-
公开(公告)号：US20220199277A1
公开(公告)日：2022-06-23
申请号：US17601467
申请日：2020-02-12
Applicant: Hitachi, Ltd.
Inventor： Takahiro TADOKORO , Yuichiro UENO , Yuuko KANI
Abstract: An object of the invention is to efficiently produce a radionuclide. While a fluid containing a raw material is circulated along a circulation passage, a first radionuclide is generated in the fluid from the raw material by irradiating the fluid with radiation rays midway along the circulation passage. Further, while the fluid is circulated along the circulation passage, a substance containing at least a part of the first radionuclide and a second radionuclide generated from the first radionuclide is taken out from the fluid, and the fluid containing the remaining raw material is returned to the circulation passage again for circulation.
-
公开(公告)号：US20190209870A1
公开(公告)日：2019-07-11
申请号：US16304701
申请日：2017-03-03
Applicant: Hitachi, Ltd.
Inventor： Yuichiro UENO , Takahiro TADOKORO , Yasushi NAGUMO , Katsunori UENO , Kouichi OKADA , Shuichi HATAKEYAMA
Abstract: 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.
-
3.发明申请公开(公告)号：US20170276808A1
公开(公告)日：2017-09-28
申请号：US15518575
申请日：2015-06-18
Applicant: HITACHI, LTD.
Inventor： Isao TAKAHASHI , Kazuma YOKOI , Eiji MORO , Yuichiro UENO , Yasutaka KONNO , Fumito WATANABE , Shinichi KOJIMA
IPC: G01T1/29 , H01L31/115 , H01L27/146 , G01T1/161 , G01T1/20
CPC classification number: G01T1/2985 , A61B6/032 , A61B6/4208 , G01T1/161 , G01T1/17 , G01T1/2018 , H01L27/14658 , H01L31/115
Abstract: A flat pixel (20) is a single unit composing a radiation detector and is configured so as to be divided into at least four subpixels (21) such that even if a prescribed number of subpixels (21) are removed from each pixel (20) in order of largest effective area, the centroid (51) of the effective area of the entirety of the remaining subpixels (21) is positioned within a similar-shape region (30) having the same centroid (50) as the pixel (20) and having sides of lengths that are half those of the pixel (20).
-
公开(公告)号：US20220236430A1
公开(公告)日：2022-07-28
申请号：US17614410
申请日：2020-05-18
Applicant: HITACHI, LTD.
Inventor： Shuichi HATAKEYAMA , Kouichi OKADA , Katsunori UENO , Takahiro TADOKORO , Yuichiro UENO , Tooru SHIBUTANI , Keisuke SASAKI
Abstract: A radiation monitoring device realizes a high measurement function. Therefore, a radiation monitoring device includes: a radiation detection unit including a phosphor that emits light by incident radiation; a photodetector that converts a single photon or a photon group having a plurality of the single photons generated by the radiation detection unit into an electric pulse signal; and an analysis unit that analyzes the electric pulse signal. The phosphor emits light based on a plurality of light emission phenomena having different decay time constants. The analysis unit includes: a signal discrimination circuit that discriminates the electric pulse signal output from the photodetector; a dose rate calculation circuit that calculates a dose rate of the radiation based on a count rate of the discriminated electric pulse signal; and an application energy calculation circuit that calculates application energy of the radiation based on a peak value of the discriminated electric pulse signal.
-
公开(公告)号：US20190204457A1
公开(公告)日：2019-07-04
申请号：US16325735
申请日：2017-08-08
Applicant: HITACHI, LTD.
Inventor： Takahiro TADOKORO , Katsunori UENO , Yuichiro UENO , Kouichi OKADA , Shuichi HATAKEYAMA , Yasushi NAGUMO , Yoshinobu SAKAKIBARA , Toru SHIBUTANI , Takahiro ITOU
CPC classification number: G01T1/208 , G01T1/20 , G01T1/2002
Abstract: 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.
