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    Multi-spectral CT imaging
    1.
    发明授权
    Multi-spectral CT imaging 有权

    公开(公告)号：US10290122B2

    公开(公告)日：2019-05-14

    申请号：US15092784

    申请日：2016-04-07

    申请人： Thomas Allmendinger ,  Rainer Raupach ,  Bernhard Schmidt ,  Harald Schöndube

    发明人： Thomas Allmendinger ,  Rainer Raupach ,  Bernhard Schmidt ,  Harald Schöndube

    IPC分类号： G06T1/00 ,  G06T11/00

    摘要： A multi-spectral CT imaging method, preferably a CT imaging method, is described. Spectrally resolved projection scan data is acquired from a region to be imaged of an examination object. The data is assigned to a plurality of pre-determined different partial spectra. Spectrally resolved image data is reconstructed with a plurality of attenuation values for each image point of the region to be imaged. The attenuation values are each assigned to one of the pre-determined different partial spectra. Furthermore, an extremal attenuation value is determined for each image point on the basis of the plurality of attenuation values. A representative image data set is determined such that the determined extremal attenuation value is assigned to each image point.

    MULTISPECTRAL CT IMAGING
    2.
    发明申请
    MULTISPECTRAL CT IMAGING 审中-公开
    多重CT成像

    公开(公告)号：US20160307340A1

    公开(公告)日：2016-10-20

    申请号：US15092784

    申请日：2016-04-07

    申请人： Thomas Allmendinger ,  Rainer Raupach ,  Bernhard Schmidt ,  Harald Schöndube

    发明人： Thomas Allmendinger ,  Rainer Raupach ,  Bernhard Schmidt ,  Harald Schöndube

    IPC分类号： G06T11/00

    CPC分类号： G06T11/008 ,  G06T2211/408

    摘要： A multi-spectral CT imaging method, preferably a CT imaging method, is described. Spectrally resolved projection scan data is acquired from a region to be imaged of an examination object. The data is assigned to a plurality of pre-determined different partial spectra. Spectrally resolved image data is reconstructed with a plurality of attenuation values for each image point of the region to be imaged. The attenuation values are each assigned to one of the pre-determined different partial spectra. Furthermore, an extremal attenuation value is determined for each image point on the basis of the plurality of attenuation values. A representative image data set is determined such that the determined extremal attenuation value is assigned to each image point.

    摘要翻译： 描述了多光谱CT成像方法，优选CT成像方法。 从检查对象的要成像的区域获取光谱分辨的投影扫描数据。 将数据分配给多个预定的不同部分光谱。 用要成像的区域的每个图像点的多个衰减值来重构光谱分辨的图像数据。 衰减值分别被分配给预定的不同部分光谱之一。 此外，基于多个衰减值，针对每个图像点确定极值衰减值。 确定代表性图像数据集，使得确定的极值衰减值被分配给每个图像点。

    STRUCTURE-COMPLIANT NOISE REDUCTION DURING MULTISPECTRAL COMPUTED TOMOGRAPHY IMAGING
    4.
    发明申请
    STRUCTURE-COMPLIANT NOISE REDUCTION DURING MULTISPECTRAL COMPUTED TOMOGRAPHY IMAGING 审中-公开
    多重计算机图像成像期间结构合理的噪声减少

    公开(公告)号：US20160300368A1

    公开(公告)日：2016-10-13

    申请号：US15091658

    申请日：2016-04-06

    申请人： Thomas Flohr ,  Steffen Kappler ,  Rainer Raupach ,  Harald Schöndube

    发明人： Thomas Flohr ,  Steffen Kappler ,  Rainer Raupach ,  Harald Schöndube

    IPC分类号： G06T11/00 ,  G06T5/00 ,  G06F19/00

    CPC分类号： G06T11/005 ,  G06F19/00 ,  G06F19/321 ,  G06T11/006 ,  G06T2211/421 ,  G06T2211/424

    摘要： A method for reconstructing image data during CT imaging is described. In the method, a plurality of independent data records of projection measured data are captured. A combined data record is then determined based on the captured data records. In addition, morphological information is determined based on the combined data record. A target data record is also determined based on the captured independent data records. A target image data record is reconstructed based on the target data record and the determined morphological information. An image data determination facility and a computed tomography system are also described.

