Patents by Inventor Yuichiro Ueno
Yuichiro Ueno has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20130146767Abstract: A radiation measuring device includes: a detector that detects radiation; a preamplifier that amplifies a signal outputted from the detector; a shaping amplifier that shapes the waveform of the signal outputted from the preamplifier; an A/D converter that converts the analog signal output from the shaping amplifier to a digital signal; and a digital data processing unit that calculates digital signal output from the A/D converter, wherein energy information of the radiation inputted to the detector is obtained from a pulse height of the pulse signal processed by the preamplifier and the shaping amplifier, and the pulse height of the current pulse is corrected in the digital data processing unit by performing an arithmetic operation using the pulse height information of the current pulse digitalized by the A/D converter, the generation time information of the preceding pulse, and the pulse height information of the preceding pulse.Type: ApplicationFiled: August 4, 2011Publication date: June 13, 2013Applicant: HITACHI, LTD.Inventors: Tomoyuki Seino, Yuichiro Ueno, Takafumi Ishitsu
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Publication number: 20120326045Abstract: The purpose of the present invention is to improve energy resolving power and prevent energy resolving power from deteriorating when a thick semiconductor detection element with a wide energy range is used, in a radiation measuring device using a semiconductor detector and a nuclear medicine diagnostic device. With the present invention, the purpose is achieved by pulsed wave value correction employing the difference of (Hs?Hf) between the pulsed wave height value Hs obtained from the slow speed shaping circuit, and the pulsed wave height value Hf obtained from the fast speed shaping circuit and normalized with respect to Hs. An even more desirable result may be obtained by employing either (Hs?Hf)/Hf or exp(k(Hs?Hf)/Hf), wherein k is a coefficient to be optimized, said optimization being dependent on the measurement assembly.Type: ApplicationFiled: February 3, 2011Publication date: December 27, 2012Applicant: HITACHI, LTD.Inventors: Tomoyuki Seino, Yuichiro Ueno, Takafumi Ishitsu
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Patent number: 8338792Abstract: Provided between a bias power supply and a radiation detector are a noise filter and a bias voltage transmitting circuit. In a state where the bias voltage is applied, the noise filter circuit operates. In a state where the bias voltage is switched on and off, the bias voltage transmitting circuit and the noise filter circuit operate. In a state where the bias voltage is switched on and off, the bias voltage transmitting circuit operates.Type: GrantFiled: February 19, 2010Date of Patent: December 25, 2012Assignee: Hitachi, Ltd.Inventors: Tomoyuki Seino, Yuichiro Ueno, Takafumi Ishitsu
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Patent number: 8148695Abstract: A PET apparatus comprises a plurality of detector units in the circumferential direction, wherein the detector unit includes a plurality of unit substrates therein, and wherein the unit substrate includes: a plurality of detectors upon which a ?-ray is incident; and an analog ASIC and digital ASIC for processing a ?-ray detection signal outputted by each of the detectors. The analog ASIC includes two slow systems having mutually different time constants, each of which outputs a pulseheight value. A noise determination part of the digital ASIC determines whether a relevant detection signal is an intended ?-ray detection signal or a noise based on a correlation between the pulseheight values, and a noise counting part counts the number of times of noise determination, and a detector output signal processing control part controls the signal processing with respect to an output signal from a relevant detector based on the count.Type: GrantFiled: May 13, 2011Date of Patent: April 3, 2012Assignee: Hitachi, Ltd.Inventors: Isao Takahashi, Takafumi Ishitsu, Yuichiro Ueno, Tomoyuki Seino
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Publication number: 20110297837Abstract: The radiation detection module (20) is provided with a semiconductor element (1) having a plurality of pixels (Pn), radiation detection elements (30) in which a plurality of first electrodes (31n) are arranged along one side of the semiconductor element (1), and a second electrode (32m) is disposed astride a plurality of pixels (Pn) along the other side, and which output detection signals when a radioactive ray comes incident on the detection pixels (Pn), and a support PCB (21) placed to stand along the direction in which the radioactive ray comes incident. The support PCB (21) has a connection section (21a) detachably connectable to an external connecting section. Radiation detection elements (30) are connected on the support PCB (21) to fabricate a signal read-out circuit having mutually-perpendicular wiring in a pseudo way and that the incident position of the radioactive ray is identified by coincidence determination of the detection signals.Type: ApplicationFiled: February 17, 2010Publication date: December 8, 2011Applicant: HITACHI, LTD.Inventors: Takafumi Ishitsu, Isao Takahashi, Katsutoshi Tsuchiya, Kazuma Yokoi, Yuichiro Ueno
