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21. 发明授权

US07639776B2 X-ray CT apparatus 有权
标题翻译： X射线CT装置
公开(公告)号：US07639776B2
公开(公告)日：2009-12-29
申请号：US11757732
申请日：2007-06-04
申请人： Makoto Gohno , Tetsuya Horiuchi , Akihiko Nishide , Akira Hagiwara
发明人： Makoto Gohno , Tetsuya Horiuchi , Akihiko Nishide , Akira Hagiwara
IPC分类号： A61B6/00
CPC分类号： A61B6/032 , A61B6/027 , A61B6/488 , A61B6/542 , H05G1/30
摘要： The present invention aims to obtain a tomographic image similar in image quality to a tomographic image obtained by executing a scan at X-ray tube current value set by an X-ray automatic exposure function even when the X-ray tube current value set by the X-ray automatic exposure function are not within a standard range of the X-ray tube current values settable at the X-ray tube (21). X-ray tube current value supplied to the X-ray tube (21) are set by the X-ray automatic exposure function. Thereafter, when the X-ray tube current value set by the X-ray automatic exposure function is not within in the standard range of the X-ray tube current value settable at the X-ray tube, the X-ray tube current value at a portion not within the standard range are changed so as to be within the standard range, and the set value of helical pitch is changed so as to correspond to the ratio between the pre-changed x-ray tube current value and the post-changed X-ray tube current value.
摘要翻译：本发明的目的在于获得与通过由X射线自动曝光功能设定的X射线管电流值执行扫描而获得的断层图像相似的断层图像，即使当由X射线管电流值 X射线自动曝光功能不在X射线管（21）可设定的X射线管电流值的标准范围内。通过X射线自动曝光功能设定供给X射线管（21）的X射线管电流值。此后，当通过X射线自动曝光功能设定的X射线管电流值不在可设置在X射线管的X射线管电流值的标准范围内时，X射线管电流值在不在标准范围内的部分被改变为在标准范围内，并且改变螺距的设定值，以便对应于预先改变的X射线管电流值和后变化的X射线管电流值之间的比率 X射线管电流值。

22. 发明授权

US07492854B2 X-ray CT imaging method and X-ray CT apparatus 有权
标题翻译： X射线CT成像方法和X射线CT装置
公开(公告)号：US07492854B2
公开(公告)日：2009-02-17
申请号：US11557716
申请日：2006-11-08
申请人： Akihiko Nishide , Akira Hagiwara
发明人： Akihiko Nishide , Akira Hagiwara
IPC分类号： G01N23/00
CPC分类号： G01N23/046 , A61B6/027 , A61B6/032 , A61B6/4085 , A61B6/488 , A61B6/5258 , A61B6/583 , G01N2223/419 , G01N2223/612 , G06T11/005 , G06T11/006 , G06T2211/421
摘要： The present invention provides the adjustment of CT value which is the pixel value of a tomographic image in the conventional scan (axial scan) or cinescan or helical scan by an X-ray CT apparatus incorporating a multi column X-ray detector or a two-dimensional X-ray detector of matrix arrangement represented by a flat panel X-ray detector. The gain and bias of the projection data of each row are adjusted prior to the three-dimensional back projection or prior to the reconstruction function convolution. Alternatively, the gain and bias are adjusted after determining the gain and bias value to adjust the CT value by taking into account the contribution rate of each row to the tomographic image after the three-dimensional back projection. Alternatively, the gain and bias are adjusted after determining the gain and bias value to adjust CT value by taking into account the contribution rate of each row to the tomographic image relying on the position of each row in z direction in case of axial scan after three-dimensional back projection.
摘要翻译：本发明提供了CT值的调整，CT值是通过包含多列X射线检测器或双列X射线检测器的X射线CT装置的常规扫描（轴向扫描）或电脑扫描或螺旋扫描中的断层图像的像素值，由平板X射线检测器表示的矩阵排列的二维X射线检测器。每个行的投影数据的增益和偏置在三维反投影之前或在重建函数卷积之前进行调整。或者，在确定增益和偏置值之后调整增益和偏差，以通过考虑每行对三维背投影之后的断层图像的贡献率来调整CT值。或者，在确定增益和偏置值之后调整增益和偏差以通过考虑每个行对断层图像的贡献率来调整CT值，依赖于在三维轴向扫描之后的z行方向上的每行的位置三维反投影。

