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公开(公告)号：US20120069950A1
公开(公告)日：2012-03-22
申请号：US13233071
申请日：2011-09-15
CPC分类号： G01N23/04 , A61B6/02 , A61B6/032 , A61B6/4021 , G01N2223/1016 , G01N2223/414
摘要： A method and an X-ray device are disclosed for creating an X-ray projection image of a three-dimensional object under examination and for displaying the projection image. In at least one embodiment, pixel images are recorded from two different perspectives and a projection image is created by overlaying the two pixel images, wherein perspective-related offset of the mapping image pixels is taken into account, pixel-by-pixel, in relation to an imaging surface in the object under examination.
摘要翻译： 公开了一种用于创建被检查的三维物体的X射线投影图像并用于显示投影图像的方法和X射线装置。 在至少一个实施例中，从两个不同的角度记录像素图像，并且通过重叠两个像素图像来创建投影图像，其中映射图像像素的透视相关偏移被逐个像素地考虑在内 到被检查物体中的成像表面。
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公开(公告)号：US08005287B2
公开(公告)日：2011-08-23
申请号：US12457972
申请日：2009-06-26
CPC分类号： G06T11/006 , G06T2211/424
摘要： A method is disclosed for reconstructing CT image data. In at least one embodiment, the method includes providing measured CT projection data p based on the CT projection data p, reconstructing first CT image data fk=1, and on the basis of the first image data fk=1 iteratively generating k+1-th CT-image data according to the formula: fk+1=fk−α(Q(Pfk−p)+βR(fk)) until the standard ∥fk+1−fk∥2 is ≦n, with the reconstruction operator Q containing a noise weighting according to Q=B·Wstatist.·H. Aside from suppressing “cone” artifacts, the proposed method of at least one embodiment indicates a significant reduction in the image noise even after a few iterations.
摘要翻译： 公开了一种重建CT图像数据的方法。 在至少一个实施例中，该方法包括基于CT投影数据p提供测量的CT投影数据p，重建第一CT图像数据fk = 1，并且基于第一图像数据fk = 1迭代地生成k + 根据以下公式计算CT图像数据：fk + 1 = fk-α（Q（Pfk-p）+＆bgr; R（fk）），直到标准∥fk+ 1-fk‖2为＆nlE; n， 重构算子Q根据Q = B·Wstatist包含噪声加权。 除了抑制“锥形”伪像之外，至少一个实施例的所提出的方法指示即使在几次迭代之后图像噪声也显着降低。
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3.发明申请X-Ray System for the Creation of Diagnostic X-Ray Images Using Contrast Media 有权用于使用对比度媒体创建诊断X射线图像的X射线系统公开(公告)号：US20080310582A1
公开(公告)日：2008-12-18
申请号：US12084259
申请日：2006-10-25
申请人： Thomas Flohr , Michael Grasruck , Hubertus Pietsch , Karl Stierstorfer , Christoph Suss , Hanns-Joachim Weinmann
发明人： Thomas Flohr , Michael Grasruck , Hubertus Pietsch , Karl Stierstorfer , Christoph Suss , Hanns-Joachim Weinmann
IPC分类号： A61B6/03
CPC分类号： A61K49/04 , A61B5/1075 , A61B6/032 , A61B6/06 , A61B6/4014 , A61B6/4035 , A61B6/4241 , A61B6/4266 , A61B6/4441 , A61B6/481 , A61B6/482 , A61B6/488 , A61B6/504 , A61B6/542 , A61B6/545 , A61B6/583
摘要： An x-ray system is disclosed including a selector for finding an optimum combination between the contrast medium and the energy spectrum of an x-radiation for a scan to optimize the noise-to-contrast ratio. A method for creating X-ray images is also provided. The x-ray images are created with the aid of contrast media by taking into account an optimal combination between the contrast medium and the energy spectrum of an X-radiation used for a scan. A method for the use of a lanthanide-containing complex to produce a contrast medium for optimizing the combination between the contrast medium and the radiation to obtain a maximum contrast-to-noise ratio in an X-ray image is also provided.
摘要翻译： 公开了一种X射线系统，其包括用于找到造影剂与用于扫描的x辐射的能谱之间的最佳组合的选择器，以优化噪声对比度。 还提供了一种用于创建X射线图像的方法。 通过考虑造影介质和用于扫描的X射线的能谱之间的最佳组合，借助造影剂创建X射线图像。 还提供了一种使用含镧系元素的络合物以产生用于优化造影剂和辐射之间的组合以在X射线图像中获得最大对比噪声比的造影剂的方法。
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4.发明申请Method and device for segmenting at least one substance in an x-ray image 有权用于在x射线图像中分割至少一种物质的方法和装置公开(公告)号：US20070092127A1
公开(公告)日：2007-04-26
申请号：US11581149
申请日：2006-10-16
CPC分类号： G06T5/50 , G06T7/11 , G06T7/136 , G06T2207/10081 , G06T2207/30004
摘要： A method is disclosed for generating CT displays in x-ray computed tomography with contrast medium support, the blooming effect being reduced by decomposing an object into three material components when scanning the object with two different energy spectra, and determining a first component and determining the material thickness thereof by segmentation. Subsequently, in at least one embodiment, the two other material components and their material thicknesses are determined on the basis of the measured attenuation values of the two spectra for each beam, and virtual absorption data with virtual absorption coefficients are constructed for the individual material components from the material strengths thus known for the different material components, and are used to reconstruct the CT display.
