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1. 发明专利

JPH0823477A X-RAY TRANSMISSION AND IMAGE PICKUP DEVICE 失效
公开(公告)号：JPH0823477A
公开(公告)日：1996-01-23
申请号：JP15407494
申请日：1994-07-06
申请人： HITACHI MEDICAL CORP
发明人： KAJIYAMA TOMOHARU , UEDA TAKESHI , ONODERA YOICHI , UMETANI KEIJI , YOKOUCHI HISATAKE
IPC分类号： H05G1/64 , A61B6/00 , H04N5/321
摘要： 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.

2. 发明专利

JPH07236090A X-RAY DIAGNOSTIC DEVICE 失效
公开(公告)号：JPH07236090A
公开(公告)日：1995-09-05
申请号：JP2415994
申请日：1994-02-22
申请人： HITACHI MEDICAL CORP
发明人： TAKAHASHI FUMITAKA , YOKOUCHI HISATAKE
IPC分类号： A61B6/00 , H04N5/32 , H04N5/321
摘要： PURPOSE:To make the after image of the rise and fall of the X-ray TV camera constant in each photographing mode. CONSTITUTION:The device is provided with an image intensifier 3 converting the X-ray image into light image, X-ray TV camera 6 converting the light image of the image intensifier 3 into a video signal through an image pickup tube 5 and switching it into plural photographing modes, and bias light 8 irradiating the light to the image pickup tube 5 before the X-ray exposure. A control means 12 controlling the light amount of the bias light 8 to be constant per one screen by the selected photographing mode is provided.

3. 发明专利

JPH0730793A IMAGE PHOTOGRAPHING DEVICE 失效
公开(公告)号：JPH0730793A
公开(公告)日：1995-01-31
申请号：JP17286093
申请日：1993-07-13
申请人： HITACHI LTD , HITACHI MEDICAL CORP
发明人： UMETANI KEIJI , KATAKURA KAGEYOSHI , UEDA TAKESHI , YOKOUCHI HISATAKE
IPC分类号： G02B23/26 , H04N5/225
摘要： PURPOSE:To provide an image photographing device equipped with resolution exceeding the limitation of the principal resolution of an optical system only with an optical lens by the optical system using the optical lens and a fiber optical element. CONSTITUTION:The image of a visible beam 91 is formed on an image forming face of a fiber optical element 10 by an optical lens 90. The fiber optical element 10 is composed of tapered fiber bundle, and the dimension of the fiber optical element face in contact with the image detecting face of an image detector 70 is reduced rather than the dimension of the image forming face 11. The image formed on the image forming face 11 is reduced and detected by the image detector 70. Thus, the high-speed photographing of the high-resolution image is enabled.

4. 发明专利

JPH06181540A X-RAY PHOTOGRAPHING DEVICE 失效
公开(公告)号：JPH06181540A
公开(公告)日：1994-06-28
申请号：JP33423692
申请日：1992-12-15
申请人： HITACHI MEDICAL CORP
发明人： FUJIMOTO KOJI , ONODERA YOICHI , UEDA TAKESHI , YOKOUCHI HISATAKE
IPC分类号： A61B6/00 , H04N5/321
摘要： 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 失效
公开(公告)号：JPH05249355A
公开(公告)日：1993-09-28
申请号：JP4675192
申请日：1992-03-04
申请人： HITACHI MEDICAL CORP
发明人： ONODERA YOICHI , YOKOUCHI HISATAKE
IPC分类号： G02B7/00
摘要： 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.

6. 发明专利

JPH05228132A X-RAY IMAGE INPUT SYSTEM AND LIGHT SIMULATOR USED THEREFOR 失效
公开(公告)号：JPH05228132A
公开(公告)日：1993-09-07
申请号：JP3936292
申请日：1992-02-26
申请人： HITACHI MEDICAL CORP
发明人： FUJIMOTO KOJI , ONODERA YOICHI , YOKOUCHI HISATAKE , UEDA TAKESHI
IPC分类号： A61B6/00 , H04N5/32 , H04N7/18
摘要： PURPOSE:To detect a residual image characteristic of a TV camera simple substance without detaching a TV camera, and to facilitate the adjustment of the bias light quantity by providing a means for containing a light simulator, connecting the light simulator and an X-ray source in parallel, and selecting both of them. CONSTITUTION:The objecting system irradiates an object 5 to be photographed with X rays from an X-ray tube 4, converts it to a visible light by an X-ray image intensifier 6, A/D-converts an output signal of a TV camera 8, and thereafter, displays it on a television screen, and also, stores a digital image in an image data memory 1. In this case, this system is provided with a light simulator 21 for emitting the visible light by the same time sequence as irradiation of X rays by the X-ray tube 4, and consisting of a light controller 9, a visible light emitting part 10 and a first and a second storage means 11, 12. In such a state, by operating an operator image data memory 1, a connection selecting means 2 is controlled, so that it is switched in order to select one of the light simulator 21 and the X-ray tube 4, or both of them.

