Radiation reduction filter for use in medical diagnosis

Details Radiation reduction filter for use in medical diagnosis Radiation reduction filter for use in medical diagnosis

G - Physics

21

K

358/27

G21K 3/00 (2006.01) G21K 1/10 (2006.01)

Patent

CA 1250062

ABSTRACT OF THE DISCLOSURE In accordance with the present invention, there is provided an X-ray filter comprised of a niobium metal foil having a maximum thickness of about 75 microns or niobium metal foil in combination with additional filtering foils. Preferably the niobium and/or combination foils are encased in a thin plastic sheet. The plastic sheet provides for protection of the foil filter during handling as well as some absorption of the secondary radiation emitted from the foil when it is contacted by the X-ray beam. As a result of the construction immediately above, the filter of the present invention filters energy from the X-ray beam which is usually absorbed by the examination object and does not contribute to the radiographic image of the examination object.

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