Yasushi Hara
Fujitsu
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Publication
Featured researches published by Yasushi Hara.
ieee symposium on ultrasonics | 1990
Kenji Kawabe; Yasushi Hara; Kazuhiro Watanabe; Takaki Shimura
In attempting to improve the quality of images produced by ultrasonic diagnostic equipment, the authors tried to narrow the width of the ultrasound beam in the scanning direction and the short axis perpendicular to the scanning direction, and to shorten the pulse duration. The beamwidth, especially in the short axis, is markedly broad. To narrow the width, the transmitting acoustic sound pressure was apodized by polarizing the piezoelectric ceramic element of an array-type transducer in a stepped manner. A transducer using this apodization had its beamwidth decreased from 50% to 80% compared to the conventional transducer.<<ETX>>
Archive | 2005
Yasushi Hara; Chikara Nishio; Makoto Abe; Masashi Hirabayashi; Hiroshi Yamada; Toshikazu Takahashi; Akira Tanaka
Archive | 2003
Yasushi Hara; Hiroshi Yamada; Hirokazu Aritake; Akira Tanaka; Makoto Abe
Archive | 2006
Yasushi Hara; Yoshiyasu Nakashima; Satoshi Kazama; Koichi Yokota; Akira Shiba
Archive | 1991
Kazuhiro Watanabe; Kenichi Hayakawa; Hiroshi Ishikawa; Yasushi Hara; Kiyoto Matsui; Kenji Kawabe; Takaki Shimura
Archive | 2001
Hiroshi Yamada; Shinichi Yoshimoto; Yasushi Hara; Akira Shiba
Archive | 2002
Yasushi Hara; Keiichi Murakami; Hiroshi Yamada; Hideyuki Motoyama; Hirokazu Aritake; Toshiaki Yoshihara; Shinji Tadaki
Archive | 1990
Kazuhiro Watanabe; Yasushi Hara; Atsuo Iida; Takaki Shimura; Kiyoto Matsui; Hiroshi Ishikawa; Kenji Kawabe
Archive | 2005
Yasushi Hara; Toshiya Miyazaki; Youichi Kondou; Satoshi Kikuchi; Kazuyuki Takaki
Archive | 2006
Yasushi Hara; Akira Shiba; Youichi Kondou