-
Patent Agency Ranking
公开(公告)号：US20230056147A1
公开(公告)日：2023-02-23
申请号：US17797143
申请日：2020-08-25
Applicant: HITACHI, LTD.
Inventor： Kota SASAKI , Kouichi OKADA , Yuichiro UENO
IPC: A61N5/10
Abstract: An object of the present invention is to increase sensitivity and position resolution of measurement of an arrival position of a charged particle beam irradiated during treatment. A beam monitoring system includes: a gamma ray detector that detects gamma rays generated by interaction between a charged particle beam and an irradiation target; a shield that is disposed between the gamma ray detector and an irradiation axis of the beam and has a plurality of slits; and a calculation unit that analyzes a detection result of the gamma ray detector and reconfigures a count distribution of the detected gamma rays into a distribution of the beam irradiation axis based on a geometric arrangement of the shield, the detector, and the irradiation axis of the beam. The calculation unit obtains the arrival position of the particle beam from the reconfigured distribution.
-
公开(公告)号：US20220208409A1
公开(公告)日：2022-06-30
申请号：US17611296
申请日：2020-03-02
Applicant: HITACHI, LTD.
Inventor： Yuuko KANI , Takahiro TADOKORO , Yuichiro UENO
Abstract: A radionuclide production method and system makes it possible to separate a target radionuclide generated by irradiation with a radioactive ray, and to reduce the generation of a radioactive waste along with the separation. The radionuclide production method includes irradiating, with a radioactive ray, a target material in which a starting material nuclide is present, to generate a radionuclide; and eluting the radionuclide into a liquid by bringing the target material into contact with the liquid. The radionuclide production system includes a target material having a starting material nuclide; an irradiation unit for the target material that generates a radionuclide; and an elution unit that elutes the radionuclide into a liquid by bringing the target material into contact with the liquid. For both the radionuclide production method and system, the target material is a porous body or a granular material through which the liquid is passable.
-
公开(公告)号：US20220035055A1
公开(公告)日：2022-02-03
申请号：US17276957
申请日：2019-08-02
Applicant: HITACHI, LTD.
Inventor： Takahiro TADOKORO , Yuichiro UENO , Katsunori UENO , Kouichi OKADA , Shuichi HATAKEYAMA , Yasushi NAGUMO , Tooru SHIBUTANI , Keisuke SASAKI , Akira OOZONE
Abstract: 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
Applicant: HITACHI, LTD.
Inventor： Shuichi HATAKEYAMA , Takahiro TADOKORO , Yuichiro UENO , Yasushi NAGUMO , Katsunori UENO , Kouichi OKADA
IPC: G01T1/20
Abstract: 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：US20240153663A1
公开(公告)日：2024-05-09
申请号：US18280279
申请日：2022-03-17
Applicant: HITACHI, LTD.
Inventor： Takahiro TADOKORO , Yuichiro UENO , Yuuko KANI , Kento NISHIDA , Takahiro WATANABE , Takahiro SASAKI , Masaharu ITO
IPC: G21G1/12
CPC classification number: G21G1/12
Abstract: A radionuclide production system is a system for producing a radionuclide by irradiating a liquid containing a raw material nuclide with bremsstrahlung radiation, the radionuclide production system including: a circulation path configured to allow a liquid containing a raw material nuclide to circulate; and a radiation generation unit configured to generate bremsstrahlung radiation to irradiate the liquid. A metal member containing a pure metal of a platinum group or an alloy of the platinum group is provided at an upper portion in the circulation path. In a radionuclide production method, the raw material nuclide contained in the liquid is transformed to the radionuclide by irradiating the liquid with the bremsstrahlung radiation while circulating the liquid containing the raw material nuclide in the circulation path, and oxygen and hydrogen generated due to radiolysis of the liquid are removed by a recombination reaction with a metal member formed of the pure metal.
-
-
-
-
-
-
-
-
-
Search Results
18
records
(took 0.016 seconds)
