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1. 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

2. 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

3. 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

4. 发明专利

JP2008113792A Radiation measuring apparatus 有权
标题翻译：辐射测量装置
公开(公告)号：JP2008113792A
公开(公告)日：2008-05-22
申请号：JP2006298688
申请日：2006-11-02
申请人： Hitachi Medical Corp , 株式会社日立メディコ
发明人： BABA RIKA , UEDA TAKESHI , TSUNOMURA TAKAYOSHI
IPC分类号： A61B6/03 , G01T1/17 , G01T1/20 , G01T1/24 , H04N5/32
摘要： PROBLEM TO BE SOLVED: To provide a technique which enables the acquisition of a better image by minimizing the generation of artifact in a radiation measuring apparatus.
SOLUTION: The values of pixels detected with amplification rates different so much as to cause a level difference in images are corrected using the ratio of the amplification rates (gain ratio) calculated from actual measurement data. The positions at which the amplification rates are changed are extracted as switching positions and the values pertaining to the changeover position are calculated separately from the measurement data on both sides of each switching position to compute the gain ratio using both the values pertaining to the switching position calculated.
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：提供一种能够通过最小化辐射测量装置中的伪像的产生来获得更好的图像的技术。解决方案：使用由实际测量数据计算出的放大率（增益比）的比率来校正用放大率不同的像素所检测到的像素值，以致引起图像中的电平差异。提取放大率变化的位置作为切换位置，与各切换位置两侧的测量数据分开计算与转换位置有关的值，以使用与切换位置有关的两个值来计算增益比计算。版权所有（C）2008，JPO＆INPIT

5. 发明专利

JP2007159635A X-ray measuring apparatus, x-ray measuring method and x-ray measuring program 有权
标题翻译： X射线测量装置，X射线测量方法和X射线测量程序
公开(公告)号：JP2007159635A
公开(公告)日：2007-06-28
申请号：JP2005356342
申请日：2005-12-09
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： A61B6/14 , G06T1/00
摘要： PROBLEM TO BE SOLVED: To provide an X-ray measuring apparatus capable of obtaining an excellent panoramic images by having an X-ray source and a detector move on a simple circular trajectory, an X-ray measuring method and an X-ray measuring program.
SOLUTION: The X-ray source 3 and the detector 4 are held facing each other. A control processor 8 calculates a normal to the trajectory respectively for a plurality of points under consideration positioned on the trajectory of an object in a space set on an inspection object, calculates the position of the X-ray source 3 corresponding to the points under consideration on the basis of the calculated normal, sets the respective positions of the plurality of X-ray sources 3 on the trajectory near the position of the X-ray source 3 corresponding to the points under consideration, and for data acquired from the detector 4 when being at a position facing the set position of the X-ray source 3, acquires a tomographic image by extracting a prescribed part where the normal passes through from the data, and generates a first panoramic image by sticking the acquired tomographic images together on the basis of the positions of the points under consideration.
COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：解决问题的方法为了提供能够通过使X射线源和检测器以简单的圆形轨迹移动来获得优异的全景图像的X射线测量装置，X射线测量方法和X射线测量方法，射线测量程序。解决方案：X射线源3和检测器4彼此面对。控制处理器8针对位于检查对象上的空间中的物体的轨迹上的被考虑的多个点分别计算轨迹的法线，计算与所考虑点对应的X射线源3的位置基于计算出的正常值，将多个X射线源3的各个位置设置在与所考虑的点对应的X射线源3的位置附近的轨迹上，并且对于从检测器4获取的数据，在与X射线源3的设定位置相对的位置处，通过从数据中提取正常通过的规定部分来取得断层图像，并且通过将获取的断层图像粘贴在一起而生成第一全景图像所考虑的要点的位置。版权所有（C）2007，JPO＆INPIT

