X-ray equalization filter

Details X-ray equalization filter X-ray equalization filter

1998-04-21

2000-08-22

Porta, David P.

X-ray or gamma ray systems or devices

Beam control

Filter

378159, 378 18, G21K 300

Patent

active

061084034

ABSTRACT:
An object (22) is positioned on a patient support (25) between an x-ray source (10) and an x-ray detector assembly (15). The x-ray source (10) is selectively activated to transmit an x-ray beam (20) through an imaging region (32) to the x-ray detector assembly (15). Positioning of the object (22) on the patient support (25) is such that a gap 33 exists in the imaging region (32) through which x-rays may pass unattenuated. An x-ray equalization filter (30) is introduced into the gap 33 and substantially conforms to its shape. The equalization filter (30) comprises a fluid medium disposed in a flexible receptacle. The fluid medium contains x-ray attenuating material suspended in a gel base. Placement of the equalization filter (30) in the gap reduces the number of unattenuated x-rays reaching the x-ray detector assembly (15) thereby enhancing image quality.

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Material Safety Data Sheet for Oatey #95 Tinning Flux (Lead Free) having a date of issue of Sep. 19, 1997 and published by Oatey Corporation of Cleveland, OH.
Lam, Chan; "Effects of x-ray beam equalization on mammographic imaging"; Med. Phys. 17(2), Mar./Apr. 1990, pp. 242-249.
Product Data Sheets from Nuclear Associates of Carle Place, N.Y., pp. 120-125, 129, 131, 172.

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