Abstract: The present disclosure relates to a method and a system for computer tomography imaging. The method may comprise obtaining original data; obtaining a preprocessing result by preprocessing the original data; obtaining intensity of the artifact based on the preprocessing result; and updating a damaged channel or the air correction table based on the intensity of the artifact. Updating the air correction table may comprise: obtaining a first air correction table corresponding to a first temperature of detector; obtaining real-time temperature of detector; and obtaining a second air correction table corresponding to the real-time temperature based on the real-time temperature and the first air correction table.

Abstract: An anti-scatter grid, a detector with such an anti-scatter grid and a radiation imaging system including such a detector with an anti-scatter grid are provided. The anti-scatter grid includes at least one grid wall. The parameters of the grid wall may be adjusted to arrive a uniform scatter-to-primary ratio. The parameters of the grid wall comprise thickness, height, shape, or position of the grid wall, or width of interspace between two grid walls. The detector includes the anti-scatter grid, at least one photosensor, and at least one scintillator. The radiation system includes a radiation generator, a radiation detector with the anti-scatter grid, and a processor.

Abstract: Systems and methods for generating control signal in radiation detector systems are provided. One system includes a scheduling architecture having at least one anode channel connected to a detector of the radiation detector system. The anode channel includes a charge sensitive amplifier and a signal shaper, wherein the anode channel is configured to generate at least one control signal to control data acquisition by the detector. The scheduling architecture also includes at least one shaper timer configured having a time constant to define timing for the generation of the control signal without using a clock.

Abstract: A radiation detector is provided employing a focus grid electrode. The focus grid electrode is biased relative to one or more anode electrodes. In this manner, movement of electrons to the anode electrodes may be enhanced, such as due to a higher electrical field strength in a conversion material and/or due to focusing of the resulting electrical field on the anode electrodes.

Abstract: The present disclosure relates to the correction of charge loss in a radiation detector. In one embodiment, correction factors for charge loss may be determined based on depth of interaction and lateral position within a radiation detector of a charge creating event. The correction factors may be applied to subsequently measured signals to correct for the occurrence of charge loss in the measured signals.

Abstract: Systems and methods for generating control signal in radiation detector systems are provided. One system includes a scheduling architecture having at least one anode channel connected to a detector of the radiation detector system. The anode channel includes a charge sensitive amplifier and a signal shaper, wherein the anode channel is configured to generate at least one control signal to control data acquisition by the detector. The scheduling architecture also includes at least one shaper timer configured having a time constant to define timing for the generation of the control signal without using a clock.

Abstract: A data acquisition system includes a charge-sensitive amplifier (CSA) configured to receive a charge from an x-ray detector, the CSA includes a high-gain electronic voltage amplifier, an electrical energy storage device coupled with the amplifier, and an electrical resistor coupled with the amplifier. The data acquisition system includes a baseline sampling circuit configured to receive an output from the CSA and to sample a baseline signal from the CSA, at least one discriminator coupled to an output of the CSA and to an output of the baseline sampling circuit, the at least one discriminator configured to output a voltage if the output of the CSA exceeds a threshold, and a counter coupled to an output of the discriminator and configured to output a digital signal indicative of a photon count received at the x-ray detector and based on the output from the CSA and on the signal from the CSA.

Abstract: A radiation detector includes a semiconductor crystal having a first surface and a second surface opposite to the first surface, a first electrode electrically coupled with the first surface of the semiconductor crystal to allow current to flow between the first electrode and the crystal, and an insulating layer on the first surface and between the semiconductor crystal and the first electrode so as to create a partially transmissive electrical barrier between the first electrode and the crystal. The insulating layer has a thickness ranging from about 50 nanometers to about 500 nanometers.

Abstract: An apparatus and methods for evaluating the operation of pixelated detectors are provided. The method includes obtaining data values for each of a plurality of pixels of a pixelated detector and determining a data consistency metric for each of the plurality of detector pixels. The method further includes identifying, using the determined data consistency metric, any detector pixels that exceed an acceptance criterion as noisy pixels.

Abstract: An event time stamping system comprising a current source, an integrator comprising an input and an output, and configured to output a voltage proportional to the length of time the current source is coupled to the input, and one or more switches configured to couple the current source to the input of the integrator upon receipt of an event signal and configured to de-couple the current source from the input of the integrator upon receipt of a control trigger. The system further comprises a lock-out signal generator configured to generate a lock-out signal, and a controller coupled to the one or more switches, wherein the controller is configured to generate the control trigger based on the lock-out signal to ensure a minimum integration time.

