公开(公告)号：US20190209870A1

公开(公告)日：2019-07-11

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.

公开(公告)号：US20140079180A1

公开(公告)日：2014-03-20

申请号：US14018631

申请日：2013-09-05

申请人： Hitachi, Ltd.

发明人： Yasushi NAGUMO ,  Noriyuki SADAOKA

IPC分类号： G01N23/04

CPC分类号： G01N23/046 ,  G01N2223/419

摘要： An object of this invention is to provide a tomography method and a tomography system capable of tomographic imaging targeted uniquely to the test object among subjects under test. The method involves performing a process of generating projection data about the region of interest by selecting one reference projection data set from a plurality of projection data generated in a tomography process using a plurality of X-ray energy levels and by subtracting from the reference projection data set the product of an attenuation coefficient and the transmission length of the material configuring any region other than the region of interest detected by detector elements of detectors, and performing an image reconstruction computing process to generate a tomographic or stereoscopic image of the region of interest through image reconstruction based on the projection data about the region of interest generated in the projection data generating process.

摘要翻译： 本发明的一个目的是提供一种能够在被测试对象中独立地对待测试对象进行断层成像的层析成像方法和断层摄影系统。 该方法包括执行通过使用多个X射线能量级别从断层摄影处理中生成的多个投影数据中选择一个参考投影数据集并从参考投影数据中减去来产生关于感兴趣区域的投影数据的处理 设置衰减系数的乘积和构成由检测器的检测器元件检测到的感兴趣区域以外的任何区域的材料的传输长度，以及执行图像重建计算处理，以通过以下方式生成感兴趣区域的断层摄影或立体图像： 基于关于在投影数据生成处理中生成的感兴趣区域的投影数据的图像重建。

公开(公告)号：US20190204457A1

公开(公告)日：2019-07-04

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.

公开(公告)号：US20170062084A1

公开(公告)日：2017-03-02

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

CPC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.

摘要翻译： 本发明的一个目的是提供一种易于修理或更换的反应堆仪表系统。 本发明包括：设置在反应堆堆芯中的仪表管; 设在仪表管内的气流管; 用于向所述气体流动管道供应含氧气体的抽吸机构; 以及用于测量气体流管中的气体中的核素的核素分析装置。 根据本发明，可以提供可以容易地修理或更换的反应器仪表系统。

公开(公告)号：US20220035055A1

公开(公告)日：2022-02-03

申请号：US17276957

申请日：2019-08-02

申请人： HITACHI, LTD.

发明人： Takahiro TADOKORO ,  Yuichiro UENO ,  Katsunori UENO ,  Kouichi OKADA ,  Shuichi HATAKEYAMA ,  Yasushi NAGUMO ,  Tooru SHIBUTANI ,  Keisuke SASAKI ,  Akira OOZONE

IPC分类号： G01T1/20 ,  G01T3/06 ,  G01T1/208 ,  G01T1/202

摘要： A radiation monitor includes a radiation detection unit detecting radiation, and an optical fiber transmitting photons emitted from a light emitting element of the radiation detection unit, wherein the radiation detection unit includes a first light emitting element generating a photon in response to incident radiation, a chemical compound part having chemical compounds which generate charged particles by nuclear reactions with incident neutrons, and a second light emitting element being located between the first light emitting element and the chemical compound part and generating a photon in response to radiation.

公开(公告)号：US20190353804A1

公开(公告)日：2019-11-21

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

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.

公开(公告)号：US20140003573A1

公开(公告)日：2014-01-02

申请号：US13928162

申请日：2013-06-26

申请人： Hitachi, Ltd.

发明人： Noriyuki SADAOKA ,  Yasushi NAGUMO

IPC分类号： G01N23/04

CPC分类号： G01N23/046 ,  G01N2223/419

摘要： The invention relates to an X-ray CT system for measuring three-dimensional shapes, while the X-ray system is capable of extracting three-dimensional shape information with high accuracy in consideration of beam hardening depending on a material and thickness of a specimen. The X-ray CT system includes an optical distance meter and a CT image analyzing unit. The optical distance meter measures an outer shape of the specimen simultaneously with a measurement of projection data. The CT image analyzing unit calculates a boundary threshold for the specimen on the basis of a CT image and a measurement value of the outer shape.

摘要翻译： 本发明涉及一种用于测量三维形状的X射线CT系统，而X射线系统能够根据样本的材料和厚度考虑光束硬化而以高精度提取三维形状信息。 X射线CT系统包括光学距离计和CT图像分析单元。 光学距离计与投影数据的测量同时测量样本的外形。 CT图像分析单元基于CT图像和外部形状的测量值来计算样本的边界阈值。

公开(公告)号：US20200064495A1

公开(公告)日：2020-02-27

申请号：US16415052

申请日：2019-05-17

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

摘要： A radiation monitor according to the present invention includes: a radiation sensing unit which includes phosphors emitting a photon with respect to an incident radiation; and a photon sending unit which sends the photon emitted from the phosphors of the radiation sensing unit, wherein the phosphors form a multilayer structure including a first phosphor and a second phosphor, and a photon absorbing layer absorbing a photon emitted from a phosphor is provided between the first phosphor and the second phosphor.

公开(公告)号：US20190175950A1

公开(公告)日：2019-06-13

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 ,  G01T1/202

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.

公开(公告)号：US20190018148A1

公开(公告)日：2019-01-17

申请号：US16063707

申请日：2016-03-16

申请人： HITACHI, LTD.

发明人： Yuichiro UENO ,  Takahiro TADOKORO ,  Yasushi NAGUMO ,  Shuichi HATAKEYAMA ,  Kouichi OKADA

IPC分类号： G01T1/02 ,  G01T1/20 ,  A61N5/10

摘要： The dose measurement device includes: a radiation sensor constituted by a light emitting portion that is made of a polycrystalline scintillator and emits light of intensity dependent on an amount of incident radiation and a cover covering the light emitting portion; an optical fiber that is connected to the radiation sensor and transmits the photons emitted by the polycrystalline scintillator; a photoelectric converter for converting the photons transmitted by the optical fiber into electrical signals; a calculation device for measuring each of the electrical signals through the conversion by the photoelectric converter of each photon, calculating a count rate, and specifying a dose rate; and a display device for displaying measurement results calculated by the calculation device.