Abstract: A nuclear medicine diagnostic device according to an embodiment includes processing circuitry. The processing circuitry obtains first photon-number information detected by a first detector; calculates, based on the first photon-number information, a first light emission probability model corresponding to the first detector; identifies, based on the first light emission probability model, a first timing at which the detection probability becomes equal to or greater than a predetermined threshold value; measures the detection timing of an event detected by the first detector; and corrects the detection timing based on the first timing.

Abstract: A nuclear medicine diagnosis apparatus according to an embodiment includes processing circuitry. The processing circuitry is configured: to obtain first photon number information detected by a first detector and second photon number information detected by a second detector different from the first detector; to calculate a first light emission probability model corresponding to the first detector on the basis of the first photon number information and a second light emission probability model corresponding to the second detector on the basis of the second photon number information; and to specify a probability distribution model related to a detection time difference along a Line Of Response (LOR) defined by the first detector and the second detector, on the basis of the first light emission probability model and the second light emission probability model.

Abstract: A data processing apparatus according to an embodiment includes acquisition circuitry and specification circuitry. The acquisition circuitry is configured to acquire a detector signal containing a first component that is based on Cherenkov light and a second component that is based on scintillation light. The specification circuitry is configured to specify timing information about generation of the detector signal by curve fitting to the first component.

Abstract: An X-ray CT apparatus of one embodiment includes an X-ray tube, a first X-ray detector, a rotator, and a second X-ray detector. The X-ray tube generates an X-ray. The first X-ray detector is arranged so as to face the X-ray tube and detects the X-ray that has transmitted through a subject. The rotator supports the X-ray tube and the first X-ray detector in a rotatable manner. The second X-ray detector detects a characteristic X-ray that is generated in accordance with a substance in the subject.

Abstract: A radiation diagnostic device according to an aspect of the present invention includes a first detector, a second detector, and processing circuitry. The first detector detects Cherenkov light that is generated when radiation passes. The second detector is disposed to be opposed to the first detector on a side distant from a generation source of the radiation, and detects energy information of the radiation. The processing circuitry specifies Compton scattering events detected by the second detector, and determines an event corresponding to an incident channel among the specified Compton scattering events based on a detection result obtained by the first detector.

Abstract: 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.

Abstract: A radiation detection device according to an embodiment includes a scintillator and a processing circuit. The processing circuit measures transferred energy when scintillation is caused after a gamma ray incident on a scintillator generates Cherenkov light and estimates a Cherenkov angle based on the transferred energy.

Abstract: A radiation detector according to an embodiment includes: a cathode electrode, a plurality of anode electrodes, a crystal, an anti-scatter grid, and a conductive part. The cathode electrode is provided on the radiation incident side. The plurality of anode electrodes are arranged so as to oppose the cathode electrode. The crystal is provided between the cathode electrode and the plurality of anode electrodes and configured to convert incident radiation into electrons. The conductive part is provided between the plurality of anode electrodes and has a conductivity higher than that of the crystal. The anti-scatter grid is provided on the radiation incident side of the cathode electrode so as to oppose the conductive part via the crystal, while being arranged in a first direction.

Abstract: A data processing apparatus according to an embodiment includes acquisition circuitry and specification circuitry. The acquisition circuitry is configured to acquire a detector signal containing a first component that is based on Cherenkov light and a second component that is based on scintillation light. The specification circuitry is configured to specify timing information about generation of the detector signal by curve fitting to the first component.

Abstract: A radiation detector according to an embodiment includes a light emitting element, an optical sensor, and a filter. The light emitting element generates light in conjunction with radiation becoming incident thereto. The optical sensor detects the light. The filter is provided between the light emitting element and the optical sensor and passes only a certain wavelength of the light so that delay time until the light is detected becomes shorter.

Abstract: 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.

