X-radiation gating and target device

Details X-radiation gating and target device X-radiation gating and target device

1988-06-10

1990-06-26

Church, Craig E.

X-ray or gamma ray systems or devices

Beam control

Antiscatter grid

378181, 378154, 378150, G21K 100

Patent

active

049378490

ABSTRACT:
A gating and target device for an x-ray examination apparatus has a secondary radiation diaphragm and an x-ray film cassette, the secondary radiation diaphragm having two diaphragm plates disposed in parallel planes, and moveable relative to each other so that the diaphragm plates can be adjusted to at least partially overlap. Each of the diaphragm plates has a diaphragm opening therein, with the remainder of the plate being impermeable to x-radiation, so that by adjusting the relative positions of the plates, an opening of selected size may be formed by either one of said diaphragm plates at least partially covering the opening of the other diaphragm plate. To minimize the thickness of the device, and thus to minimize the distance between the target x-ray film and an examination subject, one of the diaphragm plates has a scattered ray grid structurally integrated within the opening of that plate.

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patent: 4577341 (1986-03-01), Schwieker et al.
patent: 4706269 (1987-11-01), Reina et al.

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