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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

JPS60188868A Positron ct device 失效
标题翻译： POSITRON CT设备
公开(公告)号：JPS60188868A
公开(公告)日：1985-09-26
申请号：JP4513484
申请日：1984-03-09
申请人： Hitachi Ltd , Hitachi Medical Corp
发明人： UEDA TAKESHI , OKAJIMA KENICHI , TAKAMI KATSUMI , OOGUSHI AKIRA , ISHIMATSU KENJI
IPC分类号： G01T1/161 , G01T1/29
CPC分类号： G01T1/2985
摘要： PURPOSE:To detect gamma-ray with noise reduced by grouping gamma-ray detectors unequally, combining groups of detectors to make the shape of effective visual field to necessary ranges and making its fan fraction small. CONSTITUTION:Detectors (black circles) arranged on the circumference of a gamma-ray detecting device are grouped unequally, for instance, 13 in the first group, 15 in the second group, 15 in the third group 3-13 in the ninth group. Opposite groups, for instance, the 4-7th groups are selected for the first group, and the shape of pseudo ellipse of effective visual field 31 of good resolution is obtained. The fan fraction, a ratio of a simultaneous count detector and a total detector is made small by combining the detector groups properly. Accordingly, even if the fan fraction is small and the effective visual field is pseudo ellipse, detection can be made conformable to the shape of a subject and little noise as cephalic section the thoracic section are elliptic.
摘要翻译：目的：为了检测不均匀分组伽马射线探测器降低噪声的伽马射线，将检测器组合成使有效视野的形状达到必要范围，并使其风扇分数变小。构成：布置在γ射线检测装置的圆周上的检测器（黑色圆圈）不均匀地分组，例如，第一组中的13，第二组中的15，第九组的第三组中的15。相对的组，例如，为第一组选择第4-7组，并且获得良好分辨率的有效视野31的伪椭圆形状。通过适当地组合检测器组，使风扇分数，同时计数检测器和总检测器的比例变小。因此，即使风扇分数小，有效视野是伪椭圆，也可以使检测与被检体的形状一致，并且具有小的噪声，因为胸廓部分是椭圆形的头部。

3. 发明专利

JP2005087592A X-rays measuring instrument 审中-公开
标题翻译： X射线测量仪器
公开(公告)号：JP2005087592A
公开(公告)日：2005-04-07
申请号：JP2003327473
申请日：2003-09-19
申请人： Hitachi Ltd , Hitachi Medical Corp , 株式会社日立メディコ , 株式会社日立製作所
发明人： BABA RIKA , UEDA TAKESHI , OKABE MASAKAZU
IPC分类号： A61B6/03 , G01N23/04 , G06T11/00
CPC分类号： A61B6/466 , A61B6/032 , G01N23/04 , G06T11/005
摘要： PROBLEM TO BE SOLVED: To provide an X-ray measuring instrument where a restructured image free from artifact can be obtained in a visual field by having the visual field expanded in the direction of the rotating surface of an X-ray source.
SOLUTION: The instrument has: the X-ray source 201 for generating X-rays for irradiating an object to be tested with X-rays; an X-ray detector 202 for detecting measured data about the object to be tested; a turning device for varying the relative positions of the X-ray source 201 and the X-ray detector 202 with respect to the object to be tested; and a processor for performing arithmetic processing of the measured data. The X-ray detector 202 is arranged by being moved in the tangential direction of a turning face drawn by the X-ray source 201 by a distance shorter than a half of the length of the X-ray detector 202 in a direction parallel to the turning face. The processor obtains a three-dimensional restructured image by carrying out: processing for obtaining projection data by performing logarithmic conversion processing to the measured data; processing for multiplying weight to the value of the projection data; and processing for obtaining restructured data by performing restructure processing by using data obtained by multiplying the weight.
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：提供一种X射线测量仪器，其中通过使视野在X射线源的旋转表面的方向上扩展，可以在视野中获得没有伪影的重构图像。解决方案：仪器具有：X射线源201，用于产生用X射线照射待测物体的X射线; 用于检测关于待测试对象的测量数据的X射线检测器202; 用于改变X射线源201和X射线检测器202相对于待测物体的相对位置的转动装置; 以及用于对所测量的数据执行算术处理的处理器。 X射线检测器202通过沿着与X射线源201平行的方向在X射线源201所画的转动面的切线方向上移动距离短于X射线检测器202的长度的一半的距离而被布置转脸。处理器通过执行以下操作获得三维重构图像：通过对测量数据进行对数转换处理来获得投影数据的处理; 用于将权重乘以投影数据的值的处理; 以及通过使用通过乘以权重获得的数据进行重组处理来获得重组数据的处理。版权所有（C）2005，JPO＆NCIPI

