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Your search keyword '"Hasegawa, Ken-ichi"' showing total 181 results
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181 results on '"Hasegawa, Ken-ichi"'

39. Development of a new x-ray radiography system with 16 amorphous silicon linear sensors

Author

Takahashi, Hiroyuki, Harada, Kazuhiro, Nakazawa, Masaharu, Hasegawa, Ken-ichi, Mochiki, Koh-ichi, Hayakawa, Yoshinori, and Inada, Tetsuo

Subjects
Radiography -- Innovations, Silicon -- Usage, Business, Electronics, Electronics and electrical industries
Abstract

A new X-ray radiography system has been developed using multiple amorphous silicon linear sensors combined with a Gd2O2S phosphor sheet. 16 line sensors are aligned parallel with a spacing of 19 mm and are scanned 20 mm to cover an X-ray image. Scanning step is 0.5 mm and accumulation time can be selected from 33 ms to 200 ms per one step. Total active area of 25.6 cm X 30.0 cm with 512 X 608 pixels was realized. The practical problem of this system is caused by the sensitivity variations among sensors, which has been overcome by adopting a multi-level intensity calibration method with a spatially uniform X-ray irradiation. Availability of this system to X-ray radiography has been demonstrated through some medical applications. This system offers a promising compact X-ray imaging system in place of conventional X-ray films.

Published
1993

40. A proton profile monitor using an amorphous silicon photodiode array

Author

Hasegawa, Ken-ichi, Sugiura, Hiroyuki, Mochiki, Koh-ichi, Takahashi, Hiroyuki, Hayakawa, Yoshinori, and Inada, Tetsuo

Subjects
Amorphous semiconductors -- Research, Silicon diodes -- Research, Photodetectors -- Research, Business, Electronics, Electronics and electrical industries
Published
1993

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