Detector module designs for radiographic imaging include first and second layers of scintillator rods or pixel arrays oriented in first and second directions. The first and second directions are transversely oriented to define a light sharing region between the first and second layers. Encoding features may be disposed in, on or between the first and second layers, and configured to modulate propagation of optical signals therealong or therebetween.

Detector module designs for radiographic imaging include first and second layers of scintillator rods or pixel arrays oriented in first and second directions. The first and second directions are transversely oriented to define a light sharing region between the first and second layers. Encoding features may be disposed in, on or between the first and second layers, and configured to modulate propagation of optical signals therealong or therebetween.

A photon measurement front-end circuit (200, 400, 800, 900) comprises an integral module (210, 410, 910), a comparator (220, 420, 810, 920), a transmission controller (230, 430, 820, 930), a negative feedback module (240, 440, 830, 940) and a photon measurement module (250, 450, 840, 950). The integral module (210, 410, 910) is used for receiving an initial signal from a photoelectric detector and a feedback signal from the negative feedback module (240, 440, 830, 940), integrating the difference between the initial signal and the feedback signal, and outputting an integral signal. The comparator (220, 420, 810, 920) is used for comparing the integral signal with a reference level and generating a comparison result. The transmission controller (230, 430, 820, 930) is used for controlling the transmission of the comparison result by using a clock signal, in order to output a digital signal. The negative feedback module (240, 440, 830, 940) is used for converting the digital signal into the feedback signal and feeding the feedback signal back to the integral module. The photon measurement module (250, 450, 840, 950) comprises an energy measurement module (251, 451), and the energy measurement module (251, 451) is used for measuring, by use of the digital signal, the energy of photons detected by the photoelectric detector. The above-mentioned photon measurement front-end circuit (200, 400, 800, 900) has a simple circuit structure, and therefore power consumption can be reduced and costs can be reduced. Besides, energy measurement is not affected by the starting time of the initial signal.

According to one embodiment, a radiation detector includes an array substrate including a plurality of control lines, a plurality of data lines, and a plurality of detection parts, the detection parts detecting radiation directly or in cooperation with a scintillator, a signal detection circuit reading out an image data signal from the plurality of detection parts, a noise detection circuit detecting a noise, a plurality of first wirings, one end portion of each of the first wirings being electrically connected to the data lines, other end portion of each of the first wirings being electrically connected to the signal detection circuit, and a second wiring, one end portion of the second wiring being not electrically connected to the data lines being electrically connected to the plurality of detection parts.

A radiation detector includes an array of detector pixels each including an array of detector cells. Each detector cell includes a photodiode biased in a breakdown region and digital circuitry coupled with the photodiode and configured to output a first digital value in a quiescent state and a second digital value responsive to photon detection by the photodiode. Digital triggering circuitry is configured to output a trigger signal indicative of a start of an integration time period responsive to a selected number of one or more of the detector cells transitioning from the first digital value to the second digital value. Readout digital circuitry accumulates a count of a number of transitions of detector cells of the array of detector cells from the first digital state to the second digital state over the integration time period.

A detector of an embodiment includes a plurality of photomultipliers, a signal line, and identifying circuitry. The photomultipliers each convert light converted from radiation into an electric signal and output the electric signal. The signal line has a first path and a second path through which the electric signal passes and that have different lengths for each of the photomultipliers. The identifying circuitry identifies the photomultiplier that outputs the electric signal by a time difference between the electric signal passing through the first path and the electric signal passing through the second path.

A radiometric detector is provided for detecting a measurement variable. The detector is particularly failsafe with, simultaneously, a simple, space-saving and cost-effective design, without having losses in the signal-to-noise ratio.

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

A radiation imaging apparatus is provided. The apparatus comprises a scintillator configured convert radiation into light, a sensor panel in which a plurality of pixels each comprising a light detector configured to detect the light is arranged in a two-dimensional array, and a processing unit. The processing unit comprises a signal generating unit configured to output signals indicating intensities of the light detected by the light detector of each of the plurality of pixels, and a detection unit configured to identify a group of pixels each of which outputs a signal of a level exceeding a reference value out of the signals and detect, based on a pattern of the group, pileup in which a plurality of radiation photons is detected as a single radiation photon.

The present invention provides a radiation detector, a radiographic imaging device and a radiographic imaging system that may detect radiation with high precision. Namely, in the radiation detector, radiation detection pixels include detection TFTs, and light that has been converted from radiation is illuminated directly from a scintillator onto the detection TFTs. Accordingly, leak current occurs in semiconductor active layers of the detection TFTs corresponding to the amount (intensity) of the illuminated light, and the leak current flows in to signal lines. Accordingly, radiation may be detected by monitoring the leak current, and enables timings, such as the start of irradiation of radiation, to be detected.