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31. 发明专利

JPH0847490A X-RAY CAMERA 失效
公开(公告)号：JPH0847490A
公开(公告)日：1996-02-20
申请号：JP18703594
申请日：1994-08-09
申请人： HITACHI MEDICAL CORP
发明人： BABA RIKA , UEDA TAKESHI , YOKOUCHI HISATAKE
IPC分类号： A61B6/00 , H04N5/321
摘要： PURPOSE:To achieve a higher diagnosing performance at a peripheral part of a picture of a large field digital X-ray image by enabling the correction of geometric distortion without lowering a resolving power of an interested area. CONSTITUTION:In an X-ray camera which is made up of an X-ray tube 2, X-ray TV cameras 4 and 5 and an image collector/processor 6 to correct the distortion of a taken image of a subject 7, a means (elongation means 6a) is provided to set a pixel size for the image collector/processor 6 so that the size on an input surface of the X-ray TV camera of an image after the correction of the distortion is smaller than the minimum value in an interest area specified separately of the pixel size on an X-ray inputting surface of the image before the correction of the distortion.

32. 发明专利

JPH0824248A X-RAY PHOTOGRAPTING APPARATUS AND CONE BEAM CT APPARATUS 失效
公开(公告)号：JPH0824248A
公开(公告)日：1996-01-30
申请号：JP16383694
申请日：1994-07-15
申请人： HITACHI MEDICAL CORP
发明人： BABA RIKA , UEDA TAKESHI , SEKIHARA KENSUKE
IPC分类号： A61B6/03 , A61B6/00
摘要： PURPOSE:To perform correction of a geometrical strain with high accuracy and high efficiency in an X-ray photographic apparatus such as a cone beam CT apparatus. CONSTITUTION:Standard lines 13a being parallel and perpendicular to the signal reading-out direction of an X-ray television camera 5, a chart for measuring a strain wherein markers indicating the differences in the degree of X-ray absorption are arranged in a rightly crossed lattice and a means for fixing the chart on the X-ray inputting face of the camera so as to make the arrangement of the markers approximately coincide with the standard line, are provided. In addition, based on the result of comparison of an actual image coordinate of each marker on the chart with an ideal image coordinate of each marker in the case when there exists no strain, a preliminary treating part 14 wherein a positional corresponding table 14a for making each coordinate of the actual image correspond to each coordinate being each picture element unit of the ideal image and an integer value is prepd. on each rotational angle, and a main treating part 15 wherein when a object to be examined is photographed, correction of the image obtd. from the object to be examined is performed by referring to the positionally corresponding table of the rotational angle are provided.

33. 发明专利

JPH08602A X-RAY PROJECTED IMAGE MEASURING DEVICE AND METHOD THEREFOR 失效
公开(公告)号：JPH08602A
公开(公告)日：1996-01-09
申请号：JP13410494
申请日：1994-06-16
申请人： HITACHI MEDICAL CORP
发明人： SEKIHARA KENSUKE , UEDA TAKESHI , BABA RIKA
IPC分类号： A61B6/00 , A61B6/03
摘要： PURPOSE:To reconstitute an accurate image, in an X-ray computerized tomographic device that is purposed for the human body for especially obtaining a three-dimensional image from two-dimensional projected data, by obtaining a larger field of view than the converted value at the center of view fields in the width of detectors. CONSTITUTION:A plurality of detectors 8, 10 that have been installed so that the centers of the detection surfaces thereof have been deviated with regard to the rotational center of a scanner are used. In other words, the points 12, 13 where the lines connecting the focuses of X-ray generators 7, 9 and the rotational center of a scanner intersect with the respective detection surfaces are deviated from the centers of the detection surfaces, respectively. Thus, by synthesizing the obtained image data new image data having a large field of view can be obtained.

