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1. 发明专利

JP2589613B2 失效
公开(公告)号：JP2589613B2
公开(公告)日：1997-03-12
申请号：JP26522791
申请日：1991-09-17
申请人： HITACHI LTD
发明人： SATO KATSUTOSHI , IZUMI SHIGERU , KAMATA SHOJI , MYAI YASUSHI , KITAGUCHI HIROSHI , KONDO MASAHIRO , WATABIKI MASAYUKI
IPC分类号： A61B6/03 , G01N23/04 , G06Q50/22 , G06Q50/24 , G06T1/00 , G06T11/00 , G16H10/60 , G06F19/00

2. 发明专利

JPH0688873A METHOD AND DEVICE FOR EVALUATING DISTRIBUTION OF RADIATION DOSAGE RATE 失效
公开(公告)号：JPH0688873A
公开(公告)日：1994-03-29
申请号：JP23846392
申请日：1992-09-07
申请人： HITACHI LTD
发明人： KONDO MASAHIRO , IZUMIDA TATSUO
IPC分类号： G01T1/16 , G01T1/169 , G01T7/00 , G21F9/30
摘要： PURPOSE:To quickly measure and evaluate the distribution of radiation dosage rates in a working space which is in a radiation environment and in which a radiation source changes. CONSTITUTION:By installing radiation detectors 2 around equipment 7 which is a radiation source, the radiation distribution caused by the equipment 7 is measured with the detectors 2. The radiation distribution and the data regarding the structure, material, etc., of the detectors 2 installed to the location for evaluating the distribution of radiation dosage rates are read out from a storage device 5 and, even when the constitution of the equipment 7 changes due to demolition, etc., a signal processor 4 calculates and evaluates the distribution of radiation dosage rates and outputs the calculated and evaluates results through an output device 6 in the form of an output diagram 601. Therefore, the distribution of radiation dosage rates can be evaluated with high accuracy, since the configuration in the working space can be taken into account at the time of measuring and evaluating the radiation.

3. 发明专利

JPH0574794B2 失效
公开(公告)号：JPH0574794B2
公开(公告)日：1993-10-19
申请号：JP4481885
申请日：1985-03-08
申请人： HITACHI LTD
发明人： KAWASAKI SATOSHI , KITAGUCHI HIROSHI , SAKAGAMI MASAHARU , KONDO MASAHIRO
IPC分类号： G01N23/04 , G01T1/167 , G01T1/29

4. 发明专利

JPH04194772A RADIATION MEASURING DEVICE 失效
公开(公告)号：JPH04194772A
公开(公告)日：1992-07-14
申请号：JP32291490
申请日：1990-11-28
申请人： HITACHI LTD
发明人： KONDO MASAHIRO , IZUMIDA TATSUO
IPC分类号： G01T1/167 , G01T1/169
摘要： PURPOSE:To determine the radioactivity within a storage drum can with one radiation detecting system by measuring the energy spectra of radioactive rays incedent through a collimator of the front of a radiation detector from an inspected object with a signal processor. CONSTITUTION:gamma-rays emitted from within a drum can 1 are measured by a radiation detector 2. Here, the output of the detector 2 becomes signals amplified by a preamplifier 6 and the signals are input to a linear amplifier 7. Next, the signals are made the waveform-shaping and amplified by the amplifier 7, the signals suited for the gamma-ray energy spectrum measurement are obtained, the signals are input to a multichannel analyzer 8, and the energy spectra caused by the gamma-rays emitted from within the drum can 1 and passing through here, are here found at every section of the drum can. Then, dead time signals of the analyzer 8 are input to a multichannel scanning device 9, the rotational position informations of the drum can 1 are found in an encoder 11, and the dead time of the analyzer 8 is measured in the device 9. The weight of the drum can 1 is measured by a gravimeter 10.

