Kabushiki Kaisha Toshiba

Semiconductor Energy Laboratory Co., Ltd.

Toshiba Medical Systems Corporation

Canon Medical Systems Corporation

Shunsuke Kimura

Hideyuki Funaki

Go Kawata

Tetsuro Itakura

Masanori Furuta

Hirokatsu Shirahama

Shunpei Yamazaki

Tomoaki Moriwaka

Rei Hasegawa

Toshihiko Takeuchi

Naoto Yamade

Hiroshi Fujiki

Hiroshi Ota

Kazuya Hanaoka

Toshiyuki Ono

Nobuyoshi Saito

Keita Sasaki

Ikuo Fujiwara

Shintaro Nakano

Yasuharu Hosono

A semiconductor device that can be miniaturized or highly integrated is provided. The semiconductor device includes a first conductor, a second conductor over the first conductor, a first insulator covering the second conductor, a first oxide over the first insulator, and a second oxide over the first oxide, an opening overlapping with at least part of the first conductor is provided in the first oxide and the first insulator, and the second oxide is electrically connected to the first conductor through the opening.

Integrated semiconductor with shared electrodes between capacitor and transistor

Semiconductor device and method for manufacturing semiconductor device

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.

Radiation measuring apparatus, computer program product, and radiation computed tomography apparatus

A waveform shaping filter according to an embodiment includes at least one filter stage and a control circuit. The filter stage includes a differentiation signal generation circuit, a proportional signal generation circuit, and an adder circuit. The differentiation signal generation circuit generates a differentiation signal obtained by amplifying a differentiation component of an input signal. The proportional signal generation circuit generates a proportional signal obtained by amplifying the input signal. The adder circuit outputs an output signal obtained by adding the proportional signal and the differentiation signal. The control circuit compares the output signal and a first detection level, detects at least one of an overshoot and an undershoot of the output signal, and controls a time constant of the filter stage, based on a detection result.

Waveform shaping filter, integrated circuit, radiation detection device, method for adjusting time constant of waveform shaping filter, and method for adjusting gain of waveform shaping filter

According to an embodiment, a photon detecting element includes one or more avalanche photodiodes and a circuit. The circuit is connected between cathodes of the one or more avalanche photodiodes and an external power source. The circuit is configured in which a first temperature coefficient representing variation of a setting potential with respect to temperature variation when constant-current driving is performed so that electrical potential of the cathodes becomes equal to the setting potential is substantially the same as a second temperature coefficient representing variation of breakdown voltage of the one or more avalanche photodiodes with respect to temperature variation.

Photon detecting element, photon detecting device, and radiation analyzing device

A radiation detection apparatus according to an embodiment includes a radiation detector that detects radiation; a first measurer that measures energy of the radiation from the radiation detected by the radiation detector; and a second measurer that measures the number of times that the radiation detector detects the radiation.

Radiation detection apparatus

A pulse detection circuit according to an embodiment includes a conversion circuit, a delay circuit, first and second comparators, a latch, and a generation circuit. The conversion circuit converts an input signal into a thermometer code signal. The delay circuit outputs a delay signal being the thermometer code signal delayed by a predetermined delay time. The first comparator (The second comparator) compares the thermometer code signal with the delay signal and outputs an increase signal (a decrease signal) indicating whether the input signal is larger (smaller) than the input signal before the delay time. Based on the increase signal and the decrease signal, the latch outputs an increase-decrease signal indicating whether the input signal is increasing or decreasing. Based on the thermometer code signal and the increase-decrease signal, the generation circuit generates a pulse detection signal and a pileup detection signal.

Pulse detection circuit, radiation detection circuit, and radiation detection apparatus

According to an embodiment, a signal processor includes an integrator, a differentiator, a zero cross detector, a pile-up detector, an event interval detector, a counter, and a creator. The integrator is configured to calculate charge of current from a photoelectric converter for an incident radiation. The differentiator is configured to calculate a differential value of the current. The zero cross detector is configured to detect a zero cross of the differential value. The pile-up detector is configured to detect pile-up of the current based on the zero cross. The event interval detector is configured to detect, based on the zero cross and pile-up, an event interval of the radiation entering. The counter is configured to count, based on the charge and pile-up, the respective numbers of events according to the charge and the event interval. The creator is configured to create histograms for the numbers of events.

Signal processor and radiation detection device

According to an embodiment, a photon detector includes a photoelectric converter, a voltage supplier, a potential variation detector, and an adjustor. The photoelectric converter performs photoelectric conversion based on an incident photon and outputs current corresponding to number of photons. The voltage supplier supplies a voltage to the photoelectric converter. The potential variation detector detects potential variation of a cathode of the photoelectric converter. The adjustor adjusts a potential of an anode of the photoelectric converter based on the potential variation detected by the potential variation detector so that variation in a potential difference between the cathode and the anode of the photoelectric converter is reduced, and outputs current from the photoelectric converter to the outside.

Photon detector, radiation analyzer, and computer program product

According to an embodiment, an apparatus includes a first detector, a second detector, and a controller. The first detector is configured to detect first radiation at a first frequency within a first time by at least a first radiation detecting element and a second radiation detecting element that are positioned near to each other, and output a first signal. The second detector is configured to detect second radiation at a second frequency less than the first frequency within a second time by at least the first radiation detecting element and the second radiation detecting element, and output a second signal. The controller is configured to generate a third signal representing a difference between the first signal and the second signal, and calculate energy using the third signal.

Radiation detecting apparatus, input-output calibration method, and computer program product

According to an embodiment, a detection device includes a plurality of first detectors and a plurality of second detectors. The plurality of first detectors are arranged on a two-dimensional plane. Each first detector is configured to detect photons in a photon-counting manner. The plurality of second detectors are arranged on the two-dimensional plane. Each second detector is configured to detect photons in a charge-integrating manner.

Detection device and data processing method

According to an embodiment, a circuit includes a shunt and a controller. The shunt shunts input current into a plurality of current paths. The controller controls a gain of current inputted to the shunt by combining the current that is shunted into the current paths by the shunt in combination corresponding to a first signal from the outside or changing a shunt ratio with which the shunt shunts the current into the current paths corresponding to the first signal.

Growing community of inventors

Kanagawa, Japan

Shunsuke Kimura