Kabushiki Kaisha Toshiba

Canon Medical Systems Corporation

Toshiba Medical Systems Corporation

Go Kawata

Hideyuki Funaki

Shunsuke Kimura

Tetsuro Itakura

Masanori Furuta

Rei Hasegawa

Hirokatsu Shirahama

Yasuharu Hosono

Hiroaki Nakai

Kazuhiro Suzuki

Fumihiko Aiga

Honam Kwon

Isao Takasu

Risako Ueno

Atsushi Wada

Yuko Nomura

Kohei Nakayama

Manabu Teshigawara

Satomi Taguchi

Hyangmi Jung

Kazunori Miyazaki

Hiroshi Ota

Toshiyuki Ono

Nobuyoshi Saito

Sadanori Tomiha

Keita Sasaki

Shintaro Nakano

Mitsuyoshi Kobayashi

Ryo Okuda

Keiko Fujii

Tatsuo Osaka

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.

X-ray CT apparatus

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.

Nuclear medicine diagnostic device, data processing method, and non-transitory computer-readable medium with detection timing correction

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.

Radiation detection device, radiation diagnostic device, radiation detection method, and computer program product

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.

Radiation diagnosis device with a first detector detecting Cherenkov light and a second detector detecting energy information of radiation

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.

Data processing apparatus, data processing method, and non-transitory computer-readable storage medium for storing data processing program

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.

Radiation detector

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.

Radiation diagnostic device comprising a first detector for detecting Cherenkov light and a second detector for detecting scintillation light, correction method for Compton scattering, and non-transitory computer-readable medium

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.

Radiation detector and radiation diagnosis apparatus

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.

X-ray imaging apparatus and monochromatic x-ray generating method

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.

Radiation detector and X-ray CT apparatus

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.

Detection element and detector

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.

A detection apparatus according to an embodiment includes first detectors, a first electrode, second detectors and a second electrode. The first detectors detect a photon. The first electrode is electrically connected to each of the first detectors. The second detectors detect a photon. The second electrode is electrically connected to each of the second detectors. The number of first detectors is less than the number of second detectors.

Detection apparatus and detection method

According to an embodiment, a photon counting CT apparatus includes a scintillator, a photodiode array, a holder, a divider, and an image generator. The scintillator is configured to convert X-rays into light. The array includes first and second pixels. The first pixel includes a photodiode in a first range receiving the light emitted from the scintillator. The photodiode outputs an electrical signal based on the light. The second pixel includes a photodiode in a second range different from the first range. The holder is circuitry configured to hold a value of an electrical signal output by the second pixel. The divider circuitry is configured to count the number of photons of light incident on the first pixel by dividing an integrated value of electrical signals output by the first pixel by the held value. The image generator is circuitry configured to reconstruct an image based on the counted number.

Photon counting CT apparatus, light detection device, radiation detection device, and radiation analysis device

According to an embodiment, a radiation measuring apparatus includes a detector, comparators, a threshold controller, counters, and a generator. The detector includes plural detecting elements each configured to convert energy of incident radiation into a first electrical signal. The comparators correspond to the respective detecting elements, each comparator being configured to output a second electrical signal when a level of the corresponding first electrical signal is not less than a threshold. The threshold controller is configured to supply a first value as the threshold to the respective comparators at a first time, and supply a second value as the threshold to the respective comparators at a second time. The counters correspond to the respective comparators, each counter being configured to count the corresponding second electrical signal. The generator is configured to generate a pulse height frequency distribution of the radiation by using counts of the counters.

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Kawasaki, Japan

Go Kawata