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1. 发明授权

US11231507B2 Radiation monitor 有权
公开(公告)号：US11231507B2
公开(公告)日：2022-01-25
申请号：US17059535
申请日：2019-05-16
申请人： HITACHI, LTD.
发明人： Shuichi Hatakeyama , Takahiro Tadokoro , Yuichiro Ueno , Yasushi Nagumo , Katsunori Ueno , Kouichi Okada
IPC分类号： G01T1/10 , G01T1/17 , G01T1/02 , G01T1/20
摘要： A screw compressor includes a screw rotor, a casing, and a fluid supply portion to supply fluid in a membrane form into a compression chamber in the casing. The screw rotor has a male and female rotors. A male bore covering the male rotor and a female bore covering the female rotor are formed on the inner surface of the casing. An intersection line, on a higher pressure side, of the male and female bores is defined as a compression cusp. In a bore development view, a trajectory made by the first intersection of an extension line of a female lobe ridge and a male lobe ridge being moved, along with the rotation of the male and female rotors, is defined as a trajectory line. An opening of the fluid supply section to the compression chamber is positioned between the compression cusp and the trajectory line.

2. 发明授权

US10967201B2 Radiation monitor and method of monitoring radiation 有权
公开(公告)号：US10967201B2
公开(公告)日：2021-04-06
申请号：US16340696
申请日：2017-12-15
申请人： HITACHI, LTD.
发明人： Yuichiro Ueno , Takahiro Tadokoro , Yasushi Nagumo , Shuichi Hatakeyama , Katsunori Ueno , Kouichi Okada
IPC分类号： H01S3/0955 , G01T1/20 , A61N5/10 , H01S3/16
摘要： A radiation monitor 1 includes a light-emitting unit 10 which generates light having an intensity depending on an amount of an incident radiation, an optical fiber 20 which sends a photon generated by the light-emitting unit 10, a photoelectric converter 30 which transmits one electric pulse to one sent photon, a dose calculation device 40 which counts the electric pulse amplified by the photoelectric converter 30 and converts the counted value of the measured electric pulses into a dose of the radiation, and a display device 50. The dose calculation device 40 counts the electric signals converted from the photon by the photoelectric converter 30 to calculate a counting rate, and stops the counting when the counting rate exceeds a predetermined threshold, and performs counting when the counting rate is less than the threshold.

3. 发明授权

US10751553B2 Radiation therapy apparatus 有权
公开(公告)号：US10751553B2
公开(公告)日：2020-08-25
申请号：US16304701
申请日：2017-03-03
申请人： Hitachi, Ltd.
发明人： Yuichiro Ueno , Takahiro Tadokoro , Yasushi Nagumo , Katsunori Ueno , Kouichi Okada , Shuichi Hatakeyama
IPC分类号： A61N5/10 , A61B6/00
摘要： A radiation therapy apparatus capable of improving the accuracy of a dose distribution includes an X-ray generation device that is provided at an arm portion of a rotation gantry, a radiation detector that is insertable into the body of a patient, a dose calculation device, and a feedback control device. An X-ray generated due to collision of an electron beam with a target in the X-ray generation device is applied to an affected part (cancer) of a patient on a bed. The radiation detector which is insertable into the body detects the X-ray applied to the affected part so as to output a photon to obtain a dose rate and a dose based thereon. The feedback control device either controls the X-ray generation device such that the obtained dose becomes a set dose or controls the radiation generation device such that the obtained dose rate becomes a set dose rate.

4. 发明授权

US11131779B2 Radiation monitor 有权
公开(公告)号：US11131779B2
公开(公告)日：2021-09-28
申请号：US16474111
申请日：2018-01-30
申请人： HITACHI, LTD.
发明人： Shuichi Hatakeyama , Takahiro Tadokoro , Yuichiro Ueno , Yasushi Nagumo , Katsunori Ueno , Kouichi Okada
IPC分类号： G01T1/20 , C09K11/77 , G01T1/202
摘要： The present invention includes: a radiation detecting unit including a fluorescent body expressed by the formula ATaO4: B, C (in the formula, A is selected from at least one kind of element from among rare-earth elements involving 4f-4f transitions, B is selected from at least one kind of element, different from A, from among rare-earth elements involving 4f-4f transitions, and C is selected from at least one kind of element from among rare-earth elements involving 5d-4f transitions); an optical fiber that transmits photons generated by the fluorescent body; a light detector that converts the photons transmitted via the optical fiber 3 one by one into electrical pulse signals; a counter that counts the number of electrical pulse signals converted by the light detector; an analysis and display device 6 that obtains a radiation dose rate on the basis of the number of electrical pulse signals counted by the counter.

