Diagnostic and therapeutic detector system for imaging with low and high energy X-ray and electrons
OwnerMats Danielsson, Anders Brahmeinventors
Life of this patent
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Abstract
A detector unit for detecting photons in the energy range 1 keV to 100 MeV, includes at least two converter layers adapted to interact with incident X-ray photons and to cause electrons to be emitted therefrom, at least one amplifier adapted to interact with the electrons emitted from the converters and adapted to produce a multiplicity of secondary electrons and photons representing a signal proportional to the incident fluence of X-ray photons, a connector connecting the detector to an electric field generator providing an electric drift field for secondary electrons in the detector, and a sensor device arranged to receive the signal and provide an input to electronic signal processor.
Claims23
A detector unit for detecting photons in the energy range 1 keV to 100 MeV, comprising:
- at least two non-gas converter layers stacked on one another and for interacting with incident X-ray photons and causing electrons to be emitted therefrom;
- at least one amplifier coupled to each converter and adapted to interact with the electrons emitted from the converter to produce a multiplicity of secondary electrons and photons representing a signal proportional to the incident fluence of X-ray photons;
- connectors connecting the detector to an electric field generating means for providing an electric drift field for secondary electrons in the detector;
- and
- a sensor device arranged to receive said signal and provide an input to electronic signal processing means.
A detector unit for detecting photons in the energy range 1 keV to 100 MeV, comprising:
- at least two converter layers stacked on one another and adapted to interact with incident X-ray photons and to cause electrons to be emitted therefrom;
- at least one amplifier coupled to each converter and adapted to interact with the electrons emitted from the converter to produce a multiplicity of secondary electrons and photons representing a signal proportional to the incident fluence of X-ray photons;
- connectors connecting the detector to an electric field generating means for providing an electric drift field for secondary electrons in the detector;
- and
- a sensor device arranged to receive said signal and provide an input to electronic signal processing means,
- wherein said amplifier comprises a wire metal mesh, and wherein there is provided connecting means for connecting a voltage source to apply an electric potential between the converter and said wire mesh.
A detector unit for detecting photons in the energy range 1 keV to 100 MeV, comprising
- a housing having walls, a top cover and a bottom and enclosing a gas;
- a plurality of integrated converter and amplifier structures arranged in a stack in said housing;
- a charge collection device arranged at the bottom of the housing;
- connection means comprising a variable resistor chain coupled in series across the entire detector, connectable to an external voltage source;
- electronic read out devices coupled to said charge collection device for providing an input to a control unit;
- wherein
- said integrated converter and amplifier structures each comprise a central metal layer on both sides of which there is provided an insulating layer, and wherein the respective insulating layers each are provide with a metal film forming a composite dipole layered structure, wherein the central metal layer is thicker than each insulating layer, and wherein each insulating layer is thicker than each metal film, and wherein said composite dipole layered structure is perforated with holes;
- said holes having an entrance opening for electrons and an exit opening wherein said exit opening is wider than said entrance opening.
Dependencies are inferred from the claim text.