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1. 发明专利

JPS6366023B2 失效
公开(公告)号：JPS6366023B2
公开(公告)日：1988-12-19
申请号：JP7386279
申请日：1979-06-11
申请人： SHIMADZU CORP
发明人： TANAKA SHUJI
IPC分类号： H01J29/38

2. 发明专利

JPH06337933A PICTURE PROCESSOR 失效
公开(公告)号：JPH06337933A
公开(公告)日：1994-12-06
申请号：JP12873993
申请日：1993-05-31
申请人： SHIMADZU CORP
发明人： KAWAI MASUMI , TANAKA SHUJI
IPC分类号： A61B6/00 , G06T1/00 , G06T5/00 , G06T5/20 , H04N1/407 , H04N1/409 , H04N5/208 , G06F15/68 , G06F15/62
摘要： PURPOSE:To obtain a picture of high quality emphasizing only the edge of an original picture without emphasizing a noise component included in the original picture by executing weak edge emphasis in a low luminance part and executing strong edge emphasis in a high luminance part. CONSTITUTION:This picture processor is provided with a non-linear circuit 1 for executing the non-linear processing of an original picture and then executing I/O conversion, an edge emphasizing circuit 2 for emphasizing the edge of the non-linearly processed picture and an adder 3 for adding the edge- emphasized picture to the original picture. The circuit 1 compresses the low luminance part of the original picture, extends its high luminance part and converts I/O characteristics into non-linearity. The circuit 2 executes the emphasis of the edge of the non-linearly converted picture. Thereby weak edge emphasis is executed in the low luminance part, strong edge emphasis is executed in the high luminance part and a component expressing the real edge is emphasized. When the edge-emphasized picture is applied to the original picture, only the edge of the original picture is emphasized.

3. 发明专利

JPH06119989A X-RAY DEVICE 失效
公开(公告)号：JPH06119989A
公开(公告)日：1994-04-28
申请号：JP28679992
申请日：1992-09-30
申请人： SHIMADZU CORP
发明人： KAWAI MASUMI , TANAKA SHUJI
IPC分类号： A61B6/00 , H05G1/02
摘要： PURPOSE:To lessen the X-ray dosage to the skin of a human body to be irradiated by controlling the effective filter thickness according to the information about the tube voltage, by increasing the filter thickness when the tube voltage is low, and thereby reducing soft X-ray. CONSTITUTION:The scope of irradiation is restricted by furnishing a lead cone 2 at the X-ray irradiation aperture of an X-ray tube 1, and in the neighborhood of the cone 2, a collimator 3 for X-ray is installed which has a movable filter device 4 confronting the cone 2, and is operated in conformity to the tube voltage signal given by an X-ray control device, not illustrated, i.e., a kV signal. The device 4 is formed from two aluminum plates 41, 42, for example in the form of varying thickness in wedge shape, and these are moved in opposite directions simultaneously as indicated by arrows and intruded into and retreated from the scope of X-ray irradiation so that the effective thickness varies. Because the device 4 is only required to have a varying effective thickness for the X-ray penetrating the device, its may also be accepted that aluminum plate of a certain thickness is rotated round the axis to adjust the X-ray amount passing. In this manner, soft X-ray are lessened which do not contribute to photo-sensing of an image intensifier.

4. 发明专利

JPH06114046A X-RAY TELEVISION DEVICE 失效
公开(公告)号：JPH06114046A
公开(公告)日：1994-04-26
申请号：JP28680192
申请日：1992-09-30
申请人： SHIMADZU CORP
发明人： SHIMIZU YASUMITSU , TANAKA SHUJI
IPC分类号： A61B6/00
摘要： PURPOSE:To enhance the resolving power of an image by reducing the unused part of a solid-state imaging device to enhance the utilization efficiency of said imaging device in the case of the use of the solid-state imaging device having an aspect ratio different from that of the output image of an image intensifier. CONSTITUTION:A conversion lens 41 converting the aspect ratio of the output image of an image intensifier 3 is inserted between the image intensifier 3 on which an X-ray transmission image is incident and a television camera 5 and, as a television monitor device, one capable of independently adjusting the size of a display screen longitudinally and laterally is used. The image sent through the conversion lens 41 is formed on a solid-state imaging device 52 by a television lens 51.