    摘要翻译： 描述了在CT成像期间重建图像数据的方法。 在该方法中，捕获投影测量数据的多个独立数据记录。 然后，基于捕获的数据记录来确定组合的数据记录。 另外，基于组合的数据记录来确定形态信息。 目标数据记录也是基于所捕获的独立数据记录来确定的。 基于目标数据记录和确定的形态信息来重构目标图像数据记录。 还描述了图像数据确定装置和计算机断层摄影系统。

    Precise image reconstruction of spiral CT images at optional pitch values
    6.
    发明申请
    Precise image reconstruction of spiral CT images at optional pitch values 有权
    螺旋CT图像的精确图像重建在可选的音调值

    公开(公告)号：US20110052021A1

    公开(公告)日：2011-03-03

    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： G06K9/00

    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。

    Method and image reconstruction device for generating computed tomography image data
    7.
    发明申请
    Method and image reconstruction device for generating computed tomography image data 有权
    用于生成计算机断层摄影图像数据的方法和图像重建装置

    公开(公告)号：US20100046819A1

    公开(公告)日：2010-02-25

    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 ,  H05G1/60

    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 groups of M-lines for the reconstructions being selected from different of the following M-line subsets: i) a first M-line subset which is selected such that a surface constituted by the respective M-lines meets the detector surface completely within a Tam-Danielsson window, ii) a second M-line subset which is selected such that a surface constituted by the respective M-lines intersects a detector area before the Tam-Danielsson window in the infeed direction, iii) a third M-line subset which is selected such that a surface constituted by the respective M-lines intersects a detector area after the Tam-Danielsson window in the infeed direction. Lastly, the different reconstructed volumes are combined 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，感兴趣体积的至少两个基于体积的重建通过在由不同M组线组构成的表面上的差分背投进行执行，然后在每种情况下通过反希尔伯特变换，组 用于重建的M线从不同的以下M线子集中选择：i）第一M线子集，其被选择为使得由相应M线构成的表面完全在Tam- 丹尼尔森窗口，ii）第二M线子集，其被选择为使得由相应M线构成的表面在进给方向上与Tam-Danielsson窗口之间的检测器区域相交; iii）第三M线子集，其是 被选择为使得由相应的M行构成的表面在进给方向上的Tam-Danielsson窗口之后与检测器区域相交。 最后，组合不同的重建体积以形成感兴趣体积的最终重建。

    CT image reconstruction in the extended field of view
    8.
    发明授权
    CT image reconstruction in the extended field of view 有权
    CT图像重建在扩展视野中

    公开(公告)号：US09495769B2

    公开(公告)日：2016-11-15

    申请号：US13869081

    申请日：2013-04-24

    申请人： Herbert Bruder ,  Harald Schöndube

    发明人： Herbert Bruder ,  Harald Schöndube

    IPC分类号： G06T11/00 ,  A61B6/00

    CPC分类号： G06T11/003 ,  A61B6/507 ,  G06T11/005 ,  G06T11/006 ,  G06T2211/432

    摘要： A method is disclosed for the reconstruction of image data of an object under examination from measured data, wherein the measured data has been acquired during a relative rotational movement between a radiation source of a computed tomography system and the object under examination. A delimited area between the radiation source and a detector represents a field of view, in respect of which measured data can be acquired. During the measured data acquisition, parts of the object under examination were located at least partly outside of the field of view. A reconstruction is carried out of first image data from the measured data. The first image data is modified via a threshold value comparison, and the modified data is processed with a morphological filter, and projection data is calculated. The measured data is modified using the projection data, and, second image data is reconstructed.

    摘要翻译： 公开了一种用于从测量数据重建被检查对象的图像数据的方法，其中在计算机断层摄影系统的辐射源和被检查对象之间的相对旋转运动期间已经获取了测量数据。 辐射源和检测器之间的界定区域表示可以获取测量数据的视场。 在测量数据采集期间，被检查对象的部分至少部分位于视野外。 从测量数据中对第一图像数据进行重建。 通过阈值比较修改第一图像数据，并用形态滤波器处理修改的数据，并计算投影数据。 使用投影数据修改测量数据，并重建第二图像数据。