摘要:
A photodiode detector array includes a layer of intrinsic semiconductor material having a first doped layer on a first surface of a first conductivity type and an array of photodiodes having respective doped regions on a second surface of an opposite conductivity type. Electrical contacts on the second surface respectively contact the doped regions and convey electrical signal therefrom. Conductors extend from the electrical contacts to convey the electrical signals to output terminals of the array. A scintillator is optically coupled to the layer of intrinsic semiconductor material at the first surface thereof and can be pixelated, with individual scintillator elements aligned with and corresponding to the doped regions of the photodiode. The photodiode detector array can be mounted to a rigid printed wiring board or to a flat bottom wall surface of the scintillator.
摘要:
A phosphor admixture includes a phosphor powder and a number of radiation capture electron emitters. The emitters are dispersed within the phosphor powder. A phosphor screen includes phosphor particles, radiation capture electron emitters and a binder. The emitters and phosphor particles are dispersed within the binder. An imaging assembly includes a phosphor screen configured to receive incident radiation and to emit corresponding optical signals. An electronic device is coupled to the phosphor screen. The electronic device is configured to receive the optical signals from the phosphor screen and to generate an imaging signal.
摘要:
A focal spot sensing device includes: a housing that resists x-ray beams; an opening disposed in a wall of the housing that allows an x-ray beam to enter the housing; and a sensor device disposed in the housing that interprets a position of the x-ray beam for calculating a position of a focal spot. An imaging system includes: an x-ray source that produces an x-ray beam and has a focal spot; a detector array that receives the x-ray beam and includes a focal spot sensing device, the focal spot sensing device includes: a housing that resists x-ray beams; an opening disposed in a wall of the housing that allows the x-ray beam to enter the housing; and a sensor device disposed in the housing that interprets a position of the x-ray beam for calculating a position of the focal spot. A method for sensing a focal spot, the method includes: receiving an x-ray beam into an opening of a focal spot sensing device; interpreting a position of the x-ray beam; and calculating or measuring a position of a focal spot.
摘要:
An x-ray detector assembly includes a first flat panel digital projection detector and a second flat panel digital projection detector. The x-ray detector assembly further includes a first detector mounting structure configured to align the first flat panel digital projection detector in a first position to block the second flat panel digital projection detector from receiving x-rays emitting from an x-ray source toward the second flat panel digital projection detector in an x-ray penetration direction.
摘要:
Methods and apparatus for an imaging system are provided. The imaging system includes a gantry having a stationary member coupled to a rotating member. The rotating member has an opened area proximate an axis about which the rotating member rotates. An x-ray source provided on the rotating member. An x-ray detector may be disposed on the rotating member and configured to receive x-rays from the x-ray source. A rotary transformer having circumferentially disposed primary and secondary windings may form part of a contactless power transfer system that rotates the rotatable portion of the gantry at very high speeds, the primary winding being disposed on the stationary member and the secondary winding being disposed on the rotating member.
摘要:
A composition including at least one of a glass composition and a glass ceramic composition, the composition includes a plurality of scintillator crystals.
摘要:
A scintillator array for use in a CT imaging system and a method for making the scintillator array are provided. The scintillator array includes a plurality of projecting elements disposed proximate one another. The scintillator array further includes a glass compound containing a plurality of reflective particles being disposed on the plurality of projecting elements, wherein the projecting elements emit light in response to receiving x-rays.
摘要:
A photodiode detector assembly for use with an ionizing radiation detector, the assembly includes a first layer having a first side and a second side and an array of backlit photodiodes disposed at the second side, and a second layer disposed proximate to and opposing the second side of the first layer. The second layer includes thru vias. Light rays entering the first layer at the first side and impinging the backlit photodiodes at the second side result in electrical signals at the thru vias of the second layer, thereby providing electrical output signals from the backlit photodiodes at a distance from the backlit photodiodes.
摘要:
A radiation detector includes a scintillator layer configured to absorb radiation emitted from a radiation source and to emit optical photons in response to the absorbed radiation. The radiation detector also includes a photodetector layer configured to absorb the optical photons emitted by the scintillator layer. The radiation detector further includes a reflector configured to reflect the optical photons emitted by the scintillator layer towards the photodetector layer and to absorb select wavelengths of optical photons associated with an afterglow emitted by the scintillator layer.