Abstract: A novel X-ray detector for in-line computed tomography includes two-dimensional pixel arrays in a single piece of silicon, which allows a signal from every pixel in the silicon to be read out during an X-ray beam exposure period. The pixel arrays face the X-ray source to ensure that X-ray photons follow a straight line that intersects the X-ray source and the 2D pixel arrays. A layer of an X-ray scintillator may be applied in front of the 2D array. The detector may be implemented in a tiled detector array arrangement, or on a single PCB board. When multiple on-board detectors are arranged and mounted on a curved gantry, the novel X-ray detector system can be utilized in multi-slice in-line CT applications. The X-ray detector readout electronics is compatible with that of a conventional detector module, where signals from individual detectors can be read out in parallel.

Abstract: A dual/multi-energy x-ray image sensor with stacked two-dimensional pixel arrays. Each pixel in one pixel array has a corresponding “overlaid” pixel in the other pixel array. The pixel arrays are stacked parallel and aligned so that they are nominally normal to the x-ray path, and so that a straight path taken by an x-ray photon from the x-ray source to a pixel in one pixel array will also nominally intersect the corresponding pixel in the other pixel array(s). The energy image sensor provides an x-ray scanning detector system, which has increased signal levels and signal-to-noise ratios over dual- or multi-energy detectors using linear diode arrays, specifically when the pixel arrays are TDI pixel arrays that offer higher sensitivities in high-speed line-scan applications. Signal processing circuitry is placed on a periphery of the pixel arrays and shielded. Dual-to-multiple energy applications can be accomplished by increasing the number of stacked pixel arrays.

Abstract: A dual/multi-energy x-ray image sensor with stacked two-dimensional pixel arrays. Each pixel in one pixel array has a corresponding “overlaid” pixel in the other pixel array. The pixel arrays are stacked parallel and aligned so that they are nominally normal to the x-ray path, and so that a straight path taken by an x-ray photon from the x-ray source to a pixel in one pixel array will also nominally intersect the corresponding pixel in the other pixel array(s). The energy image sensor provides an x-ray scanning detector system, which has increased signal levels and signal-to-noise ratios over dual- or multi-energy detectors using linear diode arrays, specifically when the pixel arrays are TDI pixel arrays that offer higher sensitivities in high-speed line-scan applications. Signal processing circuitry is placed on a periphery of the pixel arrays and shielded. Dual-to-multiple energy applications can be accomplished by increasing the number of stacked pixel arrays.