Air-core grid for scattered x-ray rejection

Details Air-core grid for scattered x-ray rejection Air-core grid for scattered x-ray rejection

1994-09-01

1995-10-03

Porta, David P.

X-ray or gamma ray systems or devices

Beam control

Antiscatter grid

378145, 378149, G21K 102

Patent

active

054558492

ABSTRACT:
The invention is directed to a grid used in x-ray imaging applications to block scattered radiation while allowing the desired imaging radiation to pass through, and to process for making the grid. The grid is composed of glass containing lead oxide, and eliminates the spacer material used in prior known grids, and is therefore, an air-core grid. The glass is arranged in a pattern so that a large fraction of the area is open allowing the imaging radiation to pass through. A small pore size is used and the grid has a thickness chosen to provide high scatter rejection. For example, the grid may be produced with a 200 .mu.m pore size, 80% open area, and 4 mm thickness.

REFERENCES:
patent: 4951305 (1990-08-01), Moore et al.
patent: 5263075 (1993-11-01), McGann et al.

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