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公开(公告)号：US10761222B2
公开(公告)日：2020-09-01
申请号：US16121754
申请日：2018-09-05
发明人： Kohei Nakayama , Fumihiko Aiga , Go Kawata , Isao Takasu , Yuko Nomura , Satomi Taguchi , Hyangmi Jung , Atsushi Wada , Rei Hasegawa
摘要： 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.
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公开(公告)号：US09945962B2
公开(公告)日：2018-04-17
申请号：US15259835
申请日：2016-09-08
IPC分类号： G01T1/20 , G01T1/17 , G01R19/175
CPC分类号： G01T1/2018 , G01R19/175 , G01T1/17 , G01T1/171
摘要： 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.
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公开(公告)号：US09647677B2
公开(公告)日：2017-05-09
申请号：US15138667
申请日：2016-04-26
发明人： Hirokatsu Shirahama , Shunsuke Kimura , Tetsuro Itakura , Masanori Furuta , Hideyuki Funaki , Go Kawata
摘要： An integrator according to an embodiment includes first and second nodes, first to fifth switches, first and second main integration capacitors, and a first subsidiary integration capacitor. The first (second, third, fourth, fifth) switch has one end connected to a first (third, first, fourth, first) node and the other end connected to a third (second, fourth, second, fifth) node. The first main integration capacitor has one end connected to the third node and the other end connected to a standard voltage line. The second main integration capacitor has one end connected to the fourth node and the other end connected to the standard voltage line. The first subsidiary integration capacitor that has one end connected to the fifth node and the other end connected to the standard voltage line.
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公开(公告)号：US20150270840A1
公开(公告)日：2015-09-24
申请号：US14636593
申请日：2015-03-03
CPC分类号： H03K21/38 , G01R1/203 , G01R19/0023 , G01R19/0092 , G01R19/15 , H03K5/24
摘要： A current detection circuit according to one embodiment includes a low-pass filter, a voltage-to-current converter circuit, and a comparator. The low-pass filter has a first terminal connected to a signal input terminal to which a signal current is input. The voltage-to-current converter circuit has a first terminal connected to a second terminal of the low-pass filter and has a second terminal connected to the signal input terminal. The comparator has a first input terminal and a second input terminal and outputs a signal according to a difference between a signal input through the first input terminal and a signal input through the second input terminal, the first input terminal being connected to the second terminal of the low-pass filter, and the second input terminal being connected to the second terminal of the voltage-to-current converter circuit.
摘要翻译： 根据一个实施例的电流检测电路包括低通滤波器，电压 - 电流转换器电路和比较器。 低通滤波器具有连接到输入信号电流的信号输入端的第一端子。 电压 - 电流转换器电路具有连接到低通滤波器的第二端子的第一端子，并且具有连接到信号输入端子的第二端子。 比较器具有第一输入端子和第二输入端子，并且根据通过第一输入端子输入的信号与通过第二输入端子输入的信号之间的差异输出信号，第一输入端子连接到第二输入端子的第二端子 低通滤波器和第二输入端子连接到电压 - 电流转换器电路的第二端子。
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公开(公告)号：US09543961B2
公开(公告)日：2017-01-10
申请号：US14636593
申请日：2015-03-03
CPC分类号： H03K21/38 , G01R1/203 , G01R19/0023 , G01R19/0092 , G01R19/15 , H03K5/24
摘要： A current detection circuit according to one embodiment includes a low-pass filter, a voltage-to-current converter circuit, and a comparator. The low-pass filter has a first terminal connected to a signal input terminal to which a signal current is input. The voltage-to-current converter circuit has a first terminal connected to a second terminal of the low-pass filter and has a second terminal connected to the signal input terminal. The comparator has a first input terminal and a second input terminal and outputs a signal according to a difference between a signal input through the first input terminal and a signal input through the second input terminal, the first input terminal being connected to the second terminal of the low-pass filter, and the second input terminal being connected to the second terminal of the voltage-to-current converter circuit.
摘要翻译： 根据一个实施例的电流检测电路包括低通滤波器，电压 - 电流转换器电路和比较器。 低通滤波器具有连接到输入信号电流的信号输入端的第一端子。 电压 - 电流转换器电路具有连接到低通滤波器的第二端子的第一端子，并且具有连接到信号输入端子的第二端子。 比较器具有第一输入端子和第二输入端子，并且根据通过第一输入端子输入的信号与通过第二输入端子输入的信号之间的差异输出信号，第一输入端子连接到第二输入端子的第二端子 低通滤波器和第二输入端子连接到电压 - 电流转换器电路的第二端子。
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公开(公告)号：US09344661B2
公开(公告)日：2016-05-17
申请号：US14682173
申请日：2015-04-09
发明人： Nobuyoshi Saito , Hideyuki Funaki , Shunsuke Kimura , Shintaro Nakano , Go Kawata , Rei Hasegawa
IPC分类号： H01L27/146 , H04N5/378 , G01T1/20 , G01T1/208 , G01T1/24 , H01L31/107
CPC分类号： H04N5/378 , G01T1/208 , G01T1/248 , H01L27/14607 , H01L27/14636 , H01L31/107
摘要： According to an embodiment, a photodetector includes a plurality of photoelectric transducers, a plurality of resistors, and a plurality of resetting sections. Each of the photoelectric transducers is configured to output a detection signal resulting from conversion of received light into an electric charge. Each of the resistors is connected in series with an output end of a corresponding photoelectric transducer at one end of the resistor. Each of the resetting sections is connected in parallel with a corresponding resistor and configured to bring the output end of the corresponding photoelectric transducer to a reset level in response to the detection signal.
