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1.发明授权Method and tomography unit for the reconstruction of a tomographic display of an object 失效用于重建物体的断层显像的方法和断层摄影单元公开(公告)号：US07447295B2
公开(公告)日：2008-11-04
申请号：US11584544
申请日：2006-10-23
IPC分类号： H05G1/60
CPC分类号： G01N23/046 , A61B6/032 , A61B6/583 , G01N2223/419 , G01N2223/612 , G06T11/005 , G06T2211/421 , G06T2211/424
摘要： A method is disclosed for reconstructing a tomographic representation of an object from projection data off a moving radiation source through this object onto a detector, filtering and back projection of the projection data being executed in the reconstruction. In an embodiment of the method, by using at least one identical spatial arrangement of the radiation source, the detector and a test object instead of the object to be scanned, there is determined by test projections and an iterative reconstruction technique, a filter that in the given arrangement results in an optimum filtering and back projection of the projection data of the test object for the tomographic representation. Further, the object is scanned instead of the test object in the given arrangement and projection data are determined. Finally, the reconstruction of the tomographic representation is carried out using these projection data and the filter determined. Moreover, an embodiment of a tomography unit for carrying out this method is also disclosed.
摘要翻译： 公开了一种用于将通过该物体的运动辐射源的投影数据从物体重建成检测器的方法，对重建中正在执行的投影数据进行滤波和反投影。 在该方法的一个实施例中，通过使用辐射源，检测器和测试对象的至少一个相同的空间排列而不是要扫描的对象，通过测试投影和迭代重建技术来确定滤波器， 给定的布置导致用于断层图像的测试对象的投影数据的最佳滤波和反投影。 此外，在给定的布置中扫描对象而不是测试对象，并且确定投影数据。 最后，使用这些投影数据并确定滤波器来进行断层图像的重建。 此外，还公开了用于执行该方法的断层摄影单元的实施例。
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2.发明申请Method and tomography unit for the reconstruction of a tomographic representation of an object 失效用于重建对象的断层图像的方法和断层摄影单元公开(公告)号：US20070093711A1
公开(公告)日：2007-04-26
申请号：US11584544
申请日：2006-10-23
IPC分类号： A61B5/05
CPC分类号： G01N23/046 , A61B6/032 , A61B6/583 , G01N2223/419 , G01N2223/612 , G06T11/005 , G06T2211/421 , G06T2211/424
摘要： A method is disclosed for reconstructing a tomographic representation of an object from projection data off a moving radiation source through this object onto a detector, filtering and back projection of the projection data being executed in the reconstruction. In an embodiment of the method, by using at least one identical spatial arrangement of the radiation source, the detector and a test object instead of the object to be scanned, there is determined by test projections and an iterative reconstruction technique, a filter that in the given arrangement results in an optimum filtering and back projection of the projection data of the test object for the tomographic representation. Further, the object is scanned instead of the test object in the given arrangement and projection data are determined. Finally, the reconstruction of the tomographic representation is carried out using these projection data and the filter determined. Moreover, an embodiment of a tomography unit for carrying out this method is also disclosed.
摘要翻译： 公开了一种用于将通过该物体的运动辐射源的投影数据从物体重建成检测器的方法，对重建中正在执行的投影数据进行滤波和反投影。 在该方法的一个实施例中，通过使用辐射源，检测器和测试对象的至少一个相同的空间排列而不是要扫描的对象，通过测试投影和迭代重建技术来确定滤波器， 给定的布置导致用于断层图像的测试对象的投影数据的最佳滤波和反投影。 此外，在给定的布置中扫描对象而不是测试对象，并且确定投影数据。 最后，使用这些投影数据并确定滤波器来进行断层图像的重建。 此外，还公开了用于执行该方法的断层摄影单元的实施例。
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3.发明申请Increased Temporal Resolution In The Case Of CT Images By Means Of Iterative View Reconstruction With Limiting Conditions 有权在CT图像的情况下，通过具有限制条件的迭代视图重建来增加时间分辨率公开(公告)号：US20110268335A1
公开(公告)日：2011-11-03
申请号：US13098530
申请日：2011-05-02
CPC分类号： A61B6/032 , A61B6/027 , A61B6/4441 , A61B6/482 , A61B6/507 , A61B6/5205 , A61B6/5258 , A61B6/5264 , A61B6/5288 , A61B6/541 , G06T11/006 , G06T2211/424 , G06T2211/436
摘要： A method is disclosed for the reconstruction of image data of a moving object to be examined from measurement data, wherein the measurement data has previously been established in a relative rotational movement between a radiation source of a computed tomography system and the object to be examined. In at least one embodiment, first image data is reconstructed from an incomplete measurement data record by way of an iterative algorithm, wherein in the iterative reconstruction a dimension is used which contains probability information relating to pixel values of the image data to be reconstructed.
