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US 9,851,452 B2Granted
Converter unit
AssigneeC-Rad Imaging AB
InventorsKristofer Maad, Gunnar Norberg
Life of this patent
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Abstract
A converter unit configured to convert incident photons into electrons comprises multiple blind holes forming respective ionization chambers. In additional embodiments, the converter unit is arranged in a detector, such as an X-ray detector or absolute radiation dose measurement detector, additionally comprising an electron amplification device and/or a readout device.
Claims46
A detector comprising:
- a metal converter unit adapted to convert incident photons into electrons and comprising multiple blind holes forming respective ionization chambers,
- wherein said multiple blind holes extend from a surface of the converter unit through a portion of a thickness of said converter unit but do not extend through a whole thickness of said converter unit,
- wherein said multiple blind holes have a cross-sectional configuration selected from a group consisting of circular, quadratic, pentagon, hexagon, octagon and elliptic cross-sectional configurations, and
- wherein said multiple blind holes are filled with gas;
- and
- an electron amplification device adapted to produce further electrons from said electrons and comprising multiple through holes,
- wherein at least a portion of said multiple through holes are aligned with said multiple blind holes, and
- wherein said electron amplification device is attached to said converter unit with an electrically isolating connection.
5 more elements
A detector comprising:
- a metal converter unit adapted to convert incident photons into electrons, the metal converter unit comprising a first metal converter plate with multiple through holes and a second metal converter plate closing the multiple through holes at a photon-receiving end of the converter unit to form multiple blind holes serving as respective ionization chambers,
- wherein said multiple blind holes extend from a surface of the converter unit through a portion of a thickness of said converter unit but do not extend through a whole thickness of said converter unit,
- wherein said multiple blind holes have a cross-sectional configuration selected from a group consisting of circular, quadratic, pentagon, hexagon, octagon and elliptic cross-sectional configurations, and
- wherein said multiple blind holes are filled with gas;
- and
- an electron amplification device adapted to produce further electrons from said electrons and comprising multiple through holes,
- wherein at least a portion of said multiple through holes of the electron amplification device are aligned with said multiple blind holes, and
- wherein said electron amplification device is attached to said converter unit with an electrically isolating connection.
5 more elements
Dependencies are inferred from the claim text.