Techniques are provided for x-ray onset detection for an intraoral dental sensor. A methodology implementing the techniques according to an embodiment includes calculating a plurality of superpixel values for each of a plurality of rows of detector pixels of a sensor. Each of the superpixel values is based on a sum of pixel values of a set of pixels associated with the superpixel value, the set of pixels selected from the detection row of a current frame of the sensor. The method also includes calculating a difference between each of the superpixel values and a corresponding stored superpixel value generated from a previous sensor frame and determining if the differences exceed a superpixel threshold value. The method further includes incrementing a hit counter in response to the determination and generating a detection signal if the hit counter exceeds a hit count threshold, otherwise proceeding to process the next detection row.

A radiographic imaging device includes a radiation detection element including plural same sized hexagonal shaped pixels that detect radiation and are arrayed in a honeycomb pattern, and a pixel density conversion section that performs interpolation processing such that first image data obtained from the radiation detection element is converted into second image data representing an image in which plural pixels are arrayed in a square grid pattern, wherein when d1max denotes the length of the longest diagonal of the hexagonal shaped pixels, S1 denotes the surface area of the hexagonal shaped pixels, and d2max denotes the length of the diagonals of the square grid of the second image data, d1max is equal to or greater than d2max, and d2max is equal to or greater than the value of the square root of S1.

A radiation imaging apparatus comprising a pixel array in which a plurality of pixels are arrayed and a processor configured to generate a radiation image based on radio-photons which have entered the pixel array, wherein the processor performs a first process of obtaining a value of a signal from each of the plurality of pixels as a pixel value, a second process of selecting at least one of the plurality of pixels as a reference pixel, and a third process of specifying a detection area of a radio-photon in the pixel array by sequentially referring to pixel values of pixels around the reference pixel as a starting point.

Disclosed herein is an image sensor and a method of making the image sensor. The image sensor may comprise one or more packages of semiconductor radiation detectors. Each of the one or more packages may comprise a radiation detector that comprises a radiation absorption layer on a first strip of semiconductor wafer and an electronics layer on a second strip of semiconductor wafer. The radiation absorption layer may be continuous along the first strip of semiconductor wafer with no coverage gap. The first strip and the second strip may be longitudinally aligned and bonded together. The radiation detector may be mounted on a printed circuit board (PCB) and electrically connected to the PCB close to an edge of the radiation detector.

A radiation imaging system for generating a moving image includes pixels each including a signal generation unit configured to convert radiation into charges; a reading circuit configured to read, from each pixel, an accumulation signal output from the signal generation unit in accordance with accumulated charges and a reset signal output from the signal generation unit in a reset state; a storage unit; and a signal processing unit stores, in the storage unit, a correction image generated based on the reset signal and the accumulation signal read from each pixel before initial irradiation, and generates a frame image in each frame period based on a radiation image generated based on the accumulation signal read from each pixel, a reset image generated based on the reset signal read from each pixel, and the correction image stored in the storage unit.

An apparatus includes: a first pixel for acquiring an image, the first pixel including a first conversion element and a first thin-film transistor and connected to a first signal line; and a second pixel for correcting an output of the first pixel, the second pixel including an element and a second thin-film transistor and connected to a second signal line, in which a ratio between a plurality of capacitances related to the first signal line and a ratio between a plurality of capacitances related to the second signal line are approximately equivalent.

An apparatus includes: a first pixel for acquiring an image, the first pixel including a first conversion element and a first thin-film transistor and connected to a first signal line; and a second pixel for correcting an output of the first pixel, the second pixel including an element and a second thin-film transistor and connected to a second signal line, in which a ratio between a plurality of capacitances related to the first signal line and a ratio between a plurality of capacitances related to the second signal line are approximately equivalent.

A method of operating a DR detector including sequentially capturing image frames in the detector that include at least one dark image. The dark image is stored and a statistical measure for a subset of pixels in a captured image frame is compared with the same statistical measure of a subset of pixels in the stored dark image to detect an x-ray beam impacting the detector. An x-ray beam-on condition is indicated if a sufficient difference in intensity between the pixel subsets is detected. At least one more image frame is captured in the detector after detecting the x-ray beam. The current captured image and the at least one more image frame are added and the dark image is subtracted to form the exposed radiographic image.

A radiation imaging apparatus, comprising a sensor array in which a plurality of sensors capable of detecting radiation are arrayed, and a readout unit configured to read out image data from the sensor array, wherein the sensor array has, as an operation mode, a binning mode in which signals of not less than two sensors are collectively output, and the readout unit includes a correcting unit configured to correct image data read out from the sensor array irradiated with radiation, based on image data read out in the binning mode from the sensor array not irradiated with radiation.

A solid-state imaging device includes a photodetecting unit including MN pixels arrayed two-dimensionally in M rows and N columns, an output unit outputting a digital value generated on the basis of the amount of charge input from the pixels, and a control unit. The control unit divides the MN pixels in the photodetecting unit into unit regions each including pixels in Q rows and R columns, divides the unit regions arrayed two-dimensionally in (M/Q) rows and (N/R) columns into binning regions each including unit regions in K rows and one column, and repeatedly outputs the digital value according to the sum of amounts of the charges output from KQR pixels included in each binning region from the output unit K times in a column order for each row sequentially for the binning regions arrayed two-dimensionally in (M/KQ) rows and (N/R) columns.