X-ray or gamma ray systems or devices – Beam control – Shutter or chopper
Patent
1993-10-12
1995-03-07
Porta, David P.
X-ray or gamma ray systems or devices
Beam control
Shutter or chopper
378147, 378152, G21K 102
Patent
active
053965345
ABSTRACT:
A shutter mechanism for collimating x-rays uses a frame to define an opening with two opposing interior edges. An elongated flexible band extends in sliding engagement about at least a portion of the periphery of the frame opening. A first shutter member made of an x-ray opaque material has a first end attached to the flexible band along the first interior edge of the frame. Similarly, a second shutter member made of an x-ray opaque material has a first end attached to the flexible band along the second interior edge of the frame. A drive means, such as a stepper motor, translates the flexible band relative to the frame to control the positions of the shutter members and the shutter aperture. In the preferred embodiment, the interior edges of the frame also include tracks that slidably engage the opposing edges of the shutter members for support. Two or more of these frame assemblies can be stacked in a rotated orientation about a common axis to provide two-dimensional control of the size of the shutter aperture.
REFERENCES:
patent: 2921202 (1960-01-01), Berger et al.
patent: 3609370 (1971-09-01), Peyser
patent: 3829701 (1974-08-01), Hura
patent: 3936647 (1976-02-01), Fekete
patent: 4167675 (1979-09-01), Stodberg et al.
patent: 4246488 (1981-01-01), Hura
patent: 4380820 (1983-04-01), Cutter
patent: 4389730 (1983-06-01), Cutter
patent: 4489426 (1984-12-01), Grass et al.
patent: 4514859 (1985-04-01), Holzermer
patent: 4641335 (1987-02-01), Hahn
patent: 5012506 (1991-04-01), Span et al.
Porta David P.
Wong Don
LandOfFree
Shutter apparatus for collimating x-rays does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Shutter apparatus for collimating x-rays, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Shutter apparatus for collimating x-rays will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1412425