Filter and X-ray imaging system
AssigneeGE Medical Systems Global Technology Company, LLC
InventorPing Yuan
Life of this patent
Estimating the term…
Abstract
A filter capable of adjusting spectrum in multiple stages and that capable of attaining the reduction of size, as well as an X-ray imaging system having such a filter, are provided. The filter, which is for adjusting the spectrum of passing radiation, comprises a support plate having an aperture for passage therethrough of radiation, plural filter plates supported by the filter plate and having mutually different filter characteristics, and moving device for moving the plural filter plates selectively to a position to close the aperture and a position to open the aperture.
Claims20
A filter for use in adjusting a spectrum of passing radiation, said filter comprising:
- a support plate having an aperture for passage therethrough of radiation, the support plate being disc-shaped and having a circumference;
- a plurality of filter plates supported by the support plate within the circumference and having mutually different filter characteristics;
- and
- a moving device configured to selectively move the plurality of filter plates to a first position to close the aperture and a second position to open the aperture, the moving device configured to bias the plurality of filter plates to the second position and to extend the plurality of filter plates radially inwardly toward the first position.
An X-ray imaging system for use in radiographing a subject with X-ray passing through a filter, the X-ray imaging system comprising:
- an X-ray irradiator;
- and
- a filter positioned with respect to the X-ray irradiator, the filter comprising:
- a support plate having an aperture for passage therethrough of radiation, the support plate being disc-shaped and having a circumference;
- a plurality of filter plates supported by the support plate within the circumference and having mutually different filter characteristics;
- and
- a moving device configured to selectively move the plurality of filter plates to a first position to close the aperture and a second position to open the aperture, the moving device configured to bias the plurality of filter plates to the second position and to extend the plurality of filter plates radially inwardly toward the first position.
Dependencies are inferred from the claim text.