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    • 1. 发明专利
    • X-RAY TRANSMISSION AND IMAGE PICKUP DEVICE
    • JPH0823477A
    • 1996-01-23
    • JP15407494
    • 1994-07-06
    • HITACHI MEDICAL CORP
    • KAJIYAMA TOMOHARUUEDA TAKESHIONODERA YOICHIUMETANI KEIJIYOKOUCHI HISATAKE
    • H05G1/64A61B6/00H04N5/321
    • PURPOSE:To arbitrarily and easily set an optimum dynamic range by storing image output characteristics for the incident light quantity of an X-ray TV camera for respective operation modes with a multiplication factor as a parameter and deciding the multiplication factor and an optical diaphragm value in a control means through the use of a storage content. CONSTITUTION:The image output characteristics for the incident light quantity of the X-ray TV camera are stored for the respective operation modes which are set by the number of scanning lines and the number of scanning lines per second with the multiplication factor as the parameter in a characteristic storage medium 9. At the time of photographing, a photographing controller 1 reads the stored value from the storage medium 9 and sets the multiplication factor of an avalanche multiplication- type image pickup tube 4 and the optimum value of an optical diaphragm 5 in accordance with a scanning mode. X-rays projected from an X-ray generation device 2 pass through a subject and are made incident on the X-ray fluorescent multiplier tube 4 through an X-ray grid 3. Fluorescence projected from the multiplier tube 4 is made incident on the TV camera 6 through the diaphragm and a lens system 5. The output signal is image-processed by an image collection/processing device 7, and the image is displayed on an image display device 8.
    • 4. 发明专利
    • X-RAY PHOTOGRAPHING DEVICE
    • JPH06181540A
    • 1994-06-28
    • JP33423692
    • 1992-12-15
    • HITACHI MEDICAL CORP
    • FUJIMOTO KOJIONODERA YOICHIUEDA TAKESHIYOKOUCHI HISATAKE
    • A61B6/00H04N5/321
    • PURPOSE:To maintain high picture quality and to prevent an inspection time from being extended by preparing alignment adjusting mechanisms corresponding to modes for the numbers of reading electron beam scanning lines for an image pickup tube and scanning direction modes having respectively different polarity. CONSTITUTION:A control panel 301 specifies vertical and horizontal polarity and the number of beam scanning lines. A corresponding value is selected out of horizontal and vertical alignment voltage values to be impressed to previously set alignment coils and D/A converted and the converted value is sent to voltage setting circuits 101, 201. At the time of shipping this X-ray photographing device from a plant, four kinds of scanning directions and the numbers of scanning lines are prepared by alignment adjustment and corresponding voltage values are stored in a ROM built in a selection circuit 302 and a focus, beam scanning angle, etc., are adjusted. Since plural modes corresponding to beam scanning directions and the numbers of scanning lines are prepared, always fine pictures can be obtained even when respective modes are changed in accordance with using procedure, a focus deviation is not generated and the operation of the device can be simplified.
    • 5. 发明专利
    • JPH05249355A
    • 1993-09-28
    • JP4675192
    • 1992-03-04
    • HITACHI MEDICAL CORP
    • ONODERA YOICHIYOKOUCHI HISATAKE
    • G02B7/00
    • PURPOSE:To provide a filter attaching/detaching device in which plural filters can be simultaneously attached/detached on the optical axis of an optical system by simple operation, working effectiveness is improved, and also whose miniaturization can be realized. CONSTITUTION:This device is provided with a filter holding means, and a rotary shaft 3 which is different from the optical axis and in parallel with the optical axis, and the filter holding means is linked with the periphery of the rotary shaft 3 in a state where it can rotate and move in a shaft direction, the filter is attached/detached on the optical axis by the rotation of the filter holding means on the periphery of the rotary shaft, and the attaching position of the filter on the optical axis is decided by the moving of the filter holding means in the shaft direction.
    • 8. 发明专利
    • ROENTGENOGRAPHIC DIAGNOSING DEVICE
    • JPH01204041A
    • 1989-08-16
    • JP2750888
    • 1988-02-10
    • HITACHI MEDICAL CORP
    • FUNO TAKAKAZUYOKOUCHI HISATAKE
    • G03B42/02A61B6/00G06Q50/22G06Q50/24G16H10/60
    • PURPOSE:To accurately reproduce the image of roentgenoscopy because a roentgenoparent image is effectively stored and kept with a roentgenographic image by recording and displaying the roentgenoparent image with the roentgenographic image. CONSTITUTION:Usually, the roentgenoparent image is used for monitoring and continuously recorded in a digital VTR 10. At the time of generating the roentgenographic image, said image is recorded in the VTR 10 instead of the roentgenoparent image in the same system as a moving picture after performing buffering and dividing into blocks by an input image buffer 8 in order to adjust the roentgenographic image to the recording system of the VTR 10. At such a time, an identification code is added with a retrieval ID. At the time of reproducing the image, a reproduction control part 11 retrieves and reads the image data from the VTR 10 according to the retrieval and display systems of the image designated by an integration control part 5. The kind of image is transferred to buffers 15 and 13 by a code recognition part 12 and displayed on devices 14 and 16. It is transmitted to a printer 17 to form a film 18 when required.
    • 10. 发明专利
    • PICTURE READER
    • JPS62193365A
    • 1987-08-25
    • JP3293386
    • 1986-02-19
    • HITACHI MEDICAL CORP
    • HORIUCHI HIDEYUKIYOKOUCHI HISATAKESHINPO CHIAKIONODERA YOICHI
    • H04N1/407G03B42/02G06K9/20G06T1/00H04N1/04H04N1/12H04N1/19H04N1/40
    • PURPOSE:To reduce the influence of noise by reducing the light unevenness on a film by an optical fiber and a light diffusing plate and reducing the noise component by the output of a CCD one-dimensional line sensor and the correlative double sampling method and providing a signal correcting circuit part with a means which adds and averages white-and-black correcting data. CONSTITUTION:A light diffusing plate 6 is inserted between the exit end of an optical fiber 5 and an X-ray film 7 to reduce the spatial light variance of the quantity of projected light. The light transmitted through and diffused by the X-ray film 7 passes an optical mirror 9 to focus a film image on a CCD one-dimensional line sensor 12 by a focusing lens 10 and is converted to an electric signal proportional to the intensity of light. An optical output monitor signal detected by a photodetector 18 passes an amplifier 19 and an AD converter 20 to obtain a digital signal REF. A signal correcting circuit 21 performs various corrections and logarithmic conversion with AD-converted digital signal SIG and REF to obtain correct X-ray film density information, and this information is stored in a picture memory and is outputted to a CRT display device 23 or the like as required.