摘要翻译： 公开了一种用于在具有造影介质支持的x射线计算机断层摄影中生成CT显示器的方法，通过在用两个不同的能量谱扫描物体时将物体分解为三个材料成分，并且确定第一成分并确定 材料厚度通过分割。 随后，在至少一个实施例中，基于每个光束的两个光谱的测量衰减值来确定两个其它材料部件及其材料厚度，并且为各个材料部件构造具有虚拟吸收系数的虚拟吸收数据 从对于不同材料组分而言已知的材料强度，并用于重建CT显示。
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公开(公告)号：US20090324045A1
公开(公告)日：2009-12-31
申请号：US12457972
申请日：2009-06-26
IPC分类号： G06K9/00
CPC分类号： G06T11/006 , G06T2211/424
摘要： A method is disclosed for reconstructing CT image data. In at least one embodiment, the method includes providing measured CT projection data p based on the CT projection data p, reconstructing first CT image data fk=1, and on the basis of the first image data fk=1 iteratively generating k+1-th CT-image data according to the formula: fk+1=fk−α(Q(Pfk−p)+βR(fk)) until the standard ∥fk+1−fk∥2 is ≦n, with the reconstruction operator Q containing a noise weighting according to Q=B·Wstatist.·H. Aside from suppressing “cone” artifacts, the proposed method of at least one embodiment indicates a significant reduction in the image noise even after a few iterations.
摘要翻译： 公开了一种重建CT图像数据的方法。 在至少一个实施例中，该方法包括基于CT投影数据p提供测量的CT投影数据p，重建第一CT图像数据fk = 1，并且基于第一图像数据fk = 1迭代地生成k + 直到标准∥fk+ 1-fk‖2为<= n，与重建算子相对应，根据以下公式fk + 1 = fk-α（Q（Pfk-p）+βR（fk））的CT图像数据 Q包含根据Q = B.Wstatist..H的噪声加权。 除了抑制“锥形”伪像之外，至少一个实施例的所提出的方法指示即使在几次迭代之后图像噪声也显着降低。
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6.发明申请Method for calculating absorber-specific weighting coefficients and method for improving a contrast-to-noise ratio, dependent on an absorber, in an x-ray image, produced by an x-ray machine, of an object to be examined 审中-公开用于计算吸收体专用加权系数的方法和方法，用于提高取决于由x射线机产生的x射线图像中的待检测物体的X射线图像中的吸收体的对比度噪声比公开(公告)号：US20060280281A1
公开(公告)日：2006-12-14
申请号：US11451581
申请日：2006-06-13
CPC分类号： A61B6/482 , A61B6/4241 , A61B6/504 , A61B6/505
摘要： A method is disclosed for calculating absorber-specific weighting coefficients and a method is disclosed for improving a contrast-to-noise ratio, dependent on an absorber, in an x-ray image of an object to be examined produced by an x-ray machine. A weighted summation of detector output signals from different energy windows of an energy-selector detector are used to improve the contrast-to-noise ratio as a function of the absorber.
摘要翻译： 公开了一种用于计算吸收体特定加权系数的方法，并且公开了一种用于在X射线机产生的待检测物体的X射线图像中提高取决于吸收体的对比度噪声比的方法 。 使用来自能量选择器检测器的不同能量窗口的检测器输出信号的加权求和来提高作为吸收器的函数的对比噪声比。
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7.发明授权Method and device for segmenting at least one substance in an x-ray image 有权用于在x射线图像中分割至少一种物质的方法和装置公开(公告)号：US07903860B2
公开(公告)日：2011-03-08
申请号：US11581149
申请日：2006-10-16
IPC分类号： G06K9/56
CPC分类号： G06T5/50 , G06T7/11 , G06T7/136 , G06T2207/10081 , G06T2207/30004
摘要： A method and a device are disclosed for segmenting at least one substance in an x-ray image. In at least one embodiment of the method, two attenuation values relating to different energies of an x-radiation are acquired in relation to each pixel. The pixels are mapped into a two-dimensional feature space on the basis of the acquired attenuation values, and there is subsequently determined as assessment variable from the mapping of an image environment respectively assigned to the pixels the number of those pixels that fall in a classification region assigned to the substance. It is then possible to calculate in a simple way on the basis of the assessment variable a segmented image that contains the substance and in which misclassification can largely be avoided by taking account of the neighborhood relationship of the pixels.