4. 发明专利

JPH08313640A TWO-DIMENSIONAL RADIATION IMAGE DETECTOR 失效
公开(公告)号：JPH08313640A
公开(公告)日：1996-11-29
申请号：JP11813995
申请日：1995-05-17
申请人： HITACHI LTD , HITACHI MEDICAL CORP
发明人： UMETANI KEIJI , UEDA TAKESHI , MINEMURA TETSUO , TSUJI KAZUTAKA , KOIKE KOICHI
IPC分类号： G01T1/20 , G01T1/24 , G03B42/02 , H01L27/146 , H04N5/32
摘要： PURPOSE: To provide a two-dimensional radiation image detector improving spatial resolution and sensitivity. CONSTITUTION: The detector comprises a first element board 11 and a second element board 12. Phosphor films 51 each for converting radioactive rays into visible light are formed on a plurality of light receiving elements on each element board, 61 of the rays is converted to the visible light by the phosphor film of the board 11, 62 of the rays is incident to a region having no phosphor film of the first board, converted to the visible light via the phosphor film of the second board 12 to be transmitted through the first board and detected. The phosphor film is formed on the region having no phosphor film of the first board in the second board, and the ray incident to the detector is detected separately by the first and second boards. One image is synthesized from the two images detected by the boards of the two layers in such a manner that the spatial resolution is uniform with respect to the lateral and longitudinal arraying directions of pixels. Accordingly, the pixel area is increased by twice as large as that of prior art at the light receiving area.

5. 发明专利

JP2009195352A X-ray ct scanner 有权
标题翻译： X射线CT扫描仪
公开(公告)号：JP2009195352A
公开(公告)日：2009-09-03
申请号：JP2008038203
申请日：2008-02-20
申请人： Hitachi Medical Corp , 株式会社日立メディコ
发明人： OKABE MASAKAZU , UEDA TAKESHI
IPC分类号： A61B6/03
摘要： PROBLEM TO BE SOLVED: To provide an X-ray CT scanner that shortens the time required for reducing an artifact between high X-ray absorbent materials.
SOLUTION: The X-ray CT scanner is provided with an X-ray source to irradiate X rays to a subject, an X-ray detector arranged opposite to the X-ray source and giving the output of X-ray image data based on the X-ray penetrating the subject, and an X-ray image reconstruction means to produce an X-ray CT image from the image data obtained by the rotation of the X-ray source and X-ray detector. In the case when the subject includes at least a pair of high X-ray absorbent materials likely to produce artifact on its images, the image data itself is provided with a detection means to detect the differences of the X-ray source from the X-ray detector used for the subject, and an artifact correction means that prepares the X-ray CT image in the image data detection region extended up to the region including one X-ray absorbent material in response to the differences obtained by the detection means and corrects the artifact generated across the pair of high X-ray absorbent materials based on the prepared X-ray CT image.
COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：提供一种X射线CT扫描仪，其缩短了在高X射线吸收材料之间减少伪影所需的时间。
解决方案：X射线CT扫描仪设有X射线源，用于向受试者照射X射线，X射线检测器与X射线源相对设置并给出X射线图像数据的输出基于穿过被检体的X射线，以及X射线图像重建单元，根据由X射线源和X射线检测器的旋转得到的图像数据生成X射线CT图像。在被摄体包括至少一对在其图像上可能产生伪像的高X射线吸收材料的情况下，图像数据本身设置有检测装置，用于检测X射线源与X射线源的差异，用于对象的X射线检测器，以及伪影校正装置，其根据由检测装置获得的差异，根据检测装置得到的差异，将图像数据检测区域中的X射线CT图像准备到包括一个X射线吸收材料的区域基于准备的X射线CT图像，在一对高X射线吸收材料上产生伪影。版权所有（C）2009，JPO＆INPIT

