A measurement area selection circuit has an irradiation field determination unit, an object area determination unit, and a measurement area determination unit. The irradiation field determination unit determines an irradiation field of an imaging surface of an FPD. The object area determination unit determines an object area from a comparison result between a first expected received dose of a directly exposed area and dose detection signals of detection pixels situated in the irradiation field. The measurement area determination unit determines a measurement area, which corresponds to a region of interest, from a comparison result between a second expected received dose of the measurement area and the dose detection signals of the detection pixels situated in the irradiation area and the object area. The dose detection signals of the detection pixels situated in the measurement area are used for AEC.

A planar radiographic imaging device has electromagnetic radiation sensitive elements disposed in a two-dimensional array. A housing encloses the two-dimensional array of radiation sensitive elements and includes a layer of aligned carbon nanotubes on a surface thereof.

A silicon photomultiplier array including a plurality of microcells arranged in subgroupings, each microcell of a respective subgrouping providing a pulse output in response to an incident radiation. Each microcell output interconnected by respective traces of equal length to either a summing node or an integrated buffer amplifier. Each respective summing node configured to sum the pulse outputs of a first subgroup of the microcell subgroupings, and each respective integrated buffer amplifier configured to sum the pulse outputs of each microcell of a second subgrouping, the respective integrated buffer amplifier located on the silicon photomultiplier array within the second subgroup of microcells. The plurality of microcells arranged in one of columns and rows, and a first group of the arranged plurality of microcells being a mirror image of a second group of the arranged plurality of microcells about a midpoint between one of the columns and rows.

A detector is described having readout electronics integrated in the photodetector layer. The detector may be configured to acquire both energy-integrated and photon-counting data. In one implementation, the detector is also configured with control logic to select between the jointly generated photon-counting and energy-integrated data.

A radiation imaging apparatus includes an imaging unit having sensors configured to detect radiation, and configured to output an analog signal from each sensor, an AD converter configured to, in each AD conversion period corresponding to a frame, convert the analog signals from the imaging unit into digital signals and output the digital signals as a serial data string of bits, a serial-parallel conversion unit configured to convert, into parallel data, the serial data string of the bits from the AD converter, and an alignment unit configured to perform alignment for the serial-parallel conversion unit to identify the serial data string. The alignment unit performs the alignment in at least a period between one AD conversion period and another analog-to-digital conversion period, in addition to performing the alignment before a first AD conversion period.

A detector panel is described having readout circuitry integrated with the photodetectors, such as in the light imager panel. The detector is useful in high spatial resolution and low-dose or low-signal imaging contexts and may be used in adaptive 2D binning configurations. Adaptive binning of detector elements may be accomplished using control logic and X-ray intensity detector circuitry capable of assessing an incident X-ray intensity and controlling binning of an associated group of detector elements.

A portable radiation detection device with a detector unit comprising a scintillator with an array of avalanche photo-diodes allows to reliably detect incident ionizing radiation or radiation contamination in the presence of intense magnetic fields of 0.1 Tesla and above.

According to on embodiment, a photon counting CT apparatus includes a hybrid detector and processing circuitry. The hybrid detector includes CT detectors and PCCT detectors. The CT detectors output integral signals concerning the detected X-rays. The PCCT detectors output a count signal for each of a plurality of energy bands concerning the detected X-rays. The processing circuitry estimate a count signal concerning an estimation target CT detector of the CT detectors based on an integral signal output from the estimation target CT detector and a count signal output from the PCCT detector. And the processing circuitry reconstruct an image based on the estimated count signal and the count signal.

The present invention relates to x-ray detector systems and methods for imaging of objects. The detector system can include a scintillator mounted to a solid state pixelated detector having a buried channel structure. An electronic shutter can be used to control detector exposure during an imaging procedure.

A radiation detection device integrates the number of optical photons in a light pulse. The radiation detection device includes an optical detector pixel array which has a plurality of pixel cells that are triggered by optical photons, a plurality of pixel cell trigger state sensing circuits, and a summing unit. Each pixel cell trigger state sensing circuit generates a digital signal having either a first predetermined amplitude indicative of a triggered pixel cell, or a second predetermined amplitude indicative of a non-triggered pixel cell. The summing unit generates an analog signal whose amplitude corresponds to the number of triggered pixel cells and thereby performs the integration. The analog signal may further cause a timing unit to generate a timestamp when a predetermined accumulated optical photon count condition is met.