An X-ray detector unit is disclosed. In an embodiment, the X-ray detector unit includes: at least one analysis unit to process electrical signals delivered from a coupled converter unit and operatable by an operating voltage; an adjustable voltage supply, coupled to the at least one analysis unit, to provide an adjustable supply voltage; an identification unit, assigned to the at least one analysis unit, to provide identification information about the at least one analysis unit in a readable manner; and a communication unit, coupled to the adjustable voltage supply, to read the identification information provided from the identification unit, and based upon the identification information provided, to adjust the adjustable voltage supply to equate the provided supply voltage to the operating voltage of the at least one analysis unit.

A sensor for spectroscopic measurement of alpha and beta particles includes first and second layers, a photomultiplier, and an analyzer. A first material of the first layer scintillates a first stream of photons for each of the alpha particles. However, the beta particles pass through the first layer. A second material of the second layer scintillates a second stream of photons for each of the beta particles, but passes the first stream of photons for each alpha particle. The photomultiplier amplifies the first and second streams of photons for the alpha and beta particles into an electrical signal. The electrical signal includes a respective pulse for each of the alpha and beta particles. From the electrical signal, the analyzer determines a respective energy of each of the alpha and/or beta particles from a shape of the respective pulse for each of the alpha and beta particles.

A method and a system for a two-step calibration method for the polychromatic semiconductor-based PCD forward counting model, to account for various pixel summing readout modes for imaging at different resolutions. The flux independent weighted bin response function is estimated using the expectation maximization method, and then used to estimate the pileup correction terms at plural tube voltage settings for each detector pixel. To correct the variation of the detector response due to different PCD sub-pixel summing schemes, the embodiments calibrate forward model parameters based on the various pixel readout modes.

A photosensor substrate (10) includes a plurality of sensor units (1). The sensor units (1) each include a switching element (2), a lower electrode (3) connected to the switching element (2), and a photoelectric conversion element (4). The photosensor substrate (10) includes lines (G and D) connected to the switching elements of the plurality of sensor units and led out of a sensor area (SA), and terminal parts (TG and TD) connected to the lines (G and D) led out of the sensor area (SA). The terminal parts (TG and TD) each include a protective layer (4a) overlapped with the line (G or D) led out of the sensor area and containing a material for the photoelectric conversion element (4), and a terminal conductor (6) connected to the line (G or D) via an opening (CH1) provided in the protective layer (4a).

A method of operating a radiation imaging apparatus including a sensor substrate which includes a plurality of pixels arranged in a matrix, each pixel including a conversion element configured to convert radiation or light into an electric charge and accumulate the electric charge and a switch element. The method includes, supplying a first driving potential to set the switch element in a non-conductive state, changing a bias potential supplied to a second terminal of the conversion element to remain a charge in the conversion element, supplying a second driving potential to the switch element to readout a remaining charge, and calculating a threshold voltage of the switch element based on the remaining charge.

A radiation detector according to an embodiment includes a scintillator array, a sensor array, electronic circuitry, a switch, and control circuitry. The scintillator array includes a plurality of scintillator pixels each configured to convert radiation into light. The sensor array includes a plurality of detection elements each configured to detect the light. The electronic circuitry is configured to output digital data on the basis of signals output from the detection elements. The switch is provided between the sensor array and the electronic circuitry. The control circuitry is configured to control the switch on the basis of a positional relation between the sensor array and the scintillator array.

An electronic read circuit for a radiation detector comprises: an element sensitive to the radiation, an injection circuit, able to inject a charge at one terminal of the sensitive element, the injection circuit extending between at least one input terminal and one output terminal, the output terminal being able to be connected to the sensitive element, the injection circuit being able to produce a charge under the effect of a trigger pulse. The injection circuit is able to inject a first charge when an input terminal is connected to a first input potential and a second charge when an input terminal is connected to a second input potential. The circuit comprises means for storing a difference between an output potential of the injection circuit, called equilibrium potential, and a reference potential, such that the second charge depends on the second input potential and on the equilibrium potential.

A radiographic image capturing apparatus includes: a pixel array in which a plurality of pixels outputting an electrical signal corresponding to radiation are arranged; a readout circuit section; and a member for preventing radiation from entering the readout circuit section. The pixel array includes a first region in which some pixels used for generating image signals are arranged, and a second region in which other pixels not used for generating the image signals are arranged in at least part of a region around the first region. From an outer side toward an inner side of the pixel array, an end on the inner side of the readout circuit section disposed in the second region, an end on the inner side of an orthogonal projection of the member to the pixel array, and an end on the inner side of the second region are arranged in this order.

An X-ray detector includes a detection unit to convert X-rays into a signal value and an evaluation unit. The detection unit and the evaluation unit are configured in a common component, the extent of the component along a first direction being not greater than the extent of the detection unit. The evaluation unit includes at least one correction unit to correct the signal values, a computation unit to control the correction, and a memory unit to store at least one correction parameter. The evaluation unit is designed such that the signal values are corrected as a function of the at least one correction parameter. A method and detector group are also disclosed.

A radiation imaging apparatus has a plurality of pixels including a plurality of imaging pixels for obtaining a radiation image and a detecting pixel for detecting radiation, a plurality of column signal lines, and a detection signal line corresponding to the detecting pixel. Each of the imaging pixels includes a first conversion element configured to convert radiation into an electrical signal, and a first switch arranged between the first conversion element and a corresponding column signal line among the plurality of column signal lines. The detecting pixel includes a second conversion element configured to convert radiation into an electrical signal, and a second switch arranged between the second conversion element and the detection signal line.