6. 发明专利

JP2008272056A Radiation imaging apparatus 有权
标题翻译：辐射成像装置
公开(公告)号：JP2008272056A
公开(公告)日：2008-11-13
申请号：JP2007116752
申请日：2007-04-26
申请人： Hitachi Medical Corp , 株式会社日立メディコ
发明人： BABA RIKA , UEDA TAKESHI
IPC分类号： A61B6/03
摘要： PROBLEM TO BE SOLVED: To highly accurately switch the visual field of the two-dimensional detector of different vertical axis length and horizontal axis length by a simple configuration.
SOLUTION: The X-ray imaging apparatus of this invention is provided with a mechanism for rotating a detection surface centering on one point in a plane including the detection surface of the detector. A rotation center is determined corresponding to a purpose by matching one side of arrangement before rotation and arrangement after the rotation or matching a center line or the like.
COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：通过简单的配置，高精度地切换不同垂直轴长度和水平轴长度的二维检测器的视场。解决方案：本发明的X射线成像装置设置有用于使包括检测器的检测表面的平面中的一个点上的检测面旋转的机构。通过在旋转或匹配中心线等之前匹配旋转和排列之前的布置的一侧来确定对应于目的的旋转中心。版权所有（C）2009，JPO＆INPIT

7. 发明专利

JP2006020680A X-ray measuring apparatus 有权
标题翻译： X射线测量装置
公开(公告)号：JP2006020680A
公开(公告)日：2006-01-26
申请号：JP2004198987
申请日：2004-07-06
申请人： Hitachi Medical Corp , 株式会社日立メディコ
发明人： BABA RIKA , UEDA TAKESHI
IPC分类号： A61B6/03 , G01N23/04 , G01T1/00 , G01T1/17 , G21K3/00 , G21K5/02
摘要： PROBLEM TO BE SOLVED: To provide an X-ray measuring apparatus capable of correcting nonuniformity caused by a filter and providing a favorable three-dimensional image. SOLUTION: This X-ray measuring apparatus is provided with an X-ray source 101 generating X-rays irradiating an examinated object 108, an X-ray detector 102 detecting measurement data on the examinated object 108, a retainer 103 retaining the opposed X-ray source 101 and the X-ray detector 102, a rotating device 104 changing the relative position of the X-ray source 101 and the X-ray detector 102 to the examined object 108, and a control processor 106 computing the measurement data. This apparatus is characterized in that a filter 110 having a cross sectional shape formed by combining a recessed arc, a projecting arc and a straight line together is installed between the X-ray source 101 and the examinated object 108, and while the rotating device 104 rotates, the X-ray source 101 generates the X-rays and the X-ray detector 102 collects the measurement data. COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：提供一种能够校正由过滤器引起的不均匀性并提供有利的三维图像的X射线测量装置。解决方案：该X射线测量装置设置有产生照射检查对象物108的X射线的X射线源101，检测检查对象物108的测量数据的X射线检测器102，相对的X射线源101和X射线检测器102，将X射线源101和X射线检测器102相对于被检查对象108的相对位置改变的旋转装置104以及控制处理器106，数据。该装置的特征在于，在X射线源101和检查对象108之间安装具有通过将凹弧，突弧和直线组合而形成的横截面形状的过滤器110，而旋转装置104 旋转时，X射线源101产生X射线，X射线检测器102收集测量数据。版权所有（C）2006，JPO＆NCIPI

