Multi-element X-ray equalizing filter

Details Multi-element X-ray equalizing filter Multi-element X-ray equalizing filter

1979-05-14

1981-08-25

Church, Craig E.

Radiant energy

Radiation controlling means

Shields

250505, G21K 300

Patent

active

042861675

ABSTRACT:
A filter for megavolt X rays has an absorbing member shaped to provide greater thickness for rays in the direction of higher intensity, e.g., the axis of the electron beam. A second absorbing member of a material of different atomic number is shaped to provide greater thickness for rays in the direction of higher photon energy, e.g., said axis. By selecting the combined shapes, both the intensity and the effective photon energy can be equalized over the field of radiation. Thin removable shims may be added for further adjustment. A neutron filter may also be added.

REFERENCES:
patent: 2405444 (1946-08-01), Moreau
patent: 3678233 (1972-07-01), Faw
patent: 3752990 (1973-08-01), Fisher
patent: 4006361 (1977-02-01), Schriber
patent: 4121109 (1978-10-01), Taumann

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