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Publication number: 20110215254Abstract: A PET apparatus comprises a plurality of detector units in the circumferential direction, wherein the detector unit includes a plurality of unit substrates therein, and wherein the unit substrate includes: a plurality of detectors upon which a ?-ray is incident; and an analog ASIC and digital ASIC for processing a ?-ray detection signal outputted by each of the detectors. The analog ASIC includes two slow systems having mutually different time constants, each of which outputs a pulseheight value. A noise determination part of the digital ASIC determines whether a relevant detection signal is an intended ?-ray detection signal or a noise based on a correlation between the pulseheight values, and a noise counting part counts the number of times of noise determination, and a detector output signal processing control part controls the signal processing with respect to an output signal from a relevant detector based on the count.Type: ApplicationFiled: May 13, 2011Publication date: September 8, 2011Applicant: HITACHI, LTD.Inventors: Isao Takahashi, Takafumi Ishitsu, Yuichiro Ueno, Tomoyuki Seino
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Publication number: 20110204248Abstract: Provided between a bias power supply and a radiation detector are a noise filter and a bias voltage transmitting circuit. In a state where the bias voltage is applied, the noise filter circuit operates. In a state where the bias voltage is switched on and off, the bias voltage transmitting circuit and the noise filter circuit operate. In a state where the bias voltage is switched on and off, the bias voltage transmitting circuit operates.Type: ApplicationFiled: February 19, 2010Publication date: August 25, 2011Applicant: HITACHI, LTD.Inventors: Tomoyuki SEINO, Yuichiro UENO, Takafumi ISHITSU
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Patent number: 7964849Abstract: A PET apparatus comprises a plurality of detector units in the circumferential direction, wherein the detector unit includes a plurality of unit substrates therein, and wherein the unit substrate includes: a plurality of detectors upon which a ?-ray is incident; and an analog ASIC and digital ASIC for processing a ?-ray detection signal outputted by each of the detectors. The analog ASIC includes two slow systems having mutually different time constants, each of which outputs a pulseheight value. A noise determination part of the digital ASIC determines whether a relevant detection signal is an intended ?-ray detection signal or a noise based on a correlation between the pulseheight values, and a noise counting part counts the number of times of noise determination, and a detector output signal processing control part controls the signal processing with respect to an output signal from a relevant detector based on the count.Type: GrantFiled: July 16, 2010Date of Patent: June 21, 2011Assignee: Hitachi, Ltd.Inventors: Isao Takahashi, Takafumi Ishitsu, Yuichiro Ueno, Tomoyuki Seino
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Patent number: 7888648Abstract: A radiological measurement system protecting an amplifier from damage caused by a surge current, ensuring temporal continuity of measurement with a minimum dead time, and including a high voltage DC supply for applying a bias voltage to a radiation detector formed of semiconductor crystal, a controller for exercising on-off control on the bias voltage supplied from the high voltage DC supply, an amplifier, a protection circuit for protecting the amplifier from a surge current generated when the bias voltage is subjected to the on-off control, a control unit for preventing the surge current from flowing to the amplifier, and a switch provided in parallel with the protection circuit and controlled in operation state by the control unit, wherein the control unit controls the operation state of the switch in synchronism with the on-off control exercised by the control unit to prevent the surge current from flowing to the amplifier.Type: GrantFiled: February 18, 2009Date of Patent: February 15, 2011Assignee: Hitachi, Ltd.Inventors: Tomoyuki Seino, Takafumi Ishitsu, Yuichiro Ueno