8. 发明专利

JP2002291726A X-RAY ROTARY RADIOGRAPHIC APPARATUS 失效
公开(公告)号：JP2002291726A
公开(公告)日：2002-10-08
申请号：JP2001100449
申请日：2001-03-30
申请人： HITACHI MEDICAL CORP
发明人： OMI YASUO , UEDA TAKESHI , SHINOHARA MASARU
IPC分类号： A61B6/00 , A61B6/02 , A61B6/03 , G06T1/00 , G06T3/00 , H04N7/18
摘要： PROBLEM TO BE SOLVED: To correct distortion of a projected image, displacement of a rotation center in the projected image or displacement of a difference image caused by the blurring to prevent reduction of a contrast or resolution of the projected image or a reconstructed image even when the shift blurring of an X-ray detector face, the angle blurring of the detector face or the rotation blurring of the detector face occurs. SOLUTION: In this apparatus, a distance measurement sensor 10, an acceleration sensor 11, an acceleration sensor 12, an acceleration sensor not shown in Figure and an acceleration sensor 13 are installed on a plane parallel to the X-ray detector face of a two-dimensional X-ray detector 7, and the shift blurring of the X-ray detector face, the angle blurring of the detector face and the rotation blurring of the detector face are detected. Based on a detected distance amount and blurring amounts, a calculation device 16 executes image transformation such as parallel translation or rotational transfer to the projected image in a cone beam CT apparatus, a C arm apparatus or the like or a LIVE image (a MASK image) in a rotary DSA apparatus or the like, and positional coordinates of projection data detected by the X-ray detector 7 are corrected.

9. 发明专利

JP2002033960A X-RAY EQUIPMENT 失效
公开(公告)号：JP2002033960A
公开(公告)日：2002-01-31
申请号：JP2000215350
申请日：2000-07-17
申请人： HITACHI MEDICAL CORP
发明人： OMI YASUO , UEDA TAKESHI , SHINOHARA MASARU
IPC分类号： A61B6/00 , G06T1/00 , H04N5/321
摘要： PROBLEM TO BE SOLVED: To provide an X-ray device for accurately performing corrected which is related to the characteristics of a two-dimensional detector. SOLUTION: The X-ray equipment is provided with an X-ray source for applying a radial-shape X-ray beam to a measurement target, a two-dimensional detection means, consisting of a means that is arranged opposite to the X-ray source and generates a visible light image from the X-ray beam through the measurement target and a means for picking up the visible light image as a two-dimensional projection image, a means for correcting the two-dimensional projection image of the measurement target, based on a correction value table generated from the two-dimensional projection image that becomes a picked up reference in advance, and a means for displaying the two-dimensional projection image after correction. The X-ray device is also provided with a means for correcting the position deviation of the image region of the visible light image, by calculating the amount of positional deviation between the reference two-dimensional projection image and the image region of each visible light image appearing in the two-dimensional projection image obtained by picking up the image of the measurement target, based on the visual field position of the generation means of the visible light image, that appears within the visual field of the image pickup means of the two-dimensional projection image.

10. 发明专利

JPH11299765A X-RAY DEVICE 失效
公开(公告)号：JPH11299765A
公开(公告)日：1999-11-02
申请号：JP10719198
申请日：1998-04-17
申请人： HITACHI MEDICAL CORP
发明人： UEKI HIRONORI , UEDA TAKESHI , IKEDA SHIGEYUKI
IPC分类号： A61B6/00
摘要： PROBLEM TO BE SOLVED: To reduce the exposed dose of a subject by calculating an X-ray condition to optimize the contrast noise ratio of a noticed substance against other parts within the maximum exposed dose in a case the feature amount of the noticed substance is known and controlling the X-ray source by the condition. SOLUTION: An optical image detected by an X-ray image intensifier 7 is made into video signals by a TV camera 9 in radiography and the singles are converted by an A/D convertor 108 and the outputted signals thereof are inputted into a fluoroscopy and imaging condition calculating means 110. Within the restriction of the maximum exposed dose set here, values of voltage, current, optical diaphragm area, etc., of an X-ray tube 1 to optimize the output of a digital image are calculated referring an X-ray condition table 112. When the feature amount of the noticed substance is already known, an X-ray condition to optimize the contrast noise ratio of the noticed substance against other parts within the maximum exposed dose of a subject during imaging is calculated to control the X-ray tube 1.

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