7. 发明专利

JPH01300684A X-RAY PICTURE PICKUP DEVICE 失效
公开(公告)号：JPH01300684A
公开(公告)日：1989-12-05
申请号：JP12996188
申请日：1988-05-27
申请人： HITACHI MEDICAL CORP
发明人： YOKOUCHI HISATAKE , TAKASAKI YUKIO , HIRAI TADAAKI , KOIKE KOICHI , TSUNEOKA MASAYUKI , ONODERA YOICHI , FUNO TAKAKAZU
IPC分类号： H05G1/64 , H01J29/45 , H01J31/38 , H04N5/32 , H05G1/60
摘要： PURPOSE:To obtain a large visual field, to decrease the X-ray dose at fluoroscopy the same degree as that of an X-ray II and to realize the device inexpensively by using an image pickup element applying avalanche multiplication as the image pickup element. CONSTITUTION:The device consists of an X-ray control section 1, an X-ray tube 2, an object 3 to be detected, a sensor section 4, an input control section 5, a television camera 6, a picture control section 7, a display section 8, a storage section 9, an overall control section 10 and a control console 11. Then an image pickup element applying avalanche multiplication is used for the image pickup element of the television camera 6. An output signal is increased by the avalanche multiplication of the image pickup element. Thus, a large visual field is obtained and the X-ray dose at fluoroscopy is suppressed lower as the same degree as that of the X-ray II and the X-ray fluoroscopy and image pickup device realized inexpensively is obtained.

8. 发明专利

JPH01204041A ROENTGENOGRAPHIC DIAGNOSING DEVICE 失效
公开(公告)号：JPH01204041A
公开(公告)日：1989-08-16
申请号：JP2750888
申请日：1988-02-10
申请人： HITACHI MEDICAL CORP
发明人： FUNO TAKAKAZU , YOKOUCHI HISATAKE
IPC分类号： G03B42/02 , A61B6/00 , G06Q50/22 , G06Q50/24 , G16H10/60
摘要： 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.

9. 发明专利

JPS6481479A PICTURE COMPRESSION CODING CIRCUIT SYSTEM 失效
公开(公告)号：JPS6481479A
公开(公告)日：1989-03-27
申请号：JP23721087
申请日：1987-09-24
申请人： HITACHI MEDICAL CORP
发明人： FUNO TAKAKAZU , YOKOUCHI HISATAKE , MOTOIKE JUN
IPC分类号： H03M7/40 , H04N19/42 , H04N19/423 , H04N19/593 , H04N19/91
摘要： PURPOSE:To attain a high speed circuit with general-use components by decreasing the operating clock frequency of an arrangement control circuit of a variable length coding data. CONSTITUTION:A coded ROM 4 uses a conversion coefficient as an address value to output a code data and a value (m) being the result of a code data bit number in the unit of n-bit. The control circuit 5 arranging the code data shifts sequentially the variable length code data outputted in parallel to the parallel shift register 15 sequentially in the unit of 1n-bit in matching with the count (m). The shift register 15 reads the n-bit data individually to correspond to the count (m), the content of the n-bit shift register is selected in matching with the fixed length data arrangement (l)-bit to output (l)-bit. Thus, the operating clock matching the variable length code data with a fixed length data output format is realized by a frequency of 1/n. Thus, the titled system copes easily with high speed picture compression coding.

10. 发明专利

JPS62193365A PICTURE READER 失效
公开(公告)号：JPS62193365A
公开(公告)日：1987-08-25
申请号：JP3293386
申请日：1986-02-19
申请人： HITACHI MEDICAL CORP
发明人： HORIUCHI HIDEYUKI , YOKOUCHI HISATAKE , SHINPO CHIAKI , ONODERA YOICHI
IPC分类号： H04N1/407 , G03B42/02 , G06K9/20 , G06T1/00 , H04N1/04 , H04N1/12 , H04N1/19 , H04N1/40
摘要： 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.

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