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Publication number: 20100282974Abstract: A PET apparatus comprises a plurality of detector units in the circumferential direction, wherein the detector unit includes a plurality of unit substrates therein, and wherein the unit substrate includes: a plurality of detectors upon which a ?-ray is incident; and an analog ASIC and digital ASIC for processing a ?-ray detection signal outputted by each of the detectors. The analog ASIC includes two slow systems having mutually different time constants, each of which outputs a pulseheight value. A noise determination part of the digital ASIC determines whether a relevant detection signal is an intended ?-ray detection signal or a noise based on a correlation between the pulseheight values, and a noise counting part counts the number of times of noise determination, and a detector output signal processing control part controls the signal processing with respect to an output signal from a relevant detector based on the count.Type: ApplicationFiled: July 16, 2010Publication date: November 11, 2010Applicant: HITACHI, LTD.Inventors: Isao Takahashi, Takafumi Ishitsu, Yuichiro Ueno, Tomoyuki Seino
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Patent number: 7807974Abstract: A nuclear medical diagnosis apparatus capable of attaining improvement of the sensitivity by the reduction of a count loss of the data is provided. A data sort section inside a data acquisition unit re-arranges and outputs the data packet from a plurality of auxiliary data acquisition unit in order of the detection time data. A coincidence detection section includes a pair check section and a pair generation section. The pair check section refers to a context on the data packet re-arranged in order of the detection time, and judges a pair relating to a coincidence counting. The pair generation section, based on this judgment result, merges the data packet used as a pair, and outputs the same to the collection work station.Type: GrantFiled: February 20, 2008Date of Patent: October 5, 2010Assignee: Hitachi, Ltd.Inventors: Takafumi Ishitsu, Yuichiro Ueno, Kensuke Amemiya, Keiji Kobashi
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Patent number: 7795590Abstract: A PET apparatus comprises a plurality of detector units in the circumferential direction, wherein the detector unit includes a plurality of unit substrates therein, and wherein the unit substrate includes: a plurality of detectors upon which a ?-ray is incident; and an analog ASIC and digital ASIC for processing a ?-ray detection signal outputted by each of the detectors. The analog ASIC includes two slow systems having mutually different time constants, each of which outputs a pulseheight value. A noise determination part of the digital ASIC determines whether a relevant detection signal is an intended ?-ray detection signal or a noise based on a correlation between the pulseheight values, and a noise counting part counts the number of times of noise determination, and a detector output signal processing control part controls the signal processing with respect to an output signal from a relevant detector based on the count.Type: GrantFiled: September 26, 2007Date of Patent: September 14, 2010Assignee: Hitachi, Ltd.Inventors: Isao Takahashi, Takafumi Ishitsu, Yuichiro Ueno, Tomoyuki Seino
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Publication number: 20090242780Abstract: A radiological measurement system protecting an amplifier from damage caused by a surge current, ensuring temporal continuity of measurement with a minimum dead time, and including a high voltage DC supply for applying a bias voltage to a radiation detector formed of semiconductor crystal, a controller for exercising on-off control on the bias voltage supplied from the high voltage DC supply, an amplifier, a protection circuit for protecting the amplifier from a surge current generated when the bias voltage is subjected to the on-off control, a control unit for preventing the surge current from flowing to the amplifier, and a switch provided in parallel with the protection circuit and controlled in operation state by the control unit, wherein the control unit controls the operation state of the switch in synchronism with the on-off control exercised by the control unit to prevent the surge current from flowing to the amplifier.Type: ApplicationFiled: February 18, 2009Publication date: October 1, 2009Inventors: Tomoyuki SEINO, Takafumi Ishitsu, Yuichiro Ueno
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Patent number: 7541593Abstract: There are provided a radiation detection module, a printed circuit board, and a radiological imaging apparatus which make it possible to enhance spatial resolution without increasing channel number, and thereby to perform high-accuracy diagnosis. The radiation detection module includes a plurality of radiation detectors, and a wiring board on which the plurality of radiation detectors are mounted in a manner of being arranged in at least a radiation traveling direction. Here, on the wiring board, a pair of the radiation detectors which are adjacent to each other in the radiation traveling direction are electrically connected to each other, thereby configuring one detector structure (i.e., detection channel). Moreover, the radiation detectors are mounted onto the wiring board such that respective connection parts of electrodes, which are to be electrically connected to each other, are in a mutually-facing state.Type: GrantFiled: September 8, 2006Date of Patent: June 2, 2009Assignees: Hitachi, Ltd., Acrorad Co., Ltd.Inventors: Norihito Yanagita, Katsutoshi Tsuchiya, Hiroshi Kitaguchi, Kensuke Amemiya, Yuichiro Ueno, Kazuma Yokoi, Ryuji Jinnai