23. 发明申请

US20070172104A1 IMAGE DISPLAY APPARATUS AND X-RAY CT APPARATUS 有权
标题翻译：图像显示装置和X射线CT装置
公开(公告)号：US20070172104A1
公开(公告)日：2007-07-26
申请号：US11619242
申请日：2007-01-03
申请人： Akihiko Nishide , Akira Hagiwara
发明人： Akihiko Nishide , Akira Hagiwara
IPC分类号： G06K9/00
CPC分类号： G06T5/002 , A61B6/027 , A61B6/032 , A61B6/4085 , G06T11/008 , G06T2207/10081 , G06T2207/20012 , G06T2207/30004
摘要： The present invention aims to realize an improvement in image quality of a two-dimensional display extracted from a three-dimensional display image such as continuous tomographic images which tomographic images at a conventional scan or the like of an X-ray CT apparatus having a two-dimensional X-ray area detector of a matrix structure typified by a multi-row X-ray detector or a flat panel X-ray detector are arranged in a z direction corresponding to an imaging table travel direction. For the purpose, an image display apparatus of the present invention comprises image filter processing device for preforming a image filter processing on the three-dimensional image, wherein said image filter process varies depending on a cross sectional direction of said two-dimensional image to be displayed.
摘要翻译：本发明旨在实现从三维显示图像提取的二维显示图像质量的提高，所述三维显示图像例如是具有两个X射线CT装置的常规扫描等的断层图像的连续断层图像以X射线检测器或平板X射线检测器为代表的矩阵结构的X维面积检测器以对应于成像台行进方向的方向配置。为此，本发明的图像显示装置包括用于对三维图像进行图像滤波处理的图像滤波处理装置，其中所述图像滤波处理根据所述二维图像的横截面方向而变化，显示。

24. 发明申请

US20070110209A1 X-RAY CT IMAGING METHOD AND X-RAY CT APPARATUS 有权
标题翻译： X射线CT成像方法和X射线CT装置
公开(公告)号：US20070110209A1
公开(公告)日：2007-05-17
申请号：US11557716
申请日：2006-11-08
申请人： Akihiko Nishide , Akira Hagiwara
发明人： Akihiko Nishide , Akira Hagiwara
IPC分类号： H05G1/60 , A61B6/00 , G01N23/00 , G21K1/12
CPC分类号： G01N23/046 , A61B6/027 , A61B6/032 , A61B6/4085 , A61B6/488 , A61B6/5258 , A61B6/583 , G01N2223/419 , G01N2223/612 , G06T11/005 , G06T11/006 , G06T2211/421
摘要： The present invention provides the adjustment of CT value which is the pixel value of a tomographic image in the conventional scan (axial scan) or cinescan or helical scan by an X-ray CT apparatus incorporating a multi column X-ray detector or a two-dimensional X-ray detector of matrix arrangement represented by a flat panel X-ray detector. The gain and bias of the projection data of each row are adjusted prior to the three-dimensional back projection or prior to the reconstruction function convolution. Alternatively, the gain and bias are adjusted after determining the gain and bias value to adjust the CT value by taking into account the contribution rate of each row to the tomographic image after the three-dimensional back projection. Alternatively, the gain and bias are adjusted after determining the gain and bias value to adjust CT value by taking into account the contribution rate of each row to the tomographic image relying on the position of each row in z direction in case of axial scan after three-dimensional back projection.
摘要翻译：本发明提供了CT值的调整，CT值是通过包含多列X射线检测器或双列X射线检测器的X射线CT装置的常规扫描（轴向扫描）或电脑扫描或螺旋扫描中的断层图像的像素值，由平板X射线检测器表示的矩阵排列的二维X射线检测器。每个行的投影数据的增益和偏置在三维反投影之前或在重建函数卷积之前进行调整。或者，在确定增益和偏置值之后调整增益和偏差，以通过考虑每行对三维背投影之后的断层图像的贡献率来调整CT值。或者，在确定增益和偏置值之后调整增益和偏差以通过考虑每个行对断层图像的贡献率来调整CT值，依赖于在三维轴向扫描之后的z行方向上的每行的位置三维反投影。

25. 发明申请

US20070019851A1 Image processing apparatus and X-ray CT apparatus 审中-公开
标题翻译：图像处理装置和X射线CT装置
公开(公告)号：US20070019851A1
公开(公告)日：2007-01-25
申请号：US11489969
申请日：2006-07-20
申请人： Akihiko Nishide , Akira Hagiwara , Tetsuya Horiuchi
发明人： Akihiko Nishide , Akira Hagiwara , Tetsuya Horiuchi
IPC分类号： G06K9/00
CPC分类号： G06T11/005 , A61B6/027 , G06T2211/412
摘要： The present invention is intended to improve the quality of a four-dimensional image that is a time-varying three-dimensional image. The four-dimensional image that is a time-varying three-dimensional image is spatially filtered in the direction of a time axis and the directions of spatial axes alike.
摘要翻译：本发明旨在提高作为时变三维图像的四维图像的质量。作为时变三维图像的四维图像在时间轴的方向和空间轴的方向上进行空间滤波。