摘要翻译： 公开了一种用于从测量数据重建要检查的移动物体的图像数据的方法，其中测量数据先前已经在计算机断层摄影系统的辐射源和待检查对象之间的相对旋转运动中建立。 在至少一个实施例中，通过迭代算法从不完整的测量数据记录重建第一图像数据，其中在迭代重建中使用包含与要重构的图像数据的像素值有关的概率信息的维度。
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4.发明授权Method for image reconstruction of an object with the aid of projections, and apparatus for carrying out the method 有权借助于投影来对象的图像重构的方法，以及用于执行该方法的装置公开(公告)号：US07653171B2
公开(公告)日：2010-01-26
申请号：US11806166
申请日：2007-05-30
申请人： Holger Kunze , Karl Stierstorfer
发明人： Holger Kunze , Karl Stierstorfer
IPC分类号： A61B6/03
CPC分类号： G06T11/006 , A61B6/466
摘要： A method is disclosed for image reconstruction of an object with the aid of at least one-dimensional projections of the object into a three-dimensional volume image data record, it being possible to generate the projections by at least one detector/source system with reference to different positions and angles relative to the object, and at least two projections forming a reconstruction volume in an overlap region as basis for a backprojection of the projections into the three-dimensional volume image data record, in particular computed tomography. An apparatus for carrying out the method is further disclosed. In at least one embodiment, supplemented reconstruction volumes are generated by supplementing reconstruction volumes, covered only partially by projections, by way of virtual projections that are derived from volume image data records. By comparison with reconstruction volumes that are merely interpolated, supplementing a reconstruction volume with the aid of virtual projections can decisively improve the image quality of the computed tomography images that are backprojected therefrom.
摘要翻译： 公开了一种借助于物体的至少一维投影到三维体积图像数据记录中的对象的图像重建的方法，可以由具有参考的至少一个检测器/源系统产生投影 至少两个突起，形成重叠区域中的重建体积，作为将投影反投影到三维体积图像数据记录，特别是计算机断层摄影中的基础。 进一步公开了一种用于执行该方法的装置。 在至少一个实施例中，通过补充由体积图像数据记录导出的虚拟投影来补充仅部分由投影部分覆盖的重建体积来生成补充的重建体积。 通过与仅内插的重建体积进行比较，借助于虚拟投影来补充重建体积可以有效地改善从其反向投影的计算机断层摄影图像的图像质量。
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5.发明申请Method and apparatus for the artifact-reduced detection of a 3D object in tomographic imaging 有权用于在断层成像中3D物体的伪像检测的方法和装置公开(公告)号：US20080205737A1
公开(公告)日：2008-08-28
申请号：US12068678
申请日：2008-02-11
申请人： Holger Kunze , Karl Stierstorfer
发明人： Holger Kunze , Karl Stierstorfer
CPC分类号： G06T11/006 , G06T2211/424 , G06T2211/432
摘要： Incomplete data records owing to an object extent that stretches beyond the scanning field of view (SFOV) constitute a general problem in computed tomography. In these cases, parts of the object are to be reconstructed, for which only incomplete projections from an angular range of less than 180° are available. The application of iterative algorithms such as, for example, the algebraic reconstruction technique (ART) or the simultaneous algebraic reconstruction technique (SART) to this problem of truncated projections cannot lead to a satisfactory solution unless use is made of special boundary conditions. In order to regularize the reconstruction method, in at least one embodiment, information relating to the statistics of the attenuation values of the reconstructed object is also included in the form of the logarithmic probability function of the attenuation values. This information can be obtained from the regions of those image parts which are still completely contained in the SFOV, but nevertheless lie in the vicinity of the region where the object leaves the SFOV. Furthermore, the information can be used in an algebraic reconstruction method by adding a boundary condition term to the cost function to be minimized. Experiments indicate that taking account of this information leads to good estimates with reference to the object in the event of insubstantially truncated projections such as are customary in CT applications, for example.