5. 发明专利

JPH01257292A RADIOACTIVITY MEASUREMENT METHOD AND ITS DEVICE 失效
公开(公告)号：JPH01257292A
公开(公告)日：1989-10-13
申请号：JP32335088
申请日：1988-12-23
申请人： HITACHI LTD
发明人： KAWASAKI SATOSHI , KONDO MASAHIRO
IPC分类号： G01N23/10 , G01T1/167
摘要： PURPOSE:To make quantitative determination of radioactivity of a storage vessel by the first radioactivity measurement per cross section by finding an energy spectrum of radiation from an inspected object which is made incident through a collimator set at the front of a radiation detector. CONSTITUTION:In order to find the radiation of gamma ray release nuclide of the inside of a drum can from gamma ray strength measured in the circumfer ence of the drum can, measured gamma ray strength is corrected on the basis of the detected efficiency of a measuring system dependent on radioactivity distribution and the density distribution of the content of the drum can. The setting of the measuring system composed of the drum can 1, collimaters 4, 5 and a radiation detector 2 is performed at least once before a series of the radiation of the drum can are determined. The correction of radioactivity distri bution in the major axis direction of the drum can and density distribution of contents thereof sets the opening width of the vertical collimator 4 so that a detector 2 anticipates only a cross section in the major axis direction of the drum can and the whole cross section of the drum can 1 can be measured as the drum can 1 is ascended or decreased in the major axis direction of the drum can.

6. 发明专利

JPS6423189A INSPECTING DEVICE FOR SURFACE RADIOACTIVE CONTAMINATION 失效
公开(公告)号：JPS6423189A
公开(公告)日：1989-01-25
申请号：JP17892287
申请日：1987-07-20
申请人： HITACHI LTD
发明人： KONDO MASAHIRO , IZUMI SHIGERU , KITAGUCHI HIROSHI , KAWASAKI SATOSHI
IPC分类号： G01T1/169
摘要： PURPOSE:To shorten a measurement and processing time and to facilitate storage control over measurement data by sampling a radioactive material sticking on the surface of a body to be inspected and measuring the radioactivity of the sampled material continuously, and storing the measurement data in a storage element. CONSTITUTION:When a radioactive contaminated material sampling member 4 drawn out by a take-up device 5 reaches a contaminated material sampling place, an extender 6 extends to press a sampling member compressor 9. The member 4 coated with a cohesive material samples a radioactive material sticking on the surface of the body 1 to be inspected. Then the take-up device 5 stops when the member 4 comes to in front of a small-sized semiconductor detector 7, and then the radiation of the radioactive material is measured by the detector 7. The output of the detector 7 is amplified and waveform-shaped by a linear amplifier put hermetically in a radiation measuring circuit 8 and a trailing-stage counter to which only a radiation signal larger than a desired crest value is sent through a discriminator counts the radiation signal and transfers the result to a computing element 10. The computing element 10 performs specific arithmetic and stores the radiation intensity measurement result on, for example, an IC card 12 in a storage driving device 11.

7. 发明专利

JPH08327525A COMPOSITION ANALYSIS METHOD FOR OBJECT AND DEVICE THEREFOR 失效
公开(公告)号：JPH08327525A
公开(公告)日：1996-12-13
申请号：JP13403395
申请日：1995-05-31
申请人： HITACHI LTD
发明人： SATO KATSUTOSHI , KAWASAKI SATOSHI , KONDO MASAHIRO
IPC分类号： G01N9/24 , G01N23/04 , G06T1/00 , G06T7/00
摘要： PURPOSE: To easily analyze the composition of an object on the basis of a CT image by processing data available from the irradiation with an X-ray for reconstituting an image, obtaining a line absorption coefficient for every picture element, multiplying a volume element by the volume size of one volume element for obtaining a density spectrum for the change of a density parameter. CONSTITUTION: A signal detected with an array detector 2, after amplified with a signal processing circuit 7, is A/D converted and stored in a memory 8. A parameter regarding the photographing condition of a specimen 3, a parameter regarding the detector 2 and the like are sent to a control device 10 via an input device 11, and stored in the memory 8. Once an output signal from the detector 2 is stored in the memory 8, an arithmetic operation device 9 performs a calculation for reconstituting an image, according to an instruction from the device 10. The device 9 performs a process for converting a line absorption coefficient into density, and obtains the volume of the cross section of the specimen 3 corresponding to the pixel of a CT tomography. In addition, the device 9 prepares a density spectrum, and analyzes the composition of an object referring to the spectrum.