摘要翻译： 公开了用于在x射线图像中分割至少一种物质的方法和装置。 在该方法的至少一个实施例中，相对于每个像素获取与x辐射的不同能量相关的两个衰减值。 基于所获取的衰减值将像素映射到二维特征空间中，并且随后根据分别分配给像素的图像环境的映射确定为评估变量，这些像素属于分类中的那些像素的数量 分配给物质的区域。 然后可以以简单的方式计算包含物质的分割图像的评估变量，并且通过考虑像素的邻域关系可以在很大程度上避免误分类。
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公开(公告)号：US07840043B2
公开(公告)日：2010-11-23
申请号：US11499662
申请日：2006-08-07
IPC分类号： G06K9/00
CPC分类号： G01N23/046 , A61B6/032 , A61B6/405 , A61B6/482 , G01N2223/419
摘要： A method is for determining a parameter in an image area as a measure of a homogeneity of a substance in an object, and to a method for segmenting a substance in an image that uses the parameter as an additional segmentation criterion. In the method, at least two X-ray images are acquired in relation to different energies E1, E2 of an X-radiation, and the parameter is determined from the statistical distribution of attenuation values Di(E1),Di(E2) where i=1, . . . , N in the image area such that faulty classifications can be avoided in a simple way during the segmentation.
摘要翻译： 一种用于确定图像区域中的参数作为物体中物质的均匀度的量度的方法，以及用于将使用该参数的图像中的物质分割为附加分割标准的方法。 在该方法中，相对于X射线的不同能量E1，E2获取至少两个X射线图像，并且根据衰减值Di（E1），Di（E2）的统计分布来确定参数，其中i = 1，。 。 。 ，N，使得在分割期间可以以简单的方式避免错误的分类。
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9.发明授权X-ray system for the creation of diagnostic X-ray images using contrast media 有权X射线系统用于使用造影剂创建诊断X射线图像公开(公告)号：US07695193B2
公开(公告)日：2010-04-13
申请号：US12084259
申请日：2006-10-25
申请人： Thomas Flohr , Michael Grasruck , Hubertus Pietsch , Karl Stierstorfer , Christoph Suss , Hanns-Joachim Weinmann
发明人： Thomas Flohr , Michael Grasruck , Hubertus Pietsch , Karl Stierstorfer , Christoph Suss , Hanns-Joachim Weinmann
IPC分类号： G01D18/00
CPC分类号： A61K49/04 , A61B5/1075 , A61B6/032 , A61B6/06 , A61B6/4014 , A61B6/4035 , A61B6/4241 , A61B6/4266 , A61B6/4441 , A61B6/481 , A61B6/482 , A61B6/488 , A61B6/504 , A61B6/542 , A61B6/545 , A61B6/583
摘要： An x-ray system is disclosed including a selector for finding an optimum combination between the contrast medium and the energy spectrum of an x-radiation for a scan to optimize the noise-to-contrast ratio. A method for creating X-ray images is also provided. The x-ray images are created with the aid of contrast media by taking into account an optimal combination between the contrast medium and the energy spectrum of an X-radiation used for a scan. A method for the use of a lanthanide-containing complex to produce a contrast medium for optimizing the combination between the contrast medium and the radiation to obtain a maximum contrast-to-noise ratio in an X-ray image is also provided.
摘要翻译： 公开了一种X射线系统，其包括用于找到造影剂与用于扫描的x辐射的能谱之间的最佳组合的选择器，以优化噪声对比度。 还提供了一种用于创建X射线图像的方法。 通过考虑造影介质和用于扫描的X射线的能谱之间的最佳组合，借助造影剂创建X射线图像。 还提供了一种使用含镧系元素的络合物以产生用于优化造影剂和辐射之间的组合以在X射线图像中获得最大对比噪声比的造影剂的方法。
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公开(公告)号：US20070030944A1
公开(公告)日：2007-02-08
申请号：US11499662
申请日：2006-08-07
CPC分类号： G01N23/046 , A61B6/032 , A61B6/405 , A61B6/482 , G01N2223/419
摘要： A method is for determining a parameter in an image area as a measure of a homogeneity of a substance in an object, and to a method for segmenting a substance in an image that uses the parameter as an additional segmentation criterion. In the method, at least two X-ray images are acquired in relation to different energies E1, E2 of an X-radiation, and the parameter is determined from the statistical distribution of attenuation values Di(E1),Di(E2) where i=1, . . . , N in the image area such that faulty classifications can be avoided in a simple way during the segmentation.
摘要翻译： 一种用于确定图像区域中的参数作为物体中物质的均匀性的量度的方法，以及用于将使用该参数的图像中的物质分割为附加分割标准的方法。 在该方法中，相对于X射线的不同能量E 1，E 2获取至少两个X射线图像，并且根据衰减值Di（E 1），Di（E）的统计分布来确定参数 2）其中i = 1，。 。 。 ，N，使得在分割期间可以以简单的方式避免错误的分类。
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