Abstract: An electronic assembly is provided. The assembly comprises a substrate having a plurality of conductive contacts disposed on a surface of the substrate. The substrate comprises a dielectric material. The assembly comprises a detector having a plurality of conductive contacts disposed on a surface of the detector which is adjacent to the surface of the substrate. At least one compliant interconnect is disposed between the substrate and the detector. The conductive contacts of the substrate and the conductive contacts of the detector are in electrical communication with the compliant interconnect via a conductive epoxy. The compliant interconnect comprises a polymer core having an electrically conductive outer surface. In certain embodiments, the assembly comprises an interposer. In certain embodiments, an under-fill is disposed between the surface of the substrate and the surface of the detector.

Abstract: An imaging detection system includes at least one location detection device configured to determine coordinates of a target, at least one detector configured to detect events from a source associated with the target, and a processor coupled in communication with the at least one location detection device and the at least one detector. The processor is configured to receive the coordinates from the at least one location detection device and the events from the at least one detector, translate the events using the coordinates acquired from the at least one location detection device to compensate for a relative motion between the source and the at least one detector, and output a processed data set having the events translated based on the coordinates.

Abstract: The present disclosure relates to the correction of charge loss in a radiation detector. In one embodiment, correction factors for charge loss may be determined based on depth of interaction and lateral position within a radiation detector of a charge creating event. The correction factors may be applied to subsequently measured signals to correct for the occurrence of charge loss in the measured signals.

Abstract: An application-specific integrated circuit (ASIC) comprising a plurality of channels, each channel having circuitry for time and energy discrimination, a plurality of programmable registers, each programmable register configured to output at least one configuration parameter for the circuitry, and a channel-select register configured to identify a channel of the plurality of channels to be configured. The ASIC further includes a configuration-select register configured to identify the programmable register to be used for channel configuration, and a communications interface configured to transmit instructions received from a controller to one of the channel-select register, the configuration-select register, and the plurality of programmable registers.

Abstract: An embodiment of the invention includes a radiation detecting pixel array. The radiation detecting pixel array includes a substrate, a plurality of radiation detecting pixels arranged in a grid pattern on the substrate, a signal routing array embedded within the substrate in operative communication with the plurality of radiation detecting pixels, and at least two symmetrical communication channels arranged on each of two sides of the grid pattern. The signal routing array is formed of communication channels configured to provide operative communication between any of the plurality of radiation detecting pixels and each of the at least two symmetrical communication channels.

Abstract: A CT detector includes a direct conversion material configured to generate electrical charge upon reception of x-rays, a plurality of metallized anodes configured to collect electrical charges generated in the direct conversion material, at least one readout device, and a redistribution layer having a plurality of electrical pathways configured to route the electrical charges from the plurality of metallized anodes to the at least one readout device. A plurality of switches is coupled to the plurality of electrical pathways between the plurality of metallized anodes and the at least one readout device, wherein each of the plurality of switches includes an input line electrically coupled to one of the plurality of metallized anodes, a first output node electrically coupled to the at least one readout device, and a second output node electrically coupled to at least one other switch of the plurality of switches.

Abstract: A radiation detector includes a semiconductor crystal having a first surface and a second surface opposite to the first surface, a first electrode electrically coupled with the first surface of the semiconductor crystal to allow current to flow between the first electrode and the crystal, and an insulating layer on the first surface and between the semiconductor crystal and the first electrode so as to create a partially transmissive electrical barrier between the first electrode and the crystal. The insulating layer has a thickness ranging from about 50 nanometers to about 500 nanometers.

Abstract: A detector module comprises: a direct conversion crystal for converting incident photons into electrical signals, the direct conversion crystal having an anode layer deposited on a first surface and a cathode layer deposited on a second surface; a redistribution layer deposited on the anode layer, the redistribution layer configured to adapt a pad array layout of the direct conversion crystal to a predetermined lead pattern; an integrated circuit in electrical communication with the direct conversion crystal; and a plurality of input/output electrical paths connected to the redistribution layer to provide connectivity between the imaging module and another level of interconnect.

Abstract: A data acquisition system includes a charge-sensitive amplifier (CSA) configured to receive a charge from an x-ray detector, the CSA includes a high-gain electronic voltage amplifier, an electrical energy storage device coupled with the amplifier, and an electrical resistor coupled with the amplifier. The data acquisition system includes a baseline sampling circuit configured to receive an output from the CSA and to sample a baseline signal from the CSA, at least one discriminator coupled to an output of the CSA and to an output of the baseline sampling circuit, the at least one discriminator configured to output a voltage if the output of the CSA exceeds a threshold, and a counter coupled to an output of the discriminator and configured to output a digital signal indicative of a photon count received at the x-ray detector and based on the output from the CSA and on the signal from the CSA.

Abstract: Disclosed herein is a method for detecting high atomic number elements in an article by using radiation having two different energies. The detecting of high atomic number elements can be accomplished by using an algorithm, curve fitting or using a data table. Disclosed herein too is a radiation system that uses the aforementioned method for detecting high atomic number elements.