34. 发明专利

JPH06319729A X-RAY PHOTOGRAPHING METHOD AND APPARATUS 失效
公开(公告)号：JPH06319729A
公开(公告)日：1994-11-22
申请号：JP10914193
申请日：1993-05-11
申请人： HITACHI MEDICAL CORP
发明人： BABA RIKA , UEDA TAKESHI , HARA MOICHI , UMETANI KEIJI , ONODERA YOICHI , KAJIYAMA TOMOHARU , YOKOUCHI HISATAKE , TAKAHASHI FUMITAKA
IPC分类号： A61B6/00 , A61B6/06 , H04N5/321
摘要： PURPOSE:To enable the X-ray photographing of the area wider than the visual field an X-ray detector with high spatial resolving power by providing a mechanism moving an X-ray detection system so as to make the same parallel to an X-ray grid to perform photographing two or more times not only to accurately perform the joining of an image but also to shield an unnecessary visual from X-rays. CONSTITUTION:An X-ray grid 6 is arranged at a position where the center line connecting the center of the surface of the grid and an X-ray source from an X-ray tube 3 becomes vertical to the surface of the grid. The X-ray grid 6 arranged in a longitudinal direction so that X-ray absorbing plates 6-1, 6-2, 6-3 constituting the grid 6 become vertical to the moving direction of an X-ray detection system for twice photographing. The periphery of the X-ray grid 6 is covered with an X-ray shield plate 21 and the part not covered with the grid of the X-ray input surface of the X-ray detection system is covered with the X-ray shield plate.

35. 发明专利

JP2011067305A Radiographic instrument 有权
标题翻译：放射性仪器
公开(公告)号：JP2011067305A
公开(公告)日：2011-04-07
申请号：JP2009219907
申请日：2009-09-25
申请人： Hitachi Medical Corp , 株式会社日立メディコ
发明人： BABA RIKA
IPC分类号： A61B6/03
摘要： PROBLEM TO BE SOLVED: To reduce inclusion of an artifact due to the variation of an offset value or a sensitivity value which cannot be removed only by the correction of variation of an offset or sensitivity of a two-dimensional detector from the time of data measurement by a radiographic instrument. SOLUTION: The radiographic instrument has a storage section storing the amount of correction including the variation of the amount of offset and the variation of the amount of sensitivity computed by using the measurement image of a mimic subject, and a processing section computing a correction image by carrying out a calibration correction computation by using the amount of correction for the measurement image of the subject, computes an average value in the target area, obtains a pixel value corrected by the amount of offset and the amount of sensitivity which take into account the amount of correction by setting a target area for pixels on the correction image, with respect to the amount of correction, after correcting the amount of offset and the amount of sensitivity of the detector, and computes the amount of correction to make the pixel value and the average value equal to each other. The radiographic instrument inclusively corrects the variations of the offset value and the sensitivity value of the detection element and reduces an error of the calibration correction computation. As a result, the radiographic instrument permits a high-quality reconstructed image in which the artifact is reduced to be obtained. COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：为了减少由于偏移值或灵敏度值的变化引起的伪像的包含，仅通过校正二维检测器的偏移或灵敏度的变化的时间不能被去除通过射线照相仪测量数据。解决方案：射线照相仪具有存储部分的存储部分，该存储部分包括通过使用模拟对象的测量图像计算的偏移量的变化和灵敏度的变化量的校正量，以及计算通过使用对象的测量图像的校正量执行校正校正计算，计算目标区域中的平均值，获得通过偏移量校正的像素值和所进行的灵敏度量的校正图像通过在校正偏移量和检测器的灵敏度量之后，相对于校正量设置校正图像上的像素的目标区域来计算校正量，并且计算校正量以使像素值和平均值相等。射线照相仪器包括校正偏移值和检测元件的灵敏度值的变化，并减少校准校正计算的误差。结果，射线照相仪允许获得伪像的高质量重建图像。版权所有（C）2011，JPO＆INPIT

36. 发明专利

JP2010035977A Radiographic apparatus 审中-公开
标题翻译：放映设备
公开(公告)号：JP2010035977A
公开(公告)日：2010-02-18
申请号：JP2008205538
申请日：2008-08-08
申请人： Hitachi Medical Corp , 株式会社日立メディコ
发明人： BABA RIKA
IPC分类号： A61B6/00 , A61B6/03
摘要： PROBLEM TO BE SOLVED: To expand a reconstitution view by a simple modification in an X-ray apparatus in which a rotation angle of a pair of an X-ray source and a detector is insufficient.
SOLUTION: Control is conducted so that a rotational center is moved relative to a subject-maintaining device when the X-ray source emits an X-ray while rotating. This movement is conducted by using an existing mechanism such as a mechanism which adjusts the position of a supporting column of the X-ray apparatus. In addition, the movement and rotation may be constructed so that these are conducted at different times or conducted concurrently for a given time.
COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：要解决的问题：通过在一对X射线源和检测器的旋转角度不足的X射线设备中的简单修改来扩大重构视图。解决方案：当X射线源旋转时发射X射线时，进行控制，使得旋转中心相对于被摄体保持装置移动。该运动通过使用诸如调节X射线装置的支撑柱的位置的机构的现有机构来进行。此外，运动和旋转可以被构造成使得它们在不同的时间进行或在给定的时间同时进行。版权所有（C）2010，JPO＆INPIT

