A radiation image capturing apparatus includes: scanning lines and signal lines; radiation detection elements; a scan driver switching a switching element of the radiation detection elements between on and off; and a readout IC incorporating readout circuits reading, as image data, electric charges from each radiation detection element, the readout circuit including: an integrating circuit outputting a voltage value corresponding to the electric charges; a reset switch resetting the integrating circuit; a first sample-and-hold circuit holding, as a reference value, the voltage value before the electric charges flow; a second sample-and-hold circuit holding, as a signal value, the voltage value after the electric charges flow; and a difference circuit outputting difference between the signal value and the reference value, the radiation image capturing apparatus further including a mechanism changing the voltage value from completion of the resetting and turning off of the reset switch until holding of the reference value.

An X-ray diagnostic apparatus comprises an X-ray detector including a first detector and a second detector capable of simultaneously detecting X-rays irradiated from an X-ray tube, and processing circuitry configured to, when displaying one of a first image based on output from the first detector and a second image based on output from the second detector on a display, display the other one of the first image and the second image corresponding to a partial region of the one of the first image and the second image.

An X-ray diagnostic apparatus comprises: an X-ray detector including a first detector and a second detector capable of simultaneously detecting X-rays irradiated from an X-ray tube; and processing circuitry configured to correct, by using information of a second image that is based on an output from the second detector, a first image that is based on an output from the first detector.

According to one embodiment, an X-ray computed tomography apparatus includes an X-ray tube and an X-ray detector. The X-ray tube generates X-rays. The X-ray detector includes a first detection area detecting the X-rays and a second detection area detecting the X-rays. The first detection area includes a first scintillator having a first fluorescence decay time, the second detection area includes a second scintillator having a second fluorescence decay time shorter than the first fluorescence decay time. The second detection area is arranged at both ends of the first detection area with respect to a channel direction.

An object is to improve accuracy of photon counting in an imaging apparatus. The imaging apparatus includes a light uniformizing unit. The light uniformizing unit included in the imaging apparatus substantially uniformizes distribution of photons in an orthogonal direction toward an optical axis of incident light, which is incident to an imaging element in the imaging apparatus and the number of photons of which is to be detected, a plurality of pixels being arranged to the imaging element. The light uniformizing unit supplies the uniformized light to the imaging element to which a plurality of pixels are arranged in the imaging apparatus.

Technology is described for generating a valid token control signal from control signals from a row driver. In one example, a matrix type integrated circuit includes a row driver module and a 2D array of cell elements. The row driver module includes a voting logic module and at least two row drivers configured to generate control signals on at least two communal lines for cell elements of a row of the 2D array. Each row driver is configured to generate control signals on at least three control lines where at least two control lines are the communal lines and coupled to a corresponding communal line of another row driver. The voting logic module is coupled to the at least three control lines of one of the row drivers and configured to generate an output based on the control signals on the at least three control lines.

A pixel circuit of an X-ray sensor includes a photo diode, a first transistor, a second transistor and a third transistor. The photo diode is used to sense X-rays and to generate a corresponding electrical sensing signal. The first transistor is electrically connected with the photo diode to reset the electrical sensing signal. The second transistor is electrically connected with the photo diode to amplify the electrical sensing signal and to generate an amplified sensing signal. The third transistor is electrically connected with the second transistor to output the amplified sensing signal. The second transistor has a terminal electrically connected with a high voltage, and the first transistor has a terminal electrically connected with a calibration voltage. The high voltage and the calibration voltage are controlled separately.

The present invention relates to X-ray imaging. In order to reduce X-ray dose exposure during X-ray image acquisition, an X-ray detector is provided that is suitable for phase contrast and/or dark-field imaging. The X-ray detector comprises a scintillator layer (12) and a photodiode layer (14). The scintillator layer is configured to convert incident X- ray radiation (16) modulated by a phase grating structure (18) into light to be detected by the photodiode layer. The scintillator layer comprises an array of scintillator channels (20) periodically arranged with a pitch (22) forming an analyzer grating structure. The scintillator layer and the photodiode layer form a first detector layer (24) comprising a matrix of pixels (26). Each pixel comprises an array of photodiodes (28), each photodiode forming a sub-pixel (30). Adjacent sub-pixels during operation receive signals having mutually shifted phases. The sub-pixels that during operation receive signals having mutually identical phase form a phase group per pixel. The signals received by the sub-pixels within the same phase group per pixel during operation are combined to provide one phase group signal (32). The phase group signals of different phase groups during operation are obtained in one image acquisition. In an example, the pitch of the scintillator channels is detuned by applying a correcting factor c to a fringe period (P.sub.fringe) of a periodic interference pattern (35) created by the phase grating structure, wherein 0<c<2.

A silicon photomultiplier (SiPM) based detection system includes a plurality of scintillators, SiPMs, a front end circuit, adjustment circuits, and an energy and position processing unit. The SiPMs have a non-linear response to energy deposition corresponding to radiation detection. The adjustment circuit is configured to receive an analog signal from SiPMs, and to provide an adjusted analog signal, which is configured to simulate a signal corresponding to a linear response. The energy and position processing unit utilizes the adjusted signal to provide energy and position information of detected events in the detector block.

A semiconductor photomultiplier (SPM) device is described. The SPM comprises a plurality of photosensitive elements, a first electrode arranged to provide a bias voltage to the photosensitive elements, a second electrode arranged as a biasing electrode for the photosensitive elements, a plurality of quench resistive elements each associated with a corresponding photosensitive element, a plurality of output loads; a first node of each output load is common to one of the photosensitive elements and the corresponding quench element; and a third electrode provides an output signal from the photosensitive elements; the third electrode is coupled to a second node of the respective output loads; the outputs loads fully or partially correct an overshoot of the output signal on the third electrode.