5. 发明专利

JPH05309086A 失效
公开(公告)号：JPH05309086A
公开(公告)日：1993-11-22
申请号：JP14666992
申请日：1992-05-11
申请人： SHIMADZU CORP
发明人： SHIMIZU YASUMITSU , TANAKA SHUJI
IPC分类号： A61B6/00 , H04N5/325
摘要： PURPOSE:To observe and confirm a photographic image at the time of photographing by obtaining an X-ray image signal from a CCD camera, allowing it to pass through a recursive filter circuit, imparting a residual image effect thereto, and thereafter, transmitting it to an image display device and displaying it. CONSTITUTION:At the time of radioscopy, X rays of a small of a small dose are radiated from an X-ray tube 3 and a video signal is obtained by an image intensifier 6 and a CCD camera 7. The CCD camera 7 scarcely has a residual image, therefore, let a recursive filter coefficient be small. In such a way, radioscopy is executed, and when barium comes to a target part, film photographing is instructed by operating an X-ray controller 5. In an X-ray radioscopic photographing stand 1, an X-ray film is carried on the front of the image intensifier 6 and X rays of a large dose are exposed. A radioscopic signal and a photographing signal transmitted to an image processor 8 are turned off and on, respectively, and the recursive filter coefficient becomes larger from small one. As a result, a residual image effect becomes large and an image at the time of photographing is displayed on a display image plane of a monitor device 9.

6. 发明专利

JPS6217940A X-RAY IMAGE INTENSIFIER AND SYSTEM EMPLOYING IT 失效
公开(公告)号：JPS6217940A
公开(公告)日：1987-01-26
申请号：JP15716985
申请日：1985-07-16
申请人： SHIMADZU CORP
发明人： TAKEUCHI MAMORU , YOSHIMURA KIMIO , TANAKA SHUJI
IPC分类号： H04N7/18 , G21K4/00 , H01J29/18 , H01J29/38 , H01J31/50
摘要： PURPOSE:To smooth the noise component by irradiating specific amount of X-ray such that 50% residual light characteristic will be within specific range. CONSTITUTION:Material containing any one of ZnSiO4: MnAs, ZnSiO: Mn, ZnS:Ag, Cu and Mn is employed or mixed as the output fluorescent screen material. Material containing Mn is employed or mixed as the input fluorescent screen. Then X-ray is irradiated by 25muR/S to lengthen the residual lighting time such that the time required for attenuating the output brightness by 50% upon stoppage of irradiation will be about 10-300mS. With such image intensifier, smooth picture image can be obtained in X-ray imaging.

7. 发明专利

JPH0810246A ROTARY X-RAY RADIOGRAPHING APPARATUS 失效
公开(公告)号：JPH0810246A
公开(公告)日：1996-01-16
申请号：JP17340694
申请日：1994-06-30
申请人： SHIMADZU CORP
发明人： SHIBATA KOICHI , TANAKA SHUJI
IPC分类号： A61B6/00
摘要： PURPOSE:To easily observe a remarked part by displaying the remarked part at a fixed position even in the images observed from any angle. CONSTITUTION:When the positions of the remarked parts in the images in two directions displayed on an image monitoring device 42 are indicated with a joy stick 45, an image shift device 44 calculates shift quantity to display the remarked part at the fixed position from the positions in two images and the angles of them, and shifts each image by that quantity.

8. 发明专利

JPH06205296A X-RAY IMAGE PICKUP DEVICE 失效
公开(公告)号：JPH06205296A
公开(公告)日：1994-07-22
申请号：JP36040092
申请日：1992-12-31
申请人： SHIMADZU CORP
发明人： KAWAI MASUMI , TANAKA SHUJI
IPC分类号： A61B6/00 , H04N5/321 , H04N5/325
摘要： PURPOSE:To obtain a picture with an edge of a bone or a soft organization or the like superimposed on a contrast image in real time by obtaining a mask image and switching a voltage applied to a focus adjustment electrode to a defocusing use voltage during a period of time when the mask image is stored in a picture storage device. CONSTITUTION:A focus adjustment electrode 7 of an image intensifier 4 switches between a focus voltage and a voltage with a focus defocused by a changeover device 8. Thus, an afocal mask image is obtained and stored in a picture memory 92. That is, the mask image subjected to smoothing is obtained in real time without any picture processing. Then the mask image is read from the picture memory 92 and subtracted with a live image, then a picture in which an edge of a bone or a soft organization or the like is superimposed on a contrast image is obtained in real time.

9. 发明专利

JPH05335094A 失效
公开(公告)号：JPH05335094A
公开(公告)日：1993-12-17
申请号：JP16536992
申请日：1992-05-31
申请人： SHIMADZU CORP
发明人： TANAKA YASUSHI , FUJINO YOSHIYUKI , TANAKA SHUJI
IPC分类号： H05G1/64 , A61B6/00 , H05G1/34
摘要： PURPOSE:To prevent an increase in the exposure dose of a subject and provide a stable fluoroscopic image. CONSTITUTION:A tube voltage control circuit 6 feeds back X-ray output transmitted through a subject, and applies control voltage Vv to a high voltage generation circuit, thereby controlling FKV. This control voltage Vv and another voltage corresponding to SID are inputted to a tube current control circuit 8, and tube current control voltage Va basically proportional to the voltage Vv but so limited as to correspond to SID is obtained. This voltage Va is, then, sent to a filament heating circuit 9 for controlling FmA.

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