8. 发明专利

JPH0711573B2 失效
公开(公告)号：JPH0711573B2
公开(公告)日：1995-02-08
申请号：JP32335088
申请日：1988-12-23
申请人： HITACHI LTD
发明人： KAWASAKI SATOSHI , KONDO MASAHIRO
IPC分类号： G01N23/10 , G01T1/167

9. 发明专利

JPH0390134A X-RAY CT DEVICE 失效
公开(公告)号：JPH0390134A
公开(公告)日：1991-04-16
申请号：JP22444089
申请日：1989-09-01
申请人： HITACHI LTD
发明人： KAMATA SHOJI , IZUMI SHIGERU , KONDO MASAHIRO
IPC分类号： A61B6/03
摘要： PURPOSE:To improve radiation measuring accuracy of an X-ray CT detector by providing a plurality of X-ray detectors with at least one detector formed into structure shielded for X-rays. CONSTITUTION:An accelerated electron by an accelerator 1 collides against a target 2, and an X-ray beam 12 is irradiated from the target 2. A sample 14 is placed on a CT scanner 4 and translation rotation-scanned, and permeability of an X-ray is measured from all the directions by a detector arranged behind a collimator 5. The detector is such that solid or liquid scintillator 6 is combined with a photomultiplier or photoelectric transfer element 7, and its output is input to an AD converter 9 through an amplifier 8 and fetched to a computer 10. Of the detectors, the one is shielded for the X-rays to serve as a base line monitor 13. In the base line monitor 13, a fluctuation amount, in which a base line of a detector output essentially being 0, when radiation is not incident upon the detector, is changed by fluctuation and electromagnetic noise or the like of a power supply and the base line caused by a high voltage power supply 3 or the like of the accelerator 1, is measured.

10. 发明专利

JPS6465478A METHOD FOR MEASURING RADIOACTIVITY QUANTITY IN RADIOACTIVE WATER CONTAINER 失效
公开(公告)号：JPS6465478A
公开(公告)日：1989-03-10
申请号：JP22324787
申请日：1987-09-07
申请人： HITACHI LTD
发明人： KAWASAKI SATOSHI , IZUMI SHIGERU , KONDO MASAHIRO , KANAMORI TAKAHIRO
IPC分类号： G01N23/06 , G01T1/167
摘要： PURPOSE:To shorten the time for measurement by impulsively executing the release of radiations from an external radiation source, measuring the radiations released from the inside of a vessel by a piece-by-piece pulse mode and measuring the radiations transmitted through the vessel from the gross integrated quantity by current mode. CONSTITUTION:The external X-rays 2a transmitted through the waste vessel 1 and the internal X-rays 2b radiated from the inside of the vessel 1 are converted 20 to light. The signal occurring in the X-rays 2a is sent via a photo multiplier 21 and selection switches 22a, 22b to a pulse height detector 60 by the current mode. The output signal occurring in an amplifier 50 is passed through a linear amplifier 51 and a multiple pulse height analyzer 52 and the intensity thereof is determined by nuclides in an internal radiation evaluating device 53. The intensity is sent to a radioactivity quantity evaluating device 100. On the other hand, the output of the detector 60 is subjected to A/D conversion 61 and the coefft. of radiation absorption is determined in an external radiation evaluating device 62 and is sent to the device 100. The distribution of the coefft. of radiation absorption in the vessel 1 is calculated in accordance with the output of the device 62 in the device 100. The radioactivity quantity of respective nuclides in the vessel is calculated from the result thereof and the output of the device 53.

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