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Publication number: 20090114826Abstract: A PET apparatus comprises a plurality of detector units in the circumferential direction, wherein the detector unit includes a plurality of unit substrates therein, and wherein the unit substrate includes: a plurality of detectors upon which a ?-ray is incident; and an analog ASIC and digital ASIC for processing a ?-ray detection signal outputted by each of the detectors. The analog ASIC includes two slow systems having mutually different time constants, each of which outputs a pulseheight value. A noise determination part of the digital ASIC determines whether a relevant detection signal is an intended ?-ray detection signal or a noise based on a correlation between the pulseheight values, and a noise counting part counts the number of times of noise determination, and a detector output signal processing control part controls the signal processing with respect to an output signal from a relevant detector based on the count.Type: ApplicationFiled: September 26, 2007Publication date: May 7, 2009Inventors: Isao Takahashi, Takafumi Ishitsu, Yuichiro Ueno, Tomoyuki Seino
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Publication number: 20090108208Abstract: There are provided a radiation detection module, a printed circuit board, and a radiological imaging apparatus which make it possible to enhance spatial resolution without increasing channel number, and thereby to perform high-accuracy diagnosis. The radiation detection module includes a plurality of radiation detectors, and a wiring board on which the plurality of radiation detectors are mounted in a manner of being arranged in at least a radiation traveling direction. Here, on the wiring board, a pair of the radiation detectors which are adjacent to each other in the radiation traveling direction are electrically connected to each other, thereby configuring one detector structure (i.e., detection channel). Moreover, the radiation detectors are mounted onto the wiring board such that respective connection parts of electrodes, which are to be electrically connected to each other, are in a mutually-facing state.Type: ApplicationFiled: September 8, 2006Publication date: April 30, 2009Inventors: Norihito Yanagita, Katsutoshi Tsuchiya, Hiroshi Kitaguchi, Kensuke Amemiya, Yuichiro Ueno, Kazuma Yokoi, Ryuji Jinnai
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Publication number: 20080210876Abstract: A nuclear medical diagnosis apparatus capable of attaining improvement of the sensitivity by the reduction of a count loss of the data is provided. A data sort section inside a data acquisition unit re-arranges and outputs the data packet from a plurality of auxiliary data acquisition unit in order of the detection time data. A coincidence detection section includes a pair check section and a pair generation section. The pair check section refers to a context on the data packet re-arranged in order of the detection time, and judges a pair relating to a coincidence counting. The pair generation section, based on this judgment result, merges the data packet used as a pair, and outputs the same to the collection work station.Type: ApplicationFiled: February 20, 2008Publication date: September 4, 2008Inventors: Takafumi ISHITSU, Yuichiro Ueno, Kensuke Amemiya, Keiji Kobashi
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Publication number: 20070111358Abstract: A nuclear medicine imaging system is configured so that a semiconductor element and a metallic conductive member are bonded to one another with an electrically conductive adhesive composed of electric conductive particles and a resin binder, and a charge which is generated when radiation is incident on the semiconductor element is taken as a signal by a detection circuit from the conductive member through the electrically conductive adhesive, and a current source unit for forcing a larger current than that due to a charge generated by incoming radiation to flow at least through the electrically conductive adhesive and a protection circuit for protecting the detection circuit from the larger current passed by the current source unit are provided.Type: ApplicationFiled: November 15, 2006Publication date: May 17, 2007Inventors: Tomoyuki Seino, Kazuma Yokoi, Isao Takahashi, Yuichiro Ueno