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    Circuit arrangement for counting X-ray radiation X-ray quanta by way of quanta-counting detectors, and also an application-specific integrated circuit and an emitter-detector system
    71.
    发明授权
    Circuit arrangement for counting X-ray radiation X-ray quanta by way of quanta-counting detectors, and also an application-specific integrated circuit and an emitter-detector system 有权
    用于通过量子计数检测器计数X射线辐射X射线量子的电路装置，以及专用集成电路和发射极检测器系统

    公开(公告)号：US08450695B2

    公开(公告)日：2013-05-28

    申请号：US12953539

    申请日：2010-11-24

    申请人： Steffen Kappler ,  Karl Stierstorfer

    发明人： Steffen Kappler ,  Karl Stierstorfer

    IPC分类号： G01T1/24

    CPC分类号： G01T1/17

    摘要： In at least one embodiment, a circuit arrangement of a quanta-counting detector with a multiplicity of detector elements is disclosed, wherein the X-ray quanta registered in each detector element generate a signal profile. In at least one embodiment, the circuit arrangement, in each detector element, includes: at least one first comparator with a first energy threshold lying in the energy range of the measured X-ray quanta and at least one second comparator with a second energy threshold lying above the energy range of the measured X-ray quanta, the at least one first and second comparators being connected to the detector element. Further, the at least two comparators have a logical interconnection, wherein at least a first comparator and a second comparator are connected to the inputs of an XOR gate, and each XOR gate connected to a first comparator is connected to precisely one edge-sensitive counter.

    摘要翻译： 在至少一个实施例中，公开了具有多个检测器元件的量子计数检测器的电路装置，其中登记在每个检测器元件中的X射线量子产生信号轮廓。 在至少一个实施例中，每个检测器元件中的电路装置包括：具有第一能量阈值的至少一个第一比较器，其位于测量的X射线量子的能量范围内，并且至少一个第二比较器具有第二能量阈值 位于测量的X射线量子的能量范围之上，所述至少一个第一和第二比较器连接到检测器元件。 此外，至少两个比较器具有逻辑互连，其中至少第一比较器和第二比较器连接到异或门的输入，并且连接到第一比较器的每个异或门精确连接到一个边缘敏感计数器 。

    Method and apparatus for the artifact-reduced detection of a 3D object in tomographic imaging
    72.
    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。

    CT MEASUREMENT WITH MULTIPLE X-RAY SOURCES
    75.
    发明申请
    CT MEASUREMENT WITH MULTIPLE X-RAY SOURCES 有权
    CT测量与多个X射线源

    公开(公告)号：US20110188724A1

    公开(公告)日：2011-08-04

    申请号：US13020256

    申请日：2011-02-03

    申请人： Herbert Bruder ,  Karl Stierstorfer

    发明人： Herbert Bruder ,  Karl Stierstorfer

    IPC分类号： G06K9/00 ,  A61B6/03

    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。

    Imaging method for variable pitch spiral CT and a CT machine for carrying out the method
    76.
    发明授权
    Imaging method for variable pitch spiral CT and a CT machine for carrying out the method 有权
    可变螺距CT成像方法及CT机执行方法

    公开(公告)号：US07978810B2

    公开(公告)日：2011-07-12

    申请号：US12149487

    申请日：2008-05-02

    申请人： Karl Schwarz ,  Karl Stierstorfer

    发明人： Karl Schwarz ,  Karl Stierstorfer

    IPC分类号： A61B6/00

    CPC分类号： G06T11/006 ,  A61B6/027

    摘要： An imaging method is disclosed for variable pitch spiral CT. In at least one embodiment, the method includes spiral scanning of an examination object lying on a patient table, with the aid of a beam emanating from at least one focus, and the aid of a detector arrangement of planar design lying opposite the focus, the detector arrangement supplying output data that represent the attenuation of the beams during passage through the examination object; filtering the output data; weighted back projection of the filtered output data; and visualizing a layer or a volume on a display unit on the basis of the back projected output data. In at least one embodiment, a non constant pitch of the spiral scanning is taken into account computationally during the back projection. In at least one embodiment, a CT machine is disclosed for carrying out the above named method.