5. 发明授权

US10877167B2 Radiation monitor and method of analyzing radiation monitor 有权
公开(公告)号：US10877167B2
公开(公告)日：2020-12-29
申请号：US16325735
申请日：2017-08-08
申请人： HITACHI, LTD.
发明人： Takahiro Tadokoro , Katsunori Ueno , Yuichiro Ueno , Kouichi Okada , Shuichi Hatakeyama , Yasushi Nagumo , Yoshinobu Sakakibara , Toru Shibutani , Takahiro Itou
IPC分类号： G01T1/208 , G01T1/20
CPC分类号： G01T1/208 , G01T1/20 , G01T1/2002
摘要： Provided is a radiation monitor, including: a radiation detection unit which includes a radiation detection element, the radiation detection element emitting light of a predetermined light emission wavelength; a light emission unit which emits light of a wavelength different from the light emission wavelength; a wavelength selection unit which passes the light of the light emission wavelength, and is set to a first mode to block the light from the light emission unit; an optical transmission line which transmits the light; a light detection unit which converts the light passing through the wavelength selection unit into an electric pulse; and a control unit which measures a count rate of the electric pulse, and determines whether at least the light emission unit is degraded on the basis of the count rate and a light intensity of the light emission unit.

6. 发明授权

US10224122B2 Reactor instrumentation system and reactor 有权
公开(公告)号：US10224122B2
公开(公告)日：2019-03-05
申请号：US15153896
申请日：2016-05-13
申请人： Hitachi, Ltd.
发明人： Kouichi Okada , Takahiro Tadokoro , Katsunori Ueno , Yasushi Nagumo
IPC分类号： G21C17/108 , G21C19/28
摘要： An object of the invention is to provide a reactor instrumentation system that can be easily repaired or replaced. The invention includes: an instrumentation tube provided in a reactor core; a gas flow pipe provided in the instrumentation tube; a suction mechanism for supplying gas containing oxygen to the gas flow pipe; and a nuclide analysis device for measuring a nuclide in the gas in the gas flow pipe. According to the invention, it is possible to provide a reactor instrumentation system that can be easily repaired or replaced.

7. 发明申请

US20150123002A1 DOSAGE RATE MEASUREMENT SYSTEM AND DOSAGE RATE MEASUREMENT METHOD 有权
标题翻译：剂量测量系统和剂量测量方法
公开(公告)号：US20150123002A1
公开(公告)日：2015-05-07
申请号：US14367942
申请日：2012-12-03
申请人： HITACHI, LTD.
发明人： Katsunori Ueno , Hiroshi Kitaguchi , Takahiro Tadokoro , Akihisa Kaihara , Koichi Okada , Yoshinobu Sakakibara , Yuta Inamura , Hitoshi Kuwabara
IPC分类号： G01T1/10
CPC分类号： G01T1/10 , G01T1/105
摘要： Provided is a measurement unit and measurement method for reducing attenuation due to optical fiber length and SN degradation due to background in a dosage rate monitor that uses optical fiber. This system comprises: a radiation detector for detecting radiation dosage; a light source for irradiating stimulating light on the radiation detector; a photodetector for detecting light generated by the radiation detector; an optical fiber for connecting the photodetector and the radiation detector and light source, and transmitting light from the light source and light from the radiation detector; a measurement unit for counting the pulses outputted from the photodetector; and an analysis unit for extracting the luminous energy originating from the radiation detector, from time information, wave height information, and the count value, which are measurement results obtained by the measurement unit, and converting the luminous energy to a dosage and dosage rate.
摘要翻译：提供了一种测量单元和测量方法，用于减少由于使用光纤的剂量率监视器中的背景导致的光纤长度和SN劣化引起的衰减。该系统包括：用于检测辐射剂量的放射线检测器; 用于在辐射检测器上照射刺激光的光源; 用于检测由所述辐射检测器产生的光的光检测器; 用于连接光电检测器和辐射检测器和光源的光纤，以及来自光源的光和来自辐射检测器的光; 测量单元，用于对从光电检测器输出的脉冲进行计数; 以及分析单元，用于从作为测量单元获得的测量结果的时间信息，波高信息和计数值中提取源自辐射检测器的发光能量，并将发光能量转换成剂量和剂量率。