26. 发明授权

US08009890B2 Image display apparatus and X-ray CT apparatus 有权
标题翻译：图像显示装置和X射线CT装置
公开(公告)号：US08009890B2
公开(公告)日：2011-08-30
申请号：US11619242
申请日：2007-01-03
申请人： Akihiko Nishide , Akira Hagiwara
发明人： Akihiko Nishide , Akira Hagiwara
IPC分类号： G06K9/00
CPC分类号： G06T5/002 , A61B6/027 , A61B6/032 , A61B6/4085 , G06T11/008 , G06T2207/10081 , G06T2207/20012 , G06T2207/30004
摘要： The present invention aims to realize an improvement in image quality of a two-dimensional display extracted from a three-dimensional display image such as continuous tomographic images which tomographic images at a conventional scan or the like of an X-ray CT apparatus having a two-dimensional X-ray area detector of a matrix structure typified by a multi-row X-ray detector or a flat panel X-ray detector are arranged in a z direction corresponding to an imaging table travel direction. For the purpose, an image display apparatus of the present invention comprises image filter processing device for preforming a image filter processing on the three-dimensional image, wherein said image filter process varies depending on a cross sectional direction of said two-dimensional image to be displayed.
摘要翻译：本发明旨在实现从三维显示图像提取的二维显示图像质量的提高，所述三维显示图像例如是具有两个X射线CT装置的常规扫描等的断层图像的连续断层图像以X射线检测器或平板X射线检测器为代表的矩阵结构的X维面积检测器以对应于成像台行进方向的方向配置。为此，本发明的图像显示装置包括用于对三维图像进行图像滤波处理的图像滤波处理装置，其中所述图像滤波处理根据所述二维图像的横截面方向而变化，显示。

27. 发明授权

US07606345B2 X-ray CT apparatus 有权
标题翻译： X射线CT装置
公开(公告)号：US07606345B2
公开(公告)日：2009-10-20
申请号：US12241647
申请日：2008-09-30
申请人： Akihiko Nishide , Ryosuke Fujimoto , Kenichi Nishizawa , Akira Hagiwara
发明人： Akihiko Nishide , Ryosuke Fujimoto , Kenichi Nishizawa , Akira Hagiwara
IPC分类号： A61B6/00
CPC分类号： A61B6/542 , A61B6/027 , A61B6/032 , Y10S378/901
摘要： An X-ray CT apparatus enables decreasing the degradation of image quality and reducing futile exposure to X-ray in a helical shuttle scan. The X-ray CT apparatus comprises: a gantry rotating device having an X-ray generator for generating the X-ray and an X-ray detector for detecting the generated X-ray and transmitted through a subject; a gantry controller for performing the helical shuttle scan by reciprocally moving the gantry rotating device and the cradle; a scan condition setting device for setting the scan condition of the helical shuttle scan in a predetermined range in the direction of body axis of the subject; an X-ray projection data acquisition device for acquiring the X-ray projection data; a scan controller for controlling the scan as specified in the scan condition; and a image reconstruction device for performing the image reconstruction processing based on the X-ray projection data.
摘要翻译： X射线CT装置能够降低图像质量的降低并减少在螺旋穿梭扫描中对X射线的无效暴露。 X射线CT装置包括：具有用于产生X射线的X射线发生器的台架旋转装置和用于检测所产生的X射线并透过对象的X射线检测器; 台架控制器，用于通过往复地移动所述台架旋转装置和所述支架进行螺旋穿梭扫描; 扫描条件设定装置，用于将螺旋穿梭扫描的扫描条件设定在被检体的体轴方向的规定范围内; 用于获取X射线投影数据的X射线投影数据获取装置; 扫描控制器，用于根据扫描条件指定扫描; 以及图像重建装置，用于基于X射线投影数据执行图像重建处理。

