Zobrazeno 1 - 10
of 87
pro vyhledávání: '"Hiroshi Kunitomo"'
Autor:
Hiroshi Kunitomo
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 3, Pp 1-41 (2021)
Abstract We show that the tree-level S-matrices of the superstring field theories based on the homotopy-algebra structure agree with those obtained in the first-quantized formulation. The proof is given in detail for the heterotic string field theory
Externí odkaz:
https://doaj.org/article/f8d0879ecd784becbeb17406d2196a27
Autor:
Hirohito Kan, Yuto Uchida, Yoshino Ueki, Nobuyuki Arai, Satoshi Tsubokura, Hiroshi Kunitomo, Harumasa Kasai, Kiminori Aoyama, Noriyuki Matsukawa, Yuta Shibamoto
Publikováno v:
NeuroImage: Clinical, Vol 33, Iss , Pp 102938- (2022)
Background: R2* relaxometry analysis combined with quantitative susceptibility mapping (QSM), which has high sensitivity to iron deposition, can distinguish microstructural changes of the white matter (WM) and iron deposition, thereby providing a sen
Externí odkaz:
https://doaj.org/article/c78a494927f24220b13ed1e87fb3006a
Publikováno v:
Japanese Journal of Radiological Technology. 77:255-262
Purpose To evaluate image quality for chest radiography at different radiation qualities, using phantoms with scatter fractions similar to those of lungs. Methods Two base phantoms with 10 and 4 cm thicknesses, respectively, made of a soft tissue-equ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1d05cefe80417df09f02284628e7cc73
https://doi.org/10.6009/jjrt.2021_jsrt_77.3.255
https://doi.org/10.6009/jjrt.2021_jsrt_77.3.255
Autor:
Hirohito Kan, Tosiaki Miyati, Yuto Uchida, Nobuyuki Arai, Masahiro Takizawa, Yuta Shibamoto, Harumasa Kasai, Hiroshi Kunitomo
Publikováno v:
Magnetic Resonance Imaging. 73:55-61
To clarify the temperature dependence of susceptibility estimated by quantitative susceptibility mapping (QSM) analysis, we investigated the relationship between temperature and susceptibility using a cylinder phantom with varying temperatures. Six s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ee71a7684a9c29d45d8fc4e931d8923c
https://doi.org/10.1016/j.mri.2020.08.012
https://doi.org/10.1016/j.mri.2020.08.012
Autor:
Hiroshi Kunitomo, Katsuhiro Ichikawa
Publikováno v:
Physica Medica. 73:105-110
Purpose The appropriate object thickness to start using anti-scatter grids (grids) has not sufficiently investigated in previous studies, and thus we rigorously investigated the effectiveness of two generally used grids with grid ratios of 6 and 10 (
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f974d3474264ff59153707097a4e0ae6
https://doi.org/10.1016/j.ejmp.2020.04.014
https://doi.org/10.1016/j.ejmp.2020.04.014
Autor:
Hirohito Kan, Masato Yamada, Yuta Shibamoto, Hiroshi Kunitomo, Takahiro Tsuchiya, Harumasa Kasai
Publikováno v:
Journal of Applied Clinical Medical Physics. 23
To investigate the spatial accuracy of delineating prostatic calcifications by quantitative susceptibility mapping (QSM) in comparison with computed tomography (CT), we conducted phantom and human studies. Five differently-sized spherical hydroxyapat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c6bd53a3d370c77159f4c2a4a247a93b
https://doi.org/10.1002/acm2.13469
https://doi.org/10.1002/acm2.13469
Autor:
Hiroshi Kunitomo
Publikováno v:
Progress of Theoretical and Experimental Physics
We reconstruct a complete type II superstring field theory with L-infinity structure in a symmetric way concerning the left- and right-moving sectors. Based on the new construction, we show again that the tree-level S-matrix agrees with that obtained
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9d305ac4cdfe3ce03ae63bd3f16e4b6a
http://arxiv.org/abs/2106.07917
http://arxiv.org/abs/2106.07917
Autor:
Y. Hirose, Harumasa Kasai, Yuta Shibamoto, Hirohito Kan, Nobuyuki Arai, Hiroshi Kunitomo, Masahiro Takizawa
Publikováno v:
Magnetic Resonance in Medical Sciences
To mitigate the susceptibility inhomogeneity induced by radio-frequency transmit phase error through the whole brain in quantitative susceptibility mapping (QSM) using single-echo gradient echo sequence, we developed a novel single-step QSM reconstru
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ce30017c666e3cfb13fafe89c93dba41
https://doi.org/10.2463/mrms.tn.2018-0066
https://doi.org/10.2463/mrms.tn.2018-0066
Autor:
Yoko Chiba, Yoshiaki Hirofuji, Norimitsu Shinohara, Shinobu Akiyama, Satoko Okada, Toru Negishi, Hiroshi Kunitomo, Takahiro Ito
Publikováno v:
Nihon Hoshasen Gijutsu Gakkai zasshi. 77(5)
Mammography equipment attached to the digital breast tomosynthesis (DBT) system is widespread in Japan. However, there are no guidelines for quality control methods for DBT in Japan. Therefore, it is necessary to rapidly establish a performance evalu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4b732e966fad0316171c3cbbb25ba8cd
https://pubmed.ncbi.nlm.nih.gov/34011791
https://pubmed.ncbi.nlm.nih.gov/34011791
Autor:
Hiroshi Kunitomo, Tatsuya Sugimoto
Publikováno v:
Progress of Theoretical and Experimental Physics. 2020
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c43d2cf59dddfbec90d5aef241c46e6f
https://doi.org/10.1093/ptep/ptz148
https://doi.org/10.1093/ptep/ptz148