Hironobu Takizawa
Olympus Corporation
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Publication
Featured researches published by Hironobu Takizawa.
Journal of Magnetics | 2007
Atsushi Chiba; M. Sendoh; K. Ishiyama; Ken Ichi Arai; Hironao Kawano; Akio Uchiyama; Hironobu Takizawa
A gastrointestinal (GI) endoscopy is widely carried out in order to find diseases at their early stages. A capsule endoscope is proposed for inspection by swallowing. The capsule moves passively through GI tract with the aid of peristalsis. In previous studies, the effect of GI tracts spiral structure on moving properties of a capsule-type magnetic actuator has been reported. In addition, it was reported that the actuator can pass though an intestine extracted from a pig. In this study, the effect of the spiral structure on the velocity and on the thrust force properties of the actuators were examined using silicone tube as a phantom. If a spiral angle and number of spirals are different, the velocity and the thrust force are varied. Results show that when the spiral angle is 45 degree, the number of spirals is 4, and the spiral height is 1-mm/spl phi/, the velocity and the thrust force had maximum value. A moving test for a capsule-type magnetic actuator was also examined in the pigs large intestine on the slope. It took 300 seconds for the large intestine to pass through to the other end. In addition, the actuator could pass on the slope of 30 degree without a hitch. These results shows that the magnetic actuator has great potential for a navigation system of a capsule endoscope.
Archive | 2007
Takeshi Yokoi; Hironobu Takizawa; Akio Uchiyama; Hitoshi Mizuno
Archive | 2002
Hironobu Takizawa; Hideyuki Adachi; Hitoshi Mizuno; Hisao Yabe; Hiroki Moriyama
Archive | 2007
Takeshi Yokoi; Hironobu Takizawa; Hidetake Segawa; Hitoshi Mizuno; Hideyuki Adachi; Hiroki Moriyama; Hisao Yabe
Archive | 1998
Takeshi Ozawa; Mamoru Kaneko; Akihiro Horii; Hitoshi Ueno; Sakae Takehana; Hiroyuki Sangu; Isami Hirao; Hitoshi Mizuno; Toshimasa Kawai; Hiroki Hibino; Hideyuki Adachi; Hironobu Takizawa; Takefumi Uesugi; Masahiro Ohno; Hidemichi Aoki; Jun Hiroya; Katsuichi Imaizumi; Eiji Yasuda; Yoshinao Oaki; Kenji Yoshino
Archive | 2004
Hironobu Takizawa; Hironao Kawano; Akio Uchiyama; Hidetake Segawa; Masatoshi Homan
Archive | 2007
Akio Uchiyama; Hironobu Takizawa; Takeshi Yokoi; Hitoshi Mizuno
Archive | 2004
Takeshi Yokoi; Masatoshi Homan; Manabu Fujita; Akio Uchiyama; Hironobu Takizawa; Seiichiro Kimoto
Archive | 2004
Hironao Kawano; Hironobu Takizawa; Takeshi Yokoi; Masatoshi Homan; Akio Uchiyama
Archive | 2005
Shinsuke Tanaka; Hironao Kawano; Hironobu Takizawa