28. 发明申请

US20090092224A1 X-RAY CT APPARATUS 有权
标题翻译： X射线CT装置
公开(公告)号：US20090092224A1
公开(公告)日：2009-04-09
申请号：US12241647
申请日：2008-09-30
申请人： Akihiko Nishide , Ryosuke Fujimoto , Kenichi Nishizawa , Akira Hagiwara
发明人： Akihiko Nishide , Ryosuke Fujimoto , Kenichi Nishizawa , Akira Hagiwara
IPC分类号： A61B6/00
CPC分类号： A61B6/542 , A61B6/027 , A61B6/032 , Y10S378/901
摘要： An X-ray CT apparatus enables decreasing the degradation of image quality and reducing futile exposure to X-ray in a helical shuttle scan. The X-ray CT apparatus comprises: a gantry rotating device having an X-ray generator for generating the X-ray and an X-ray detector for detecting the generated X-ray and transmitted through a subject; a gantry controller for performing the helical shuttle scan by reciprocally moving the gantry rotating device and the cradle; a scan condition setting device for setting the scan condition of the helical shuttle scan in a predetermined range in the direction of body axis of the subject; an X-ray projection data acquisition device for acquiring the X-ray projection data; a scan controller for controlling the scan as specified in the scan condition; and a image reconstruction device for performing the image reconstruction processing based on the X-ray projection data.
摘要翻译： X射线CT装置能够降低图像质量的降低并减少在螺旋穿梭扫描中对X射线的无效暴露。 X射线CT装置包括：具有用于产生X射线的X射线发生器的台架旋转装置和用于检测所产生的X射线并透过被检体的X射线检测器; 台架控制器，用于通过往复地移动所述台架旋转装置和所述支架进行螺旋穿梭扫描; 扫描条件设定装置，用于将螺旋穿梭扫描的扫描条件设定在被检体的体轴方向的规定范围内; 用于获取X射线投影数据的X射线投影数据获取装置; 扫描控制器，用于根据扫描条件指定扫描; 以及图像重建装置，用于基于X射线投影数据执行图像重建处理。

29. 发明授权

US07522697B2 X-ray CT apparatus 失效
标题翻译： X射线CT装置
公开(公告)号：US07522697B2
公开(公告)日：2009-04-21
申请号：US11680404
申请日：2007-02-28
申请人： Yusuke Satta , Kazuhiko Sato , Akihiko Nishide , Akira Hagiwara
发明人： Yusuke Satta , Kazuhiko Sato , Akihiko Nishide , Akira Hagiwara
IPC分类号： G21K1/12
CPC分类号： G06T11/006 , A61B6/027 , A61B6/032 , A61B6/0457 , G06T2211/421
摘要： The present invention is to easily associate X-ray projection data and scanning table z-direction coordinate information with each other. Using set parameters of the operations of a scanning gantry and a scanning table, the association of the X-ray projection data and scanning table z-direction coordinate information with each other is executed. Thereafter, image reconstruction is carried out based on the X-ray projection data to obtain a tomographic image. The operation set parameters are stored as part of the X-ray projection data. Alternatively, they are collectively stored even in the case of files separate from the X-ray projection data.
摘要翻译：本发明能够容易地将X射线投影数据和扫描表z方向坐标信息相互关联。使用扫描台架和扫描台的操作的设定参数，执行X射线投影数据和扫描台z方向坐标信息的关联。此后，基于X射线投影数据进行图像重建以获得断层图像。操作设置参数作为X射线投影数据的一部分存储。或者，即使在与X射线投影数据分离的文件的情况下也集体存储。

30. 发明授权

US07379526B2 X-ray CT apparatus and X-ray CT imaging method 失效
标题翻译： X射线CT装置和X线CT成像方法
公开(公告)号：US07379526B2
公开(公告)日：2008-05-27
申请号：US11266534
申请日：2005-11-03
申请人： Akihiko Nishide , Akira Hagiwara
发明人： Akihiko Nishide , Akira Hagiwara
IPC分类号： G01N23/00
CPC分类号： A61B6/032 , A61B6/027 , G01N23/046 , G01N2223/419
摘要： The present invention aims to reduce exposure at a helical scan in an X-ray CT apparatus using an X-ray area detector typified by a multi-row X-ray detector or a flat panel. When the angle of an X-ray cone beam spread in a z direction is assumed to be Acone, a scanning gantry is tilted by Acone/2 to start X-ray irradiation/data acquisition of the helical scan, after which the X-ray irradiation/data acquisition is completed at the number of revolutions corresponding to “integral number n+0.5”.
摘要翻译：本发明的目的是在X射线CT装置的螺旋扫描下，使用以X射线检测器或平板为代表的X射线检测区域进行检测。当假定以az方向扩展的X射线锥形束的角度为Acone时，扫描台架被Acone / 2倾斜以开始X射线照射/数据采集螺旋扫描，之后进行X射线照射 /数据采集以对应于“积分数n + 0.5”的转数完成。

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