X-ray or gamma ray systems or devices – Beam control – Antiscatter grid
Patent
1994-07-28
1995-05-23
Church, Craig E.
X-ray or gamma ray systems or devices
Beam control
Antiscatter grid
378155, G21K 100
Patent
active
054188334
ABSTRACT:
An x-ray anti-scatter grid for x-ray imaging, particularly for screening mammography, and method for fabricating same, x-rays incident along a direct path pass through a grid composed of a plurality of parallel or crossed openings, microchannels, grooves, or slots etched in a substrate, such as silicon, having the walls of the microchannels or slots coated with a high opacity material, such as gold, while x-rays incident at angels with respect to the slots of the grid, arising from scatter, are blocked. The thickness of the substrate is dependent on the specific application of the grid, whereby a substrate of the grid for mammography would be thinner than one for chest radiology. Instead of coating the walls of the slots, such could be filed with an appropriate liquid, such as mercury.
REFERENCES:
patent: 2605427 (1952-07-01), Delhumeau
patent: 5231654 (1993-07-01), Kwasnick et al.
UCRL-5000-92-10.11.12, Energy and Technology Review, "Digital Mammography", CM Logan, Oct.-Nov.-Dec. 1992, pp. 27-36.
Carnahan L. E.
Church Craig E.
Sartorio Henry P.
The Regents of the University of California
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