6. 发明专利

JP2004357969A X-ray measuring instrument 有权
公开(公告)号：JP2004357969A
公开(公告)日：2004-12-24
申请号：JP2003160417
申请日：2003-06-05
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 provide a three-dimensional X-ray measuring instrument enabling a good measurement with respect to a subject having a high X-ray absorber.
SOLUTION: This X-ray measuring instrument has a means for performing a first reconstitution processing (104) using projection data (103), a means (106) for carrying out an extraction processing of a value larger than a threshold value in reconstitution data (105), a means (107) for performing a re-projection processing (108) of a re-projection data from the extracted reconstitution data, a means (109) for subjecting the re-projection data (108) to a secondary conversion processing, a means for multiplying the secondarily converted re-projection data (110) by a weight coefficient, a means (111) for subjecting the weighted re-projection data to a differential processing from the projection data, and a means for performing a second reconstitution processing (113) using the differential re-projection data (112).
COPYRIGHT: (C)2005,JPO&NCIPI

7. 发明专利

JP2003052687A X-ray inspection system 有权
标题翻译： X射线检测系统
公开(公告)号：JP2003052687A
公开(公告)日：2003-02-25
申请号：JP2001246399
申请日：2001-08-15
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： G01T1/00 , A61B6/03 , G01T1/17 , G01T7/00 , G06T1/00 , G06T5/00 , H04N1/407 , H04N7/18
摘要： PROBLEM TO BE SOLVED: To provide an X-ray inspection system which carries out the correction of sensitivity, dependence on the size of subjects to be examined and remaining images. SOLUTION: A data processor (1) calculates the attenuation ratios r of the remaining images per measuring time of one transmission X-ray image and subtracts (104) a value, obtained by multiplying output signals of the measurement made once preceding the present measurement by r from the value, obtained by multiplying the output signals of the present measurement by (1+r) and a sensitivity correction term for correcting the sensitivity of the X-ray inspection system as a whole is (2) calculated using measuring conditions of transmission X-ray images determined by operation conditions of an X-ray generator and operation conditions of the X-ray inspection system. The results obtained by the division of the results of the arithmetic processing (1) by the sensitivity correction term undergo an exponential conversion (107) or the sensitivity correction term subjected to the exponential conversion are subtracted from the results of the arithmetic processing (1) to (3) calculate a size depending correction term indicating changes in energy distribution depending on the sizes of the subjects to be examined. Then, the results of the arithmetic processing (2) are multiplied by the size depending correction term (108) to obtain an image 113 processed for correction.
摘要翻译：要解决的问题：提供一种执行灵敏度校正的X射线检查系统，依赖于被检查对象的大小和剩余图像。解决方案：数据处理器（1）计算一个透射X射线图像的每个测量时间的剩余图像的衰减率r，并且减去（104）通过将本次测量之前进行的测量的输出信号乘以本通过将本测量的输出信号乘以（1 + r）获得的值和用于校正X射线检查系统的灵敏度的灵敏度校正项作为整体的值为（2），使用测量条件由X射线发生器的操作条件和X射线检查系统的操作条件确定的X射线图像。通过将灵敏度校正项除以运算处理（1）的结果而得到的结果经历指数变换（107），或者从算术处理（1）的结果中减去经过指数变换的灵敏度校正项，至（3）根据要检查的对象的大小计算指示能量分布变化的修正项的大小。然后，将算术处理（2）的结果乘以尺寸依赖性校正项（108），以获得处理以进行校正的图像113。

8. 发明专利

JP2003033348A Three dimensional x-ray ct scanner 审中-公开
标题翻译：三维X射线CT扫描仪
公开(公告)号：JP2003033348A
公开(公告)日：2003-02-04
申请号：JP2001220092
申请日：2001-07-19
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 a three dimensional X-ray CT scanner capable of reducing artifacts of a reconfigured image even if a broad field of view is configured by arranging a plurality of two dimensional X-ray detectors in parallel.
SOLUTION: In the three dimensional X-ray CT scanner, a sensitivity correction means 202, which corrects the output characteristic difference between the plurality of two dimensional X-ray detection means and read-out means is arranged and a three dimension X-ray image of a body to be inspected is reconstructed by inputting an X-ray detection data corrected with the sensitivity correction means into a three dimensional reconstruction means. The sensitivity correction means calculates a relative sensibility using the values of several pixels near the boundary of the detection area of which the plurality of two dimensional X-ray detection means and the read-out means take charge.
COPYRIGHT: (C)2003,JPO
摘要翻译：要解决的问题：即使通过并行布置多个二维X射线检测器来配置宽视野，也能够提供能够减少重构图像的伪影的三维X射线CT扫描仪。解决方案：在三维X射线CT扫描仪中，设置校正多个二维X射线检测装置和读出装置之间的输出特性差的灵敏度校正装置202，并且配置三维X射线图像通过将用灵敏度校正装置校正的X射线检测数据输入到三维重建装置中来重构待检查的身体。灵敏度校正装置使用多个二维X射线检测装置和读出装置负责的检测区域的边界附近的几个像素的值来计算相对感光度。