    摘要翻译： 公开了一种用于变桨距螺旋CT的成像方法。 在至少一个实施例中，该方法包括借助于从至少一个焦点发出的光束以及与焦点相对的平面设计的检测器布置的帮助，躺在患者台上的检查对象的螺旋扫描， 提供输出数据的检测器装置，其表示在通过检查对象期间光束的衰减; 过滤输出数据; 滤波输出数据的加权反投影; 并且基于背投影输出数据可视化显示单元上的图层或音量。 在至少一个实施例中，螺旋扫描的非恒定间距在后投影期间被计算考虑在内。 在至少一个实施例中，公开了一种用于执行上述方法的CT机器。

    Method and device for segmenting at least one substance in an x-ray image
    77.
    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

    申请人： Michael Grasruck ,  Karl Stierstorfer

    发明人： Michael Grasruck ,  Karl Stierstorfer

    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。

    Method for an X-ray machine
    78.
    发明授权
    Method for an X-ray machine 有权
    X光机的方法

    公开(公告)号：US07840043B2

    公开(公告)日：2010-11-23

    申请号：US11499662

    申请日：2006-08-07

    申请人： Michael Grasruck ,  Karl Stierstorfer

    发明人： Michael Grasruck ,  Karl Stierstorfer

    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。

    Method for compiling computer tomographic representations using a CT system with at least two angularly offset ray sources
    80.
    发明授权
    Method for compiling computer tomographic representations using a CT system with at least two angularly offset ray sources 有权
    使用具有至少两个角偏移射线源的CT系统来编译计算机断层图像表示的方法

    公开(公告)号：US07711081B2

    公开(公告)日：2010-05-04

    申请号：US11491959

    申请日：2006-07-25

    申请人： Herbert Bruder ,  Thomas Flohr ,  Karl Schwarz ,  Karl Stierstorfer

    发明人： Herbert Bruder ,  Thomas Flohr ,  Karl Schwarz ,  Karl Stierstorfer

    IPC分类号： A61B6/03

    CPC分类号： A61B6/4014 ,  A61B6/027 ,  A61B6/032 ,  A61B6/4085 ,  G01N2223/419

    摘要： A method is disclosed for compiling computer tomographic representations using a CT system with at least two angularly offset ray sources. A first ray cone with a relatively larger fan angle and a second ray cone with a relatively smaller fan angle scan an object circularly or spirally. The first ray cone generates a first dataset A and the second ray cone generates a dataset B. The dataset B of the smaller ray cone is supplemented with other data at the edge to give an expanded dataset B+ for reconstruction of the CT representation. The expanded dataset B+ of the second, smaller ray cone and the dataset A of the first, larger ray cone is subjected to a convolution operation to give datasets B+′ and A′. Finally, a back projection to reconstruct sectional images or volume data is respectively carried out from the convoluted datasets B+′ and A′. The dataset B is supplemented with data of the dataset A and supplementary data are removed from the dataset B+′ after the convolution but before the back projection.

    摘要翻译： 公开了一种使用具有至少两个角偏移射线源的CT系统来编译计算机断层图像表示的方法。 具有相对较大扇角的第一射线锥体和具有较小扇形角度的第二射线锥体圆形地或螺旋地扫描物体。 第一射线锥产生第一数据集A，第二射线锥生成数据集B.较小射线锥的数据集B在边缘被补充其他数据，以给出用于重建CT表示的扩展数据集B +。 将第二较小的光线锥体的扩展数据集B +和第一个较大的光线锥体的数据集A进行卷积运算，以给出数据集B +'和A'。 最后，从卷积数据集B +'和A'分别进行重建截面图像或体积数据的背投影。 数据集B补充数据集A的数据，并且在卷积之后但在反投影之前从数据集B +'中删除补充数据。