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US 2001/0032934 A1Published application
Flat panel x-ray imager with gain layer
AssigneeHologic, Inc.
InventorsDenny L.Y. Lee, Lawrence K.F. Cheung, Andrew P. Smith
Life of this patent
Estimating the term…
Abstract
A flat panel x-ray imager includes a gain layer (charge multiplication layer) that facilitates imaging at low x-ray exposure levels. The gain layer can be a gas chamber or a solid state material operating in an avalanche mode.
Claims15
A flat panel x-ray imager comprising:
- a charge generator layer locally generating electrical charges in response to x-ray exposure;
- a gain layer receiving electrical charges generated in the charge generator layer and locally multiplying received charges;
- and
- a charge collector locally collecting electrical charges multiplied by the gain layer to produce electrical signals related to local x-ray exposure of the charge generator layer.
1 more element
A method of imaging x-rays comprising:
- receiving x-rays at a charge generator layer locally generating electrical charges in response to x-ray exposure;
- locally receiving at a gain layer electrical charges generated by the charge generating layer and locally multiplying charges received at the gain layer to thereby produce locally multiplied electrical charges;
- and
- locally collecting electrical charges multiplied by the gain layer to produce electrical signals related to local x-ray exposure at the charge generator layer.
1 more element
A method of imaging low exposure level x-rays comprising:
- receiving x-rays at a charge generator layer locally generating electrical charges in response to x-ray exposure;
- locally receiving at a gain layer electrical charges generated by the charge generating layer and locally multiplying charges received at the gain layer to thereby produce locally multiplied electrical charges suitable for low x-ray exposure level imaging;
- and
- locally collecting electrical charges multiplied by the gain layer to produce electrical signals related to local x-ray exposure at the charge generator layer.
1 more element
A method of imaging low exposure level x-rays suitable for real-time fluoroscopy comprising:
- receiving x-rays at a charge generator layer locally generating electrical charges in response to x-ray exposure;
- locally receiving at a gain layer electrical charges generated by the charge generating layer and locally multiplying charges received at the gain layer to thereby produce locally multiplied electrical charges suitable for low x-ray exposure level imaging in real-time fluoroscopy;
- and
- locally collecting electrical charges multiplied by the gain layer to produce electrical signals related to local x-ray exposure at the charge generator layer.
1 more element
Dependencies are inferred from the claim text.