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1. 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.

2. 发明专利

JPS62177A TELEVISION CAMERA EQUIPMENT 失效
公开(公告)号：JPS62177A
公开(公告)日：1987-01-06
申请号：JP3516286
申请日：1986-02-21
申请人： HITACHI LTD , HITACHI MEDICAL CORP
发明人： YOKOUCHI HISATAKE , MARUYAMA MASANORI , TAKAHASHI FUMITAKA , TSUNEOKA MASAYUKI
IPC分类号： H04N5/228
摘要： PURPOSE:To prevent occurrence of 'ripple' phenomenon by enlarging electric field strength between a target face and a mesh. CONSTITUTION:In a high voltage generating section 12, an impressing voltage EC4 of a mesh electrode G4 is adjusted to >=1,400V, an impressing voltage EC3 of a beam converging electrode G3 is adjusted to about 1,000V. Then, electric field strength Ed between a target and mesh electrode becomes >=5.3V/cm, and the ripple phenomenon no longer occurs in the range where beam current ib is 1.5 times maximum signal current ismax. Accordingly, it is sufficient to adjust beam current ib 1.5 times the maximum signal current ismax by a volume 16 for adjusting beam current when necessary.

3. 发明专利

JPS61194978A DISPLAY OUTPUT DEVICE 失效
公开(公告)号：JPS61194978A
公开(公告)日：1986-08-29
申请号：JP3439585
申请日：1985-02-25
申请人： HITACHI LTD , HITACHI MEDICAL CORP
发明人： YOKOUCHI HISATAKE , TAKAHASHI FUMITAKA , TSUNEOKA MASAYUKI
IPC分类号： H04N5/228 , H04N5/235 , H04N5/32 , H05G1/60
摘要： PURPOSE:To always obtain image with a high SN ratio in high spatial and time resolutions as well as a fluoroscopic image with a high SN ratio by changing the beam current according to the variable scanning mode. CONSTITUTION:Video signals from a TV camera 6 are displayed on a TV monitor 7, and simultaneously converted into digital signals by an A/D converter 8, and further into density information by a logarithmic converter 9. An imaging agent injector 19 injects the imaging agent in the vein. An X-ray images on a part concerning before the imaging agent arrives agent arrives and are recorded an image memory 11. Thereafter, the difference between both the signals is figured out, subjected to image emphasis, gamma conversion, etc. in the image processing section 13, converted into analog signals in the D/A converter 14 and displayed on the TV monitor 15. The number of picture elements and frames to be taken in, beam current, etc. are then set according to the mode as the mode is designated by the operator for display on the control section 17.

4. 发明专利

JPS6284655A IMAGE READER 失效
公开(公告)号：JPS6284655A
公开(公告)日：1987-04-18
申请号：JP22361385
申请日：1985-10-09
申请人： HITACHI LTD , HITACHI MEDICAL CORP
发明人： HORIUCHI HIDEYUKI , SHINPO CHIAKI , YOKOUCHI HISATAKE , SUZUKI RYUICHI
IPC分类号： H04N1/04 , H04N1/12
摘要： PURPOSE:To reduce the size of a light convergence system by providing two plane light reflecting mirrors which are arranged perpendicularly to a photoscanning direction and also at right angles to an optical fiber. CONSTITUTION:The plane reflecting mirrors 10 and 11 are arranged perpendicularly to a photoscanning surface and also at right angles to the optical fiber. Scattered light from a film passes through a cylindrical lens 6 and then the majority of it is image-formed directly on the incidence end of the optical fiber 7. The cylindrical lens 6 has no lens operation in the photoscanning direction, so luminous flux reflected by a plane reflecting mirror travels to a position symmetrical to the plane reflecting mirror in the same way with the absence of the plane reflecting mirror. Therefore, the optical fiber 7 operates equivalently to an optical fiber 7'. Consequently, the optical fibers are reduced.

5. 发明专利

JPS58207038A Device for processing image by radiant ray 失效
标题翻译：用于通过辐射射线处理图像的装置
公开(公告)号：JPS58207038A
公开(公告)日：1983-12-02
申请号：JP8993382
申请日：1982-05-28
申请人： Hitachi Ltd , Hitachi Medical Corp
发明人： NAKAGAWA MANABU , YOKOUCHI HISATAKE , KAWAGUCHI FUMIO , KOUNO HIDEKI , SHIMA SHIZUROU
IPC分类号： G03B42/02 , A61B6/00 , G01N23/04 , G01T1/29 , H04N5/32 , H04N7/18
CPC分类号： G01N23/043 , G01T1/2012
摘要： PURPOSE:To provide both functions of fluoroscopy and photographing and space and density resolutions which are more effective than the film photographing, by commonly making operational processing on electric signals from a fluoroscopy apparatus and latent image recording device. CONSTITUTION:In the case of fluoroscopy, an image obtained by transmiting the X-ray of an X-ray tube 201 through an object 202 enters into an image intensifier 203 and is picked up by a TV camera 205 through a lens system 204. Then the image is displayed on a display 207 after it is processed by a digital signal processing system 206 and stored in a file for fluoroscopy 208 if required. In the case of photographing, an imaging plate 210 of a high sensitivity and a high resolution is put in front of the intensifier 203 by sliding. After a latent image by the X-ray is formed, the imaging plate 210 returns to the original position and scanned by a laser light 211. The scanned image is converted into electric signals and processed at the processing system 206, and then, stored in a file for photographing 213. Since a high sensitivity imaging plate is used, the difference in the radiation quantity between the fluoroscopy and photographing is small and, therefore, one set of X-ray tube can be used for both fluoroscopy and photographing.
摘要翻译：目的：通过对荧光透视装置和潜像记录装置的电信号进行通常的操作处理，提供荧光透视和拍摄的功能以及比胶片拍摄更有效的空间和密度分辨率。构成：在荧光透视的情况下，通过透过物体202透射X射线管201的X射线而获得的图像进入图像增强器203，并且通过透镜系统204由电视摄像机205拾取。然后在由数字信号处理系统206处理之后，将图像显示在显示器207上，并且如果需要则存储在用于荧光透视的文件208中。在拍摄的情况下，通过滑动将高灵敏度和高分辨率的成像板210放在增强器203的前面。在形成了通过X射线的潜像之后，成像板210返回到原始位置并通过激光211扫描。扫描图像被转换成电信号并在处理系统206处被处理，然后存储在用于拍摄的文件213.由于使用高灵敏度成像板，因此荧光透视和拍摄之间的辐射量差异小，因此可以使用一组X射线管进行荧光透视和摄影。