9. 发明专利

JP2009279301A Cone beam x-ray ct system 审中-公开
标题翻译： CONE光束X射线CT系统
公开(公告)号：JP2009279301A
公开(公告)日：2009-12-03
申请号：JP2008136415
申请日：2008-05-26
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 , G06T1/00
摘要： PROBLEM TO BE SOLVED: To provide a tomographic image the picture quality level of which is uniform while suppressing the generation of artifacts in a CT system equipped with a rectangular two-dimensional X-ray detector.
SOLUTION: The radius and the height of a desired cylindrical reconstruction region are input by a reconstruction region inputting means 310. A reconstruction-expanded-region calculating means 320 calculates the amount of expansion of the reconstruction region on the basis of the reconstruction region having been input and a region for which the projection data in a viewing direction are not complete. A mean for calculating the amount of expansion in a vertical direction of projection data 330 forms expanded projection data corresponding to the expanded amount of the reconstruction region by extrapolating or copying the projection data, and performs the reconstruction by using the expanded projection data and the projection data.
COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：要解决的问题：提供其图像质量水平是均匀的断层图像，同时抑制装备有矩形二维X射线检测器的CT系统中的伪像的产生。解决方案：所需圆柱形重构区域的半径和高度由重建区域输入装置310输入。重建扩展区域计算装置320基于重建来计算重建区域的扩展量输入区域和观察方向上的投影数据未完成的区域。用于计算投影数据330的垂直方向的扩展量的平均值通过外推或复制投影数据来形成对应于重建区域的扩展量的扩展投影数据，并且通过使用扩展的投影数据和投影来执行重建数据。版权所有（C）2010，JPO＆INPIT

10. 发明专利

JP2008125688A X-ray ct apparatus 有权
标题翻译： X射线CT装置
公开(公告)号：JP2008125688A
公开(公告)日：2008-06-05
申请号：JP2006312353
申请日：2006-11-20
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 , G06T1/00
摘要： PROBLEM TO BE SOLVED: To provide an X-ray CT apparatus which avoids an increase in calculation time and provides a cross sectional image with reduced radial artifacts.
SOLUTION: The X-ray CT apparatus is equipped with: an X-ray source for irradiating an subject with X-rays; a two-dimensional X-ray detector which is disposed opposite to the X-ray source with the subject therebetween and detects the transmitted X-rays of the subject; a rotation means for rotating the X-ray source and the two-dimensional X-ray detector around the subject while keeping them face each other; an image reconstitution means for generating X-ray CT cross sectional images from X-ray image data from the two-dimensional X-ray detector; an addition means for adding the generated first X-ray CT cross sectional image and a second X-ray CT cross sectional image obtained by rotating the rotation means for a prescribed angle; and a display means for displaying the added X-ray CT cross sectional image.
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：提供一种避免计算时间增加并提供具有减小的放射状伪影的横截面图像的X射线CT装置。解决方案：X射线CT装置配备有用于对X射线照射的X射线源; 二维X射线检测器，其与被检体的X射线源相对设置，并检测被检体的透射X射线; 旋转装置，用于使X射线源和二维X射线检测器围绕对象旋转，同时保持它们彼此面对; 图像重构装置，用于从来自二维X射线检测器的X射线图像数据产生X射线CT横截面图像; 添加装置，用于将产生的第一X射线CT横截面图像和通过使旋转装置旋转预定角度而获得的第二X射线CT横截面图像; 以及显示装置，用于显示所添加的X射线CT横截面图像。版权所有（C）2008，JPO＆INPIT

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