X-ray filter

Details X-ray filter X-ray filter

1996-08-28

1997-10-14

Porta, David P.

X-ray or gamma ray systems or devices

Beam control

Filter

378158, 378159, G21K 300

Patent

active

056779437

ABSTRACT:
An x-ray filter which produces a uniform distribution of the image contrast and the image brightness, with an optimally reduced skin dose has a pre-filter for the total x-ray beam and an edge filter, which leaves free a central region of the x-ray beam. The pre-filter is made of a material having an atomic number less than 60, such as copper, and the edge filter is made of a material having an atomic number between 64 and 77.

REFERENCES:
patent: 2216326 (1940-10-01), Smith
patent: 2506342 (1950-05-01), Burke
patent: 3717768 (1973-02-01), Edholm et al.
patent: 4006361 (1977-02-01), Schriber
patent: 5278887 (1994-01-01), Chiu et al.
patent: 5287396 (1994-02-01), Stegehuis
patent: 5365567 (1994-11-01), Ohtsuchi et al.

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