摘要翻译： 根据实施例，光电检测器包括多个光电换能器，多个电阻器和多个复位部分。 每个光电换能器被配置为输出由接收光转换成电荷而产生的检测信号。 每个电阻器与电阻器一端的相应的光电变换器的输出端串联连接。 每个复位部分与对应的电阻器并联连接，并且被配置为响应于检测信号使相应的光电转换器的输出端达到复位电平。
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公开(公告)号：US09952334B2
公开(公告)日：2018-04-24
申请号：US15165182
申请日：2016-05-26
发明人： Hirokatsu Shirahama , Tetsuro Itakura , Masanori Furuta , Shunsuke Kimura , Go Kawata , Hideyuki Funaki
CPC分类号： G01T1/17 , G01T1/18 , G01T1/2018 , G01T1/24
摘要： 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.
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公开(公告)号：US09877689B2
公开(公告)日：2018-01-30
申请号：US15262398
申请日：2016-09-12
发明人： Go Kawata , Shunsuke Kimura , Rei Hasegawa
CPC分类号： A61B6/4241 , A61B6/032 , A61B6/4233 , G01T1/17 , G01T1/18 , G01T1/20 , G01T1/2985
摘要： 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.
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公开(公告)号：US09377540B2
公开(公告)日：2016-06-28
申请号：US14694583
申请日：2015-04-23
发明人： Go Kawata , Hideyuki Funaki , Honam Kwon , Risako Ueno , Kazuhiro Suzuki
CPC分类号： G01T1/2002 , G01N23/046 , G01T1/2018 , G01T1/248
摘要： A radiation detection apparatus according to an embodiment includes: a scintillator; a photon detection device array including a plurality of cells each being a photon detection device with an avalanche photodiode configured to detect visible radiation photons emitted from the scintillator and a resistor disposed along a part of a periphery of an active region of the avalanche photodiode; and a reflector configured to reflect a visible radiation photon and disposed in a region that does not include the active regions and the resistors of the cells, on a face including the active regions.
摘要翻译： 根据实施例的放射线检测装置包括：闪烁体; 光子检测装置阵列，其包括多个单元，每个单元均为具有雪崩光电二极管的光子检测装置，所述雪崩光电二极管被配置为检测从所述闪烁体发射的可见光辐射光子和沿着所述雪崩光电二极管的有源区的周边的一部分设置的电阻器; 以及反射器，被配置为在包括有源区域的面上反射可见光辐射并且被布置在不包括电池的有源区域和电阻器的区域中。
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10.发明申请PHOTON COUNTING CT APPARATUS, LIGHT DETECTION DEVICE, RADIATION DETECTION DEVICE, AND RADIATION ANALYSIS DEVICE 审中-公开光电计数CT装置，光检测装置，辐射检测装置和辐射分析装置公开(公告)号：US20160045176A1
公开(公告)日：2016-02-18
申请号：US14922873
申请日：2015-10-26
发明人： Shunsuke KIMURA , Hideyuki Funaki , Go Kawata
CPC分类号： A61B6/4241 , A61B6/03 , A61B6/032 , A61B6/035 , A61B6/4035 , A61B6/4042 , A61B6/42 , A61B6/4208 , A61B6/4233 , A61B6/463 , A61B6/481 , A61B6/482 , A61B6/5205 , A61B6/5258 , A61B6/54 , G01T1/17 , G01T1/20 , G01T1/2018 , G01T1/208 , H04N5/32
摘要： 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.
摘要翻译： 根据实施例，光子计数CT装置包括闪烁体，光电二极管阵列，保持器，分隔器和图像发生器。 闪烁体被配置为将X射线转换成光。 该阵列包括第一和第二像素。 第一像素包括在接收从闪烁体发射的光的第一范围内的光电二极管。 光电二极管输出基于光的电信号。 第二像素包括在与第一范围不同的第二范围内的光电二极管。 保持器是被配置为保持由第二像素输出的电信号的值的电路。 分频器电路被配置为通过将由第一像素输出的电信号的积分值除以保持值来对入射在第一像素上的光的光子数进行计数。 图像发生器是被配置为基于所计数的数字重建图像的电路。
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