X-ray or gamma ray systems or devices – Electronic circuit – With display or signaling
Patent
1996-09-17
1997-09-09
Wong, Don
X-ray or gamma ray systems or devices
Electronic circuit
With display or signaling
378154, 378149, 25037009, 250580, G21K 100
Patent
active
056663951
ABSTRACT:
It is an object of the invention to provide an X-ray diagnosis apparatus having an X-ray plane detector capable of removing the influence of a scattered X-ray by using a grid and also preventing a Moire image. An X-ray image transmitted through a target object is sensed by a plane detector in units of pixels which are two-dimensionally arranged at a predetermined pitch. A scattered X-ray incident on the plane detector is removed by a scattered ray removing grid having plate-like X-ray shielding members and arranged on an X-ray incident side of the plane detector. The X-ray shielding members are arranged such that an X-ray shielding pattern on the X-ray incident surface of the plane detector has a pitch corresponding to an integer fraction of the arrangement pitch of the pixels. When a steady positional relationship is kept between the pitch of the X-ray detection elements and the period of the fringe pattern of the X-ray which is shielded by the grid, a Moire image can be prevented.
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patent: 4785186 (1988-11-01), Street et al.
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patent: 5436958 (1995-07-01), Taylor
patent: 5557650 (1996-09-01), Guida et al.
patent: 5596198 (1997-01-01), Perez-Mendez
Nabuchi Koichiro
Nagai Seiichiro
Nishiki Masayuki
Saisu Tohru
Tanaka Manabu
Kabushiki Kaisha Toshiba
Wong Don
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