8. 发明授权

US11536858B2 Radiation monitor and radiation measurement method 有权
公开(公告)号：US11536858B2
公开(公告)日：2022-12-27
申请号：US16645513
申请日：2018-08-30
申请人： HITACHI, LTD.
发明人： Takahiro Tadokoro , Yuichiro Ueno , Katsunori Ueno , Kouichi Okada , Shuichi Hatakeyama , Yasushi Nagumo , Takahiro Itou , Yoshinobu Sakakibara
IPC分类号： G01T1/20 , G01T1/02
摘要： Provided is a radiation monitor and the like capable of appropriately measuring radiation. A radiation monitor (100) includes: radiation detection units (11, 12); optical fibers (13p, 13q) that transmit light generated by a plurality of radiation detection elements (11a, 12a) to merge; a light detection unit (14) that converts the light after merging guided to the light detection unit into an electric pulse; a measurement device (15) that calculates a dose rate of radiation based on a count rate of the electric pulses; and an analysis/display device (16). Housings (11b, 12b) include a housing (11b) made of a first material and another housing (12b) made of a second material.

9. 发明授权

US10722734B2 X-ray energy distribution measurement apparatus and X-ray therapy apparatus 有权
公开(公告)号：US10722734B2
公开(公告)日：2020-07-28
申请号：US16307500
申请日：2016-06-28
申请人： Hitachi, Ltd.
发明人： Yasushi Nagumo , Takahiro Tadokoro , Yuichiro Ueno , Katsunori Ueno , Kouichi Okada , Shuichi Hatakeyama
IPC分类号： A61N5/10 , G01T1/20 , G01T1/202
摘要： The radiation detection device includes a plurality of radiation detectors arranged in a row and is inserted into the body of patient subjected to the X-ray therapy. An X-ray detection signal (photon) is output from each of the radiation detectors that detects the X-ray applied to the patient. The dose rate measurement device separately connected to each of the radiation detectors obtains the dos rate at the position of each radiation detector based on the signals. The irradiation direction determination device determines whether the row of radiation detectors matches the irradiation direction of the X-ray using the dos rate obtained by each of the dose rate measurement devices. When the row of radiation detectors matches the irradiation direction, the energy distribution analysis device obtains an energy distribution using the dose rate at the positions of the radiation detectors by applying, for example, an inverse problem analysis called an unfolding method.

10. 发明授权

US09274233B2 Dosage rate measurement system and dosage rate measurement method 有权
标题翻译：剂量率测量系统和剂量率测量方法
公开(公告)号：US09274233B2
公开(公告)日：2016-03-01
申请号：US14367942
申请日：2012-12-03
申请人： HITACHI, LTD.
发明人： Katsunori Ueno , Hiroshi Kitaguchi , Takahiro Tadokoro , Akihisa Kaihara , Koichi Okada , Yoshinobu Sakakibara , Yuta Inamura , Hitoshi Kuwabara
IPC分类号： G01T1/20 , G01T1/10 , G01T1/105
CPC分类号： G01T1/10 , G01T1/105
摘要： Provided is a measurement unit and measurement method for reducing attenuation due to optical fiber length and SN degradation due to background in a dosage rate monitor that uses optical fiber. This system comprises: a radiation detector for detecting radiation dosage; a light source for irradiating stimulating light on the radiation detector; a photodetector for detecting light generated by the radiation detector; an optical fiber for connecting the photodetector and the radiation detector and light source, and transmitting light from the light source and light from the radiation detector; a measurement unit for counting the pulses outputted from the photodetector; and an analysis unit for extracting the luminous energy originating from the radiation detector, from time information, wave height information, and the count value, which are measurement results obtained by the measurement unit, and converting the luminous energy to a dosage and dosage rate.
摘要翻译：提供了一种测量单元和测量方法，用于减少由于使用光纤的剂量率监视器中的背景导致的光纤长度和SN劣化引起的衰减。该系统包括：用于检测辐射剂量的放射线检测器; 用于在辐射检测器上照射刺激光的光源; 用于检测由所述辐射检测器产生的光的光检测器; 用于连接光电检测器和辐射检测器和光源的光纤，以及来自光源的光和来自辐射检测器的光; 测量单元，用于对从光电检测器输出的脉冲进行计数; 以及分析单元，用于从作为测量单元获得的测量结果的时间信息，波高信息和计数值中提取源自辐射检测器的发光能量，并将发光能量转换成剂量和剂量率。

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