摘要翻译： 由于目标范围延伸超出扫描视场（SFOV）的不完整的数据记录在计算机断层摄影中构成了一个普遍的问题。 在这些情况下，要重构对象的部分，仅从角度范围小于180°的不完全投影可用。 对于这种截断投影的问题，迭代算法（例如代数重建技术（ART）或同时代数重构技术（SART））的应用不能导致令人满意的解决方案，除非使用特殊的边界条件。 为了使重建方法正规化，在至少一个实施例中，与重建对象的衰减值的统计相关的信息也以衰减值的对数概率函数的形式包含。 该信息可以从仍然完全包含在SFOV中的那些图像部分的区域获得，但仍然位于物体离开SFOV的区域附近。 此外，通过向成本函数添加边界条件项以最小化，可以在代数重建方法中使用该信息。 实验表明，考虑到这种信息，在例如CT应用中常见的非实质截断的投影的情况下，参考对象可以得出良好的估计。
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6.发明授权Increased temporal resolution in the case of CT images by means of iterative view reconstruction with limiting conditions 有权在CT图像的情况下通过具有限制条件的迭代视图重建来增加时间分辨率公开(公告)号：US08630472B2
公开(公告)日：2014-01-14
申请号：US13098530
申请日：2011-05-02
IPC分类号： G06K9/00
CPC分类号： A61B6/032 , A61B6/027 , A61B6/4441 , A61B6/482 , A61B6/507 , A61B6/5205 , A61B6/5258 , A61B6/5264 , A61B6/5288 , A61B6/541 , G06T11/006 , G06T2211/424 , G06T2211/436
摘要： A method is disclosed for the reconstruction of image data of a moving object to be examined from measurement data, wherein the measurement data has previously been established in a relative rotational movement between a radiation source of a computed tomography system and the object to be examined. In at least one embodiment, first image data is reconstructed from an incomplete measurement data record by way of an iterative algorithm, wherein in the iterative reconstruction a dimension is used which contains probability information relating to pixel values of the image data to be reconstructed.
摘要翻译： 公开了一种用于从测量数据重建要检查的移动物体的图像数据的方法，其中测量数据先前已经在计算机断层摄影系统的辐射源和待检查对象之间的相对旋转运动中建立。 在至少一个实施例中，通过迭代算法从不完整的测量数据记录重建第一图像数据，其中在迭代重建中使用包含与要重构的图像数据的像素值有关的概率信息的维度。
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7.发明授权Method and apparatus for the artifact-reduced detection of a 3D object in tomographic imaging 有权用于在断层成像中3D物体的伪像检测的方法和装置公开(公告)号：US08175361B2
公开(公告)日：2012-05-08
申请号：US12068678
申请日：2008-02-11
申请人： Holger Kunze , Karl Stierstorfer
发明人： Holger Kunze , Karl Stierstorfer
IPC分类号： G06K9/00
CPC分类号： G06T11/006 , G06T2211/424 , G06T2211/432
摘要： In order to regularize a reconstruction method associated with computed tomography (CT), in at least one example embodiment, information relating to the statistics of the attenuation values of the reconstructed object is also included in the form of the logarithmic probability function of the attenuation values. This information can be obtained from the regions of those image parts which are still completely contained in a scanning field of view (SFOV), but nevertheless lie in the vicinity of the region where the object leaves the SFOV. Furthermore, the information may be used in an algebraic reconstruction method by adding a boundary condition term to the cost function to be minimized.
摘要翻译： 为了规范与计算机断层摄影（CT）相关联的重建方法，在至少一个示例实施例中，与重建对象的衰减值的统计信息有关的信息也被包括在衰减值的对数概率函数的形式中 。 该信息可以从仍然完全包含在扫描视野（SFOV）中的那些图像部分的区域获得，但仍然位于物体离开SFOV的区域附近。 此外，该信息可以在代数重建方法中使用，将边界条件项添加到要最小化的成本函数中。
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8.发明申请Method for image reconstruction of an object with the aid of projections, and apparatus for carrying out the method 有权借助于投影来对象的图像重构的方法，以及用于执行该方法的装置公开(公告)号：US20070280407A1
公开(公告)日：2007-12-06
申请号：US11806166
申请日：2007-05-30
申请人： Holger Kunze , Karl Stierstorfer
发明人： Holger Kunze , Karl Stierstorfer
CPC分类号： G06T11/006 , A61B6/466
摘要： A method is disclosed for image reconstruction of an object with the aid of at least one-dimensional projections of the object into a three-dimensional volume image data record, it being possible to generate the projections by at least one detector/source system with reference to different positions and angles relative to the object, and at least two projections forming a reconstruction volume in an overlap region as basis for a backprojection of the projections into the three-dimensional volume image data record, in particular computed tomography. An apparatus for carrying out the method is further disclosed. In at least one embodiment, supplemented reconstruction volumes are generated by supplementing reconstruction volumes, covered only partially by projections, by way of virtual projections that are derived from volume image data records. By comparison with reconstruction volumes that are merely interpolated, supplementing a reconstruction volume with the aid of virtual projections can decisively improve the image quality of the computed tomography images that are backprojected therefrom.
