X-Ray filter for chest X-rays

X-ray or gamma ray systems or devices – Beam control – Collimator

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378152, G21F 504

Patent

active

044728280

ABSTRACT:
Filter for use in medical x-ray apparatus to permit higher intensity x-ray exposure in the heart and mediastinum area while maintaining a normal level of x-ray exposure in other areas of the body, particularly in the lung area. The filter comprises a sheet of radiation absorbing material having an opening therein, said opening corresponding to the spine and central portion of the heart. Accordingly, the upper portion of the filter exhibits a relatively narrow opening which becomes gradually wider toward the lower portion of the filter.

REFERENCES:
patent: 1709626 (1929-04-01), McGunnigle
patent: 3631249 (1971-12-01), Friede et al.
patent: 3717768 (1973-02-01), Edholm et al.
patent: 3950651 (1976-04-01), Flocee
Stanton, Basic Medical Radiation Physics, Meredith Corporation (New York: 1969) pp. 143-146.
Brochure published by Sheldon Enterprises, Inc., P.O. Box 996, Clearwater, Florida 33517.

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