Abstract: A radiation diagnostic device according to an aspect of the present invention includes a first detector, a second detector, and processing circuitry. The first detector detects Cherenkov light that is generated when radiation passes. The second detector is disposed to be opposed to the first detector on a side distant from a generation source of the radiation, and detects energy information of the radiation. The processing circuitry specifies Compton scattering events detected by the second detector, and determines an event corresponding to an incident channel among the specified Compton scattering events based on a detection result obtained by the first detector.

Abstract: An X-ray imaging apparatus according to an embodiment of the present disclosure includes an X-ray tube, a photon counting X-ray detector, and a filter unit. A generating unit of the X-ray tube is configured to generate X-rays. The photon counting X-ray detector is configured to count photons contained in the X-rays. The filter unit is provided between the X-ray tube and the photon counting X-ray detector. The filter unit includes a first filter and a second filter. The first filter is configured to shape a spectrum of the X-rays. The second filter is configured to generate X-ray fluorescence on the basis of X-rays related to a spectrum resulting from the shaping by the first filter.

Abstract: A radiation detector according to an embodiment includes: a cathode electrode, a plurality of anode electrodes, a crystal, an anti-scatter grid, and a conductive part. The cathode electrode is provided on the radiation incident side. The plurality of anode electrodes are arranged so as to oppose the cathode electrode. The crystal is provided between the cathode electrode and the plurality of anode electrodes and configured to convert incident radiation into electrons. The conductive part is provided between the plurality of anode electrodes and has a conductivity higher than that of the crystal. The anti-scatter grid is provided on the radiation incident side of the cathode electrode so as to oppose the conductive part via the crystal, while being arranged in a first direction.

Abstract: A radiation detector according to an embodiment includes a sensor, an electronic circuitry, a switch, and a control circuitry. The sensor configured to be formed of plural electrodes and detect radiation. Based on signals output from the electrodes, the electronic circuitry configured to output digital data. The switch configured to be provided between each of the electrodes and the electronic circuitry. The control circuitry configured to control the switch, based on a positional relation between the plural electrodes and an anti-scatter grid.

Abstract: According to an embodiment, a detection element includes a first electrode, a second electrode, an organic conversion layer, and a third electrode. The organic conversion layer is provided between the first electrode and the second electrode, and is configured to convert energy of a radiant ray into a charge. The third electrode is provided inside the organic conversion layer. Bias is applied to the third electrode.

Abstract: A radiation diagnosis device according to an embodiment includes a first detector and a second detector. The first detector detects Cherenkov light generated when a radiation passes. The second detector is provided to face the first detector on a side farther from a source of generating the radiation and detects the energy information of the radiation.

Abstract: An X-ray imaging apparatus according to an embodiment of the present disclosure includes an X-ray tube, a photon counting X-ray detector, and a filter unit. A generating unit of the X-ray tube is configured to generate X-rays. The photon counting X-ray detector is configured to count photons contained in the X-rays. The filter unit is provided between the X-ray tube and the photon counting X-ray detector. The filter unit includes a first filter and a second filter. The first filter is configured to shape a spectrum of the X-rays. The second filter is configured to generate X-ray fluorescence on the basis of X-rays related to a spectrum resulting from the shaping by the first filter.

Abstract: A radiation detector according to an embodiment includes a sensor, an electronic circuitry, a switch, and a control circuitry. The sensor configured to be formed of plural electrodes and detect radiation. Based on signals output from the electrodes, the electronic circuitry configured to output digital data. The switch configured to be provided between each of the electrodes and the electronic circuitry. The control circuitry configured to control the switch, based on a positional relation between the plural electrodes and an anti-scatter grid.

Abstract: According to an embodiment, a detection element includes a first electrode, a second electrode, an organic conversion layer, and a third electrode. A bias is applied to the first electrode. The organic conversion layer is arranged between the first electrode and the second electrode, and is configured to convert energy of a radiation into an electric charge. The third electrode is arranged in the organic conversion layer.