摘要翻译： 公开了一种借助于物体的至少一维投影到三维体积图像数据记录中的对象的图像重建的方法，可以由具有参考的至少一个检测器/源系统产生投影 至少两个突起，形成重叠区域中的重建体积，作为将投影反投影到三维体积图像数据记录，特别是计算机断层摄影中的基础。 进一步公开了一种用于执行该方法的装置。 在至少一个实施例中，通过补充由体积图像数据记录导出的虚拟投影来补充仅部分由投影部分覆盖的重建体积来生成补充的重建体积。 通过与仅内插的重建体积进行比较，借助于虚拟投影来补充重建体积可以有效地改善从其反向投影的计算机断层摄影图像的图像质量。
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公开(公告)号：US08768030B2
公开(公告)日：2014-07-01
申请号：US13020256
申请日：2011-02-03
申请人： Herbert Bruder , Karl Stierstorfer
发明人： Herbert Bruder , Karl Stierstorfer
CPC分类号： A61B6/481 , A61B6/032 , A61B6/4014 , A61B6/466 , A61B6/482 , A61B6/504 , A61B6/507 , G06T11/006 , G06T2211/424
摘要： A method is disclosed for reconstructing image data of an examination object from measurement data of a computed tomography system, the examination object having been irradiated simultaneously by a number of X-ray sources while the measurement data was being acquired so that different projections of the examination object associated with the number of X-ray sources were acquired simultaneously for each detector element. In at least one embodiment, different iteration images of the examination object are determined one after the other from the measurement data by way of an iterative algorithm, a computation operation being employed with the iterative algorithm, which is applied to the iteration images and takes the presence of the number of X-ray sources into account.
摘要翻译： 公开了一种用于从计算机断层摄影系统的测量数据重建检查对象的图像数据的方法，在获取测量数据的同时由多个X射线源同时照射检查对象，使得检查的不同预测 与每个检测器元件同时获取与X射线源数量相关联的物体。 在至少一个实施例中，通过迭代算法从测量数据一个接一个地确定检查对象的不同迭代图像，与迭代算法一起使用计算操作，其应用于迭代图像，并采用 存在X射线源的数量。
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公开(公告)号：US08422627B2
公开(公告)日：2013-04-16
申请号：US12585579
申请日：2009-09-18
IPC分类号： A61B6/03
摘要： A method is disclosed for detecting X-ray radiation from an X-ray emitter. In at least one embodiment of the method, an electric pulse with a pulse amplitude characteristic of the energy of a quantum is generated when a quantum of the X-ray radiation impinges on a sensor, wherein a number of threshold energies are predetermined. When the pulse amplitude corresponding to the respective energy is exceeded, a signal is emitted each time the pulse amplitude corresponding to a respective threshold energy is exceeded. At least one embodiment of the method permits reliable and high-quality imaging, even in image regions with high X-ray quanta rates. To this end, at least one of the threshold energies is predetermined such that it is higher than the maximum energy of the X-ray spectrum emitted by the X-ray emitter.
摘要翻译： 公开了一种用于检测来自X射线发射器的X射线辐射的方法。 在该方法的至少一个实施例中，当X射线辐射的量子撞击到传感器上时，产生具有量子能量的脉冲振幅特性的电脉冲，其中预定了许多阈值能量。 当超过对应于各自能量的脉冲幅度时，每当超过对应于相应的阈值能量的脉冲幅度时，发出信号。 该方法的至少一个实施例允许可靠和高质量的成像，即使在具有高X射线量子速率的图像区域中。 为此，阈值能量中的至少一个是预定的，使得它高于由X射线发射器发射的X射线光谱的最大能量。
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