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US 2010/0072376 A1Published application
Spectral filter for use with lutetium-based scintillators
AssigneeKoninklijke Philips Electronics N.V.
InventorCees RONDA
Life of this patent
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Abstract
A spectral filter used in conjunction with a lutetium-based scintillation material in a radiation detector is in imaging systems. The spectral filter operates to block at least a portion, but preferably substantially all, of an undesired infrared afterglow which results from ytterbium impurities in the lutetium-based scintillation material.
Claims20
A radiation detector comprising:
- a scintillator comprising a lutetium-based scintillation material;
- a photodetector optically coupled to the scintillator;
- and
- a spectral filter disposed in an optical path between the scintillator and the photodetector and adapted to block at least a portion of a light emitted from the scintillator.
1 more element
A method for detecting radiation comprising the steps of:
- receiving radiation with a lutetium-based scintillation material, wherein the lutetium-based scintillation material emits secondary photons in response to receiving the radiation;
- filtering the secondary photons emitted by the lutetium-based scintillation material to block at least a portion of a light emitted from the lutetium-based scintillation material and transmit a filtered light;
- and
- detecting the filtered light with a photodetector.
1 more element
An imaging device comprising:
- at least one radiation source;
- at least one radiation detector comprising
- a lutetium-based scintillation material,
- a photodetector optically coupled to the lutetium-based scintillation material,
- a spectral filter disposed in an optical path between the lutetium-based scintillation material and the photodetector and adapted to block at least a portion of an infrared light emitted from the lutetium-based scintillation material, and
- a circuit board to receive an electrical signal from the photodetector and transmit the electrical signal;
- and
- an image processor to process the electrical signal from the circuit board to form an image of a subject according to one or more algorithms.
5 more elements
Dependencies are inferred from the claim text.