37. 发明专利

JP2009106433A Radiation imaging apparatus 有权
标题翻译：辐射成像装置
公开(公告)号：JP2009106433A
公开(公告)日：2009-05-21
申请号：JP2007280292
申请日：2007-10-29
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 , A61B6/00
摘要： PROBLEM TO BE SOLVED: To highly accurately correct scattered X-rays at a high speed by simple preparation and a process operation and to improve the image quality of images obtained by X-ray measurement.
SOLUTION: Obtained measurement data are corrected for each pixel using a correction function which is formed beforehand and for which the measurement data and a correction value are made to correspond. For correction, replacement is performed when the correction value is obtained by direct X-ray intensity and the correction value is subtracted from the measurement data when the correction value is obtained by scattered X-ray intensity.
COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：通过简单的准备和处理操作来高精度地高精度地校正散射的X射线，并提高通过X射线测量获得的图像的图像质量。解决方案：使用预先形成的校正功能并且使测量数据和校正值对应于所获得的每个像素的测量数据。为了校正，当通过直接X射线强度获得校正值时进行替换，并且当通过散射X射线强度获得校正值时，从测量数据中减去校正值。版权所有（C）2009，JPO＆INPIT

38. 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

39. 发明专利

JP2004057438A Three-dimensional x-ray measuring apparatus 有权
公开(公告)号：JP2004057438A
公开(公告)日：2004-02-26
申请号：JP2002219184
申请日：2002-07-29
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： G21K5/02 , A61B6/00 , G21K5/10
摘要： PROBLEM TO BE SOLVED: To provide a three-dimensional X-ray measuring apparatus, established without any obstacle to the existing radiotherapy apparatus, endoscope surgical treatment apparatus and thighbone digging apparatus.
SOLUTION: This 3-dimensional X-ray measuring apparatus is composed of an X-ray source for generating X rays, an X-ray detector 102 for detecting X-rays transmitted through an object 123, a support rod 103 supporting the above, and a strut 104 having a rotary mechanism for rotating the support rod 103. A center line 106 connecting between the X-ray source and the center of the detecting surface of the X-ray detector is inclined to the rotation axis 105 of the support rod 103.
COPYRIGHT: (C)2004,JPO

40. 发明专利

JP2000217810A CONE BEAM CT DEVICE 失效
公开(公告)号：JP2000217810A
公开(公告)日：2000-08-08
申请号：JP2164799
申请日：1999-01-29
申请人： HITACHI MEDICAL CORP
发明人： BABA RIKA , UEDA TAKESHI
IPC分类号： A61B6/03
摘要： PROBLEM TO BE SOLVED: To eliminate movement of an object by splitting a radioscopic image into plural sets different from each other, and generating an X-ray tomographic image or a three-dimensional image according to the radioscopic image set with the maximum sharpness at every X-ray distributed image among radioscopic image images reconfigured in every set. SOLUTION: According to a control signal from a control collecting device 109, measurement of a radioscopic image is started, and a rotating device 108 is rotated. When the angle of rotation reaches a designated angle, an X-ray generator 101 radiates X-rays, and the transmitted X-rays are measured by a two-dimensional radioscopic image detecting device 102 to form an image. A control collecting device 109 collects the radioscopic image with an angle of rotation, that is, a projection angle of the rotating device 108 to be stored in a storing device. Subsequently, gamma correction, image distortion correction, logarithmic conversion, and correction for uneven sensitivity of a two-dimensional detector are made by a processing display device 110, and then a three- dimensional X-ray distribution image is formed and displayed. Thus, the movement of an object in the course of photographing can be eliminated.

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