Zobrazeno 1 - 10
of 130
pro vyhledávání: '"Kohei Okita"'
Publikováno v:
Journal of Biomechanical Science and Engineering, Vol 7, Iss 1, Pp 43-56 (2012)
Both focus control and hot spot elimination applied to the High Intensity Focused Ultrasound (HIFU) treatment are addressed using three-dimensional numerical simulations, which can faithfully capture the pressure field in the HIFU system involving st
Externí odkaz:
https://doaj.org/article/04b2e464f3bd4903bcd4e315fc837bee
Publikováno v:
Journal of Biomechanical Science and Engineering, Vol 7, Iss 1, Pp 84-101 (2012)
A reduced-order model is proposed to provide effective boundary conditions accounting for a vortical fluid velocity confined in an Acoustic Boundary Layer (ABL) around a linear elastic solid object subjected to an ultrasound wave. It is validated by
Externí odkaz:
https://doaj.org/article/1d25c446d89e48eba8cbc3ea604388a0
Publikováno v:
Journal of Fluid Science and Technology, Vol 3, Iss 1, Pp 116-128 (2008)
The propagation of pressure waves caused by a thermal shock in liquid mercury containing micro gas bubbles has been simulated numerically. In the present study, we clarify the influences of the introduced bubble size and void fraction on the absorpti
Externí odkaz:
https://doaj.org/article/b223f94a2c48417c8beaaafbf2255991
Autor:
Masaya Yamaoka, Norikazu Maeda, Seiji Nakamura, Susumu Kashine, Yasuhiko Nakagawa, Aki Hiuge-Shimizu, Kohei Okita, Akihisa Imagawa, Yuji Matsuzawa, Ken-ichi Matsubara, Tohru Funahashi, Iichiro Shimomura
Publikováno v:
PLoS ONE, Vol 7, Iss 10, p e47377 (2012)
Evidence suggests that visceral fat accumulation plays a central role in the development of metabolic syndrome. Excess visceral fat causes local chronic low-grade inflammation and dysregulation of adipocytokines, which contribute in the pathogenesis
Externí odkaz:
https://doaj.org/article/e6e21fe917fc41d197632859279b894c
Autor:
Kohei OKITA
Publikováno v:
The Proceedings of the Fluids engineering conference. 2022:OS06-32
Publikováno v:
IEEE transactions on ultrasonics, ferroelectrics, and frequency control. 69(11)
To prevent undesirable skin burns that occur in high-intensity focused ultrasound (HIFU) treatment, we numerically study focus-control methods, such as phase compensation (PC) and amplitude adaptation (AA). We intentionally assign a high-absorbing la
Publikováno v:
International Journal of Multiphase Flow. 150:103965
Publikováno v:
Ultrasonics. 115
Sector-vortex phased irradiation from annular array transducer was numerically studied with breast model constructed from MRI data of real patient. Phase compensation (PC) based on time reversal pre-computation was applied in order to handle phase de
Autor:
Takashi Azuma, Hidemi Furusawa, Junichi Shidooka, Yoichiro Matsumoto, Kohei Okita, Shu Takagi, Ryuta Narumi
Publikováno v:
Journal of Therapeutic Ultrasound, Vol 6, Iss 1, Pp 1-12 (2018)
Journal of Therapeutic Ultrasound
Journal of Therapeutic Ultrasound
Background The development of imaging technologies and breast cancer screening allowed early detection of breast cancers. High-intensity focused ultrasound (HIFU) is a non-invasive cancer treatment, but the success of HIFU ablation was depending on t
Publikováno v:
Fluid-Structure-Sound Interactions and Control ISBN: 9789811075414
A numerical method for massively parallel computing to solve fluid-structure interaction problems was developed and the method was employed for solving the multiscale problems in biomedical applications. As one of the examples, a platelet adhesion pr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dd890aa4a68b6f10d07dc70c07c29dc8
https://doi.org/10.1007/978-981-10-7542-1_31
https://doi.org/10.1007/978-981-10-7542-1_31