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Dive into the research topics where Masahiro Sai is active.

Publication


Featured researches published by Masahiro Sai.


Clinical Imaging | 2009

Reduced compression mammography to reduce breast pain

Koichi Chida; Yuka Komatsu; Masahiro Sai; Asuka Nakagami; Takayuki Yamada; Takuya Yamashita; Issei Mori; Tadashi Ishibashi; Shin Maruoka; Masayuki Zuguchi

This study evaluated whether reduced compression mammography to relieve breast tenderness is feasible. Women can better tolerate a compression force of approximately 90 N in mammography. The breast thickness increased approximately 3 mm when the compression force was reduced to 90 N, and although the radiation dose increased approximately 20%, the image quality was identical to that with standard compression. Many patients experience breast pain with a compression force of 120 N. Reduced compression force mammography is acceptable in women whose breasts are particularly sensitive.


Tohoku Journal of Experimental Medicine | 2000

Relationship between the Pixel Value in Digital Subtraction Angiography and Iodine Concentration: Study in High Iodine Concentration with Original Phantom

Koichi Chida; Masahiro Sai; Haruo Saito; Kei Takase; Masayuki Zuguchi; Masatoshi Sasaki; Tokutaro Sato


Clinical Imaging | 2005

Optimization of tube potential–filter combinations for film-screen mammography:A contrast detail phantom study

Koichi Chida; Masayuki Zuguchi; Masahiro Sai; Haruo Saito; Takayuki Yamada; Tadashi Ishibashi; Daisuke Ito; Nobumitsu Kimoto; Masahiro Kohzuki; Shoki Takahashi


日本乳癌検診学会誌 = Journal of Japan Association of Breast Cancer Screening | 2008

Questionnaires for Screening Digital Mammography in Japan : Part 2

Takayuki Yamada; Tadashi Ishibashi; Masahiro Sai; Koji Ohnuki; Takayoshi Uematsu; Masao Matsumoto; Nachiko Uchiyama; Takeshi Hara; Norimitsu Shinohara


Breast Cancer | 2010

Digital mammographic screening in Japan

Tadashi Ishibashi; Yusuke Kawasumi; Takayuki Yamada; Masahiro Sai; Takayoshi Uematsu; Nachiko Uchiyama


RSNA 2003 | 2005

Optimization of tube potential-filter combinations for film-screen mammography a contrast detail phantom study

Koichi Chida; Masayuki Zuguchi; Masahiro Sai; Haruo Saito; Takayuki Yamada; Tadashi Ishibashi; Daisuke Ito; Nobumitsu Kimoto; Masahiro Kohzuki; Shoki Takahashi


日本放射線技術学会総会学術大会一般研究発表後抄録 | 1998

Operator Dose Estimation of Cardiac Catheterization in Transbrachial Approach

Koichi Chida; Masahiro Sai; Hiroki Ishiya; Kyoko Onuma; Hiroshi Sakamoto; Kunihiko Sato; Maki Fukuda; Shinya Mitsui; Masatoshi Sasaki


Japanese Journal of Radiological Technology | 1998

Performance Evaluation and Quality Control of Polygraphs for Cardiac Catheterization

Koichi Chida; Tatsuo Ngasaka; Masahiro Sai; Hiroki Ishiya; Kunihiko Sato; Masatoshi Sasaki


Japanese Journal of Radiological Technology | 1997

Accuracy of a Monitoring Unit for X-ray Tube Voltage and Current in X-ray High-Voltage Generator

Koichi Chida; Tatsuo Nagasaka; Hiroki Ishiya; Hiroyuki Sato; Masahiro Sai; Masatoshi Sasaki


Japanese Journal of Radiological Technology | 1997

295 Change of fluorography by deterioration of brightness of CRT and illuminance of environment

Kunihiko Sato; K. Chida; Hiroki Ishiya; Satoru Watanabe; Tatsuo Nagasaka; Masahiro Sai; Masatoshi Sasaki; Tomohiro Shimizu

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