公开(公告)号：US08306304B2

公开(公告)日：2012-11-06

申请号：US12462000

申请日：2009-08-31

申请人： Frédéric Noo ,  Harald Schöndube ,  Karl Stierstorfer

发明人： Frédéric Noo ,  Harald Schöndube ,  Karl Stierstorfer

IPC分类号： A61B6/03

CPC分类号： A61B6/032 ,  A61B6/027 ,  A61B6/4441 ,  A61B6/507 ,  A61B6/5205 ,  G06T11/006 ,  G06T2211/416 ,  G06T2211/421

摘要： At least one embodiment of the invention relates to a method for the reconstruction of image data of an examined object from measuring data, wherein the measuring data were detected by a detector within and outside of its Tam-Danielsson window during a relative spiral movement between a radiation source of a computer tomography system and the examined object. As a result of the spiral movement, the measuring data outside of the Tam-Danielsson contain interruptions. A mathematically precise first reconstruction of first image data is realized in at least one embodiment based on the measuring data by using only measuring data from the Tam-Danielsson window. A mathematically precise second reconstruction is furthermore realized of second image data from the measuring data in at least one embodiment, using at least among other things measuring data from outside of the Tam-Danielsson window, wherein the interruption of the measuring data is compensated for by using existing measuring data and/or the first image data and/or other image data obtained from existing measuring data. Finally, the first image data and the second image data are combined.

摘要翻译： 本发明的至少一个实施例涉及一种用于从测量数据重建被检查对象的图像数据的方法，其中在其Tam-Danielsson窗口内外的检测器检测测量数据， 计算机断层摄影系统的辐射源和检查对象。 由于螺旋运动，Tam-Danielsson以外的测量数据包含中断。 在至少一个实施例中，通过仅使用来自Tam-Danielsson窗口的测量数据，基于测量数据来实现第一图像数据的数学上精确的第一重建。 在至少一个实施例中，使用至少测量来自Tam-Danielsson窗口外部的数据的测量数据的中断，至少在其中测量来自测量数据的第二图像数据的数学上精确的第二重构，其中测量数据的中断由 使用现有测量数据和/或从现有测量数据获得的第一图像数据和/或其他图像数据。 最后，组合第一图像数据和第二图像数据。

公开(公告)号：US20120195483A1

公开(公告)日：2012-08-02

申请号：US13358624

申请日：2012-01-26

申请人： Harald Schöndube ,  Karl Stierstorfer

发明人： Harald Schöndube ,  Karl Stierstorfer

IPC分类号： G06K9/00

CPC分类号： A61B6/032 ,  A61B6/027 ,  A61B6/5258 ,  G06T5/005 ,  G06T2207/10081 ,  G06T2207/20032

摘要： A method and computer system are disclosed with software for artifact reduction in CT image datasets for spiral scans from a CT system with an inclined gantry. In at least one embodiment, for each of at least two positions of the center of rotation, which is moved during the spiral scan, the removal of annular artifacts is carried out around these positions, during which the position concerned is used as the center point of the annular artifacts to be removed.

摘要翻译： 公开了一种方法和计算机系统，其具有用于从具有倾斜机架的CT系统进行螺旋扫描的CT图像数据集中的伪像减少的软件。 在至少一个实施例中，对于在螺旋扫描期间移动的旋转中心的至少两个位置中的每一个，围绕这些位置执行环形伪像的去除，在该位置期间，将所述位置用作中心点 要除去的环形假象。

公开(公告)号：US20110268335A1

公开(公告)日：2011-11-03

申请号：US13098530

申请日：2011-05-02

申请人： Holger Kunze ,  Harald Schöndube ,  Karl Stierstorfer

发明人： Holger Kunze ,  Harald Schöndube ,  Karl Stierstorfer

IPC分类号： G06K9/00 ,  A61B6/03

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。

公开(公告)号：US08050480B2

公开(公告)日：2011-11-01

申请号：US12453911

申请日：2009-05-27

申请人： Frédéric Noo ,  Harald Schöndube ,  Karl Stierstorfer

发明人： Frédéric Noo ,  Harald Schöndube ,  Karl Stierstorfer

IPC分类号： G06K9/00 ,  A61B6/00

CPC分类号： G06T11/006 ,  A61B6/027 ,  G06T2211/416 ,  G06T2211/421

摘要： A method is disclosed for generating computed tomography image data of a volume of interest from X-ray CT data sets generated by a computed tomography system during scanning of an examination subject on a helical path rotating around a longitudinal system axis in the infeed direction. In at least one embodiment, at least two volume-based reconstructions of the volume of interest are performed by way of differential back-projection over surfaces constituted by different groups of M-lines, followed in each case by an inverse Hilbert transformation. The method further includes combining different reconstructed volumes to form a final reconstruction of the volume of interest.

摘要翻译： 公开了一种用于在扫描受试者的扫描期间由计算机断层摄影系统生成的X射线CT数据集的计算机断层摄影图像数据的生成的方法，所述X射线CT数据集沿着在进给方向上围绕纵向系统轴线旋转的螺旋路径。 在至少一个实施例中，通过在由不同M行组组成的表面上的差异背投影来执行感兴趣体积的至少两个基于体积的重建，然后在每种情况下通过反希尔伯特变换。 该方法还包括组合不同的重建体积以形成感兴趣体积的最终重建。