6. 发明专利

JPS61261976A X-RAY TELEVISION DEVICE 失效
公开(公告)号：JPS61261976A
公开(公告)日：1986-11-20
申请号：JP10135885
申请日：1985-05-15
申请人： HITACHI LTD , HITACHI MEDICAL CORP
发明人： TAKAHASHI FUMITAKA , YOKOUCHI HISATAKE , TAKASAKI YUKIO , TSUNEOKA MASAYUKI
IPC分类号： G21K5/02 , A61B6/00 , G01N23/04 , H04N5/228 , H04N5/32 , H04N7/18
摘要： PURPOSE:To offer an after-image effective for the reduction of X-ray quantum noise by limiting beam current within 1.5 times as much as signal current when the signal current of an image pickup tube is below 100 nA. CONSTITUTION:X-rays generated at an X-ray tube 1 are made incident on an X-ray image intensifier 3 passing through a subject to be tested 1. At this place, the X-rays are converted to rays of light and are image-picked up at a television camera 6 passing through a tandem lens 4. And an image is displayed on a television monitor. At such a time, the beam current is set below 1.5 times as much as the signal current in advance. And an X-ray condition and a movable optical diaphragm 5 are adjusted so that the setting value of the signal current is below 100 nA. Thus, the x-ray quantum noise is reduced and the image pickup tube with low after-image can be used.

7. 发明专利

JPS61261975A X-RAY TELEVISION DEVICE 失效
公开(公告)号：JPS61261975A
公开(公告)日：1986-11-20
申请号：JP10135785
申请日：1985-05-15
申请人： HITACHI LTD , HITACHI MEDICAL CORP
发明人： TAKAHASHI FUMITAKA , YOKOUCHI HISATAKE , TAKASAKI YUKIO , TSUNEOKA MASAYUKI
IPC分类号： G21K5/02 , A61B6/00 , G01N23/04 , H04N5/32 , H04N7/18
摘要： PURPOSE:To produce an after-image effective for the reduction of X-ray quantum noise by lowering the target impressing electric field strength of an image pickup tube in which a block-type photo conductive layer is provide. CONSTITUTION:X-rays generated at an X-ray tube 1 are made incident on an X-ray image intensifier 3 passing through a subject to be tested 2. And they are converted to rays of light and are image-picked up at a television camera 7 through a tandem lens 4 and displayed at a monitor 8. At such a time, the target impressing electric field strength of the image pickup tube is set below 1.24 X 10 v/m and at the same time, a movable optical diaphragm 5 and a light image intensifier 6 are adjusted. By using such a device, it is possible to reduce the X-ray quantum noise and to use the image pickup tube with high resolution power and low after-image.

8. 发明专利

JPS60103941A RADIATION IMAGE DETECTOR 失效
公开(公告)号：JPS60103941A
公开(公告)日：1985-06-08
申请号：JP21094683
申请日：1983-11-11
申请人： HITACHI LTD , HITACHI MEDICAL CORP
发明人： YOKOUCHI HISATAKE , TAKAHASHI TETSUHIKO , TSUNEOKA MASAYUKI
IPC分类号： G01N23/04 , A61B6/00

9. 发明专利

JPS60103876A INPUTTING DEVICE OF PICTURE 失效
公开(公告)号：JPS60103876A
公开(公告)日：1985-06-08
申请号：JP21094483
申请日：1983-11-11
申请人： HITACHI LTD , HITACHI MEDICAL CORP
发明人： YOKOUCHI HISATAKE , MARUYAMA MASANORI , TSUNEOKA MASAYUKI
IPC分类号： G03B42/02 , G01N23/04 , H04N5/228
摘要： PURPOSE:To obtain a picture with a satisfactory SN ratio by controlling a scanning beam diameter, followed by an increase and a decrease in the number of scanning lines in terms of picture inputting device which increases and decreases the number of scanning lines per picture and changes the number of fetched pictures per unit time of the picture. CONSTITUTION:From a controller 14 of the entire device, the instruction deciding whether the current mode is a spacial high resolution one or a time high resolution one is transferred to a control circuit 6 of a television camera 5, an A/D convertor 10, a picture processor 11, a display 12 and a picture file 13. When the instruction is the spacial high resolution mode, the control circuit 6 adjusts a scanning beam diameter so that it will be minimized by utilizing a focal coil 7, and sets an action of the television camera by utilizing scanning coils 8 and 9 so that the fetched number by second will become 15 pictures and the number of scanning lines will become 1,125 lines. When the instruction from the controller 14 is the time high resolution mode, a television camera system is set so that the fetched number by second will become 60 pictures, and the number of scanning lines will become 525 lines. Devices 10-13 execute the same action at the time of the special high resolution mode.

10. 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.

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