjrt.2012_jsrt_68.4.404
Autor:
Keiichi Kawai, Kichiro Koshida, Hiroyuki Hayashi, Tomoyuki Yamamoto, Haruka Koshida, Junsei Horii, Tadanori Takata, Kosuke Matsubara, Keita Sakuta
Publikováno v:
Japanese Journal of Radiological Technology. 68:59-64
We evaluated exposed-radiation doses on dual-source cardiac computed tomography (CT) examinations with prospective electrocardiogram (ECG)-gated fast dual spiral scans. After placing dosimeters at locations corresponding to each of the thoracic organ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dd6f10c83a5ee2620c67e25163a1b3ed
https://doi.org/10.6009/jjrt.2012_jsrt_68.1.59
https://doi.org/10.6009/jjrt.2012_jsrt_68.1.59
An image-processing technique for separating bones from soft tissue in static chest radiographs has been developed. The present study was performed to evaluate the usefulness of dynamic bone images in quantitative analysis of rib movement. Dynamic ch
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b39b88c6dcb28e58ffb819315877567b
https://europepmc.org/articles/PMC4478937/
https://europepmc.org/articles/PMC4478937/
Publikováno v:
Nihon Hoshasen Gijutsu Gakkai zasshi. 70(11)
The purpose of this study was to evaluate the dose output according to the object using organ-based tube-current modulation in thoracic CT. The output doses with elliptical and circular shaped phantoms were measured using an ionizing CT chamber. The
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::017d3a49ba83b0c73e821f9e30e335c3
https://pubmed.ncbi.nlm.nih.gov/25410337
https://pubmed.ncbi.nlm.nih.gov/25410337
Autor:
Shigeru Sanada, Keita Sakuta, M. Mitsutaka, Rie Tanaka, Hiroki Kawashima, Makoto Oda, Kenji Suzuki
Publikováno v:
Medical Imaging: Image Processing
Rib movement during respiration is one of the diagnostic criteria in pulmonary impairments. In general, the rib movement is assessed in fluoroscopy. However, the shadows of lung vessels and bronchi overlapping ribs prevent accurate quantitative analy
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9587e2bc4f40a9c67bffe1909a906941
https://doi.org/10.1117/12.2043202
https://doi.org/10.1117/12.2043202
Publikováno v:
2013 IEEE Nuclear Science Symposium and Medical Imaging Conference (2013 NSS/MIC).
Purpose: A recently developed image processing methodology, the bone suppression technique, can suppress the conspicuity of bones on chest radiographs, creating sort of soft-tissue images obtained by the dual-energy subtraction technique. This study
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9212294deed093c44bb000d02eb5f3fe
https://doi.org/10.1109/nssmic.2013.6829305
https://doi.org/10.1109/nssmic.2013.6829305
Autor:
Junsei Horii, Kosuke Matsubara, Osamu Matsui, Keita Sakuta, Haruka Koshida, Katsuhiro Ichikawa, Hiroji Iida, Tadanori Takata, Kichiro Koshida
Publikováno v:
Journal of Applied Clinical Medical Physics
One‐hundred‐and‐twenty‐eight–section dual X‐ray source computed tomography (CT) systems have been introduced into clinical practice and have been shown to increase temporal resolution. Higher temporal resolution allows low‐dose spiral m
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::da7228eb3156603bfaaec9099785656b
https://pubmed.ncbi.nlm.nih.gov/22955662
https://pubmed.ncbi.nlm.nih.gov/22955662
Autor:
Hiroko Kawashima, Katsuhiro Ichikawa, Tomoyuki Yamamoto, Shigeru Sanada, M. Kawamura, Kousuke Matsubara, Norio Hayashi, Keita Sakuta, Rie Tanaka, Shuhei Minami
Publikováno v:
SPIE Proceedings.
This report presents the fundamental temporospatial characteristics of a dynamic flat-panel detector (FPD) system. We investigated the relationship between pixel value and X-ray pulse output, and examined reproducibility, dependence on pulse width, t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6f9520e11cc9545042d860cef2bc58a3
https://doi.org/10.1117/12.844603
https://doi.org/10.1117/12.844603