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1.发明申请Method for producing tomographic pictures with the aid of an X-ray computed tomography system with scattered radiation correction 失效借助于具有散射辐射校正的X射线计算机断层摄影系统产生断层图像的方法公开(公告)号：US20080198965A1
公开(公告)日：2008-08-21
申请号：US12071108
申请日：2008-02-15
申请人： Stefan Popescu , Herbert Bruder , Christoph Suess
发明人： Stefan Popescu , Herbert Bruder , Christoph Suess
IPC分类号： H05G1/60
CPC分类号： A61B6/032 , A61B6/405 , A61B6/482 , A61B6/488 , A61B6/5282
摘要： A method is disclosed for producing tomographic pictures with the aid of an X-ray CT system including at least two X-ray sources arranged on a gantry with an angular offset to scan an examination object. In at least one embodiment of the method, in order to determine the scattered radiation distribution, pre-scanning is carried out in which the X-ray sources rotate about the examination object and the dose rate is modulated as a function of the rotation angle, no radiation dose is output over the majority of the revolution, at specific pre-scan angles a dose rate is produced briefly and individually in each case by the X-ray sources of the focus/detector systems, and the received scattered radiation is measured simultaneously by the detectors of the at least one other focus/detector system. Moreover, at least one embodiment of the invention also relates to an X-ray CT system having at least two focus/detector systems and an arithmetic and control unit with a memory for program code that carries out during operation the method steps being stored.
摘要翻译： 公开了一种借助于X射线CT系统来生产断层图像的方法，所述X射线CT系统包括布置在具有角度偏移的台架上的至少两个X射线源以扫描检查对象。 在该方法的至少一个实施例中，为了确定散射辐射分布，进行预扫描，其中X射线源围绕检查对象旋转，并且剂量率作为旋转角度的函数被调制， 在大部分转速下不产生辐射剂量，在特定的预扫描角度下，通过焦点/检测器系统的X射线源短暂地和单独地产生剂量率，同时测量接收的散射辐射 通过至少一个其它焦点/检测器系统的检测器。 此外，本发明的至少一个实施例还涉及具有至少两个焦点/检测器系统的X射线CT系统和具有用于程序代码的存储器的算术和控制单元，所述存储器在操作期间在存储方法步骤期间执行。
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2.发明授权Method for producing tomographic pictures with the aid of an X-ray computed tomography system with scattered radiation correction 失效借助于具有散射辐射校正的X射线计算机断层摄影系统产生断层图像的方法公开(公告)号：US07636415B2
公开(公告)日：2009-12-22
申请号：US12071108
申请日：2008-02-15
申请人： Stefan Popescu , Herbert Bruder , Christoph Suess
发明人： Stefan Popescu , Herbert Bruder , Christoph Suess
IPC分类号： G01N23/00
CPC分类号： A61B6/032 , A61B6/405 , A61B6/482 , A61B6/488 , A61B6/5282
摘要： A method and an X-ray CT system are disclosed for producing tomographic pictures with the aid of an X-ray CT system including at least two X-ray sources arranged on a gantry with an angular offset to scan an examination object. In at least one embodiment of the method, in order to determine the scattered radiation distribution, pre-scanning is carried out in which the X-ray sources rotate about the examination object and the dose rate is modulated as a function of the rotation angle, no radiation dose is output over the majority of the revolution, at specific pre-scan angles a dose rate is produced briefly and individually in each case by the X-ray sources of the focus/detector systems, and the received scattered radiation is measured simultaneously by the detectors of the at least one other focus/detector system.
摘要翻译： 公开了一种借助X射线CT系统产生断层图像的方法和X射线CT系统，X射线CT系统包括布置在具有角度偏移的台架上的至少两个X射线源以扫描检查对象。 在该方法的至少一个实施例中，为了确定散射辐射分布，进行预扫描，其中X射线源围绕检查对象旋转，并且剂量率作为旋转角度的函数被调制， 在大部分转速下不产生辐射剂量，在特定的预扫描角度下，通过焦点/检测器系统的X射线源短暂地和单独地产生剂量率，同时测量接收的散射辐射 通过至少一个其它焦点/检测器系统的检测器。
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公开(公告)号：US09147267B2
公开(公告)日：2015-09-29
申请号：US13674422
申请日：2012-11-12
申请人： Herbert Bruder , Rainer Raupach
发明人： Herbert Bruder , Rainer Raupach
CPC分类号： G06T11/003 , A61B6/032 , A61B6/5205 , G06T11/006 , G06T2211/424
摘要： A method and image reconstruction facility are disclosed for reconstructing an image dataset based on a projection dataset acquired with the aid of an x-ray computed tomography apparatus. With an embodiment of the method, a first image dataset is reconstructed based on the projection dataset and an edge image dataset is generated, which indicates a measure of an edge strength of edges occurring in at least one spatial/temporal direction in the first image dataset, as a function of location. An output image dataset is then generated based on the first image dataset, with the resolution in the first image dataset being increased as a function of location in at least one spatial/temporal direction taking into account the edge image dataset.
摘要翻译： 公开了一种基于通过X射线计算机断层摄影装置获得的投影数据集来重构图像数据集的方法和图像重建装置。 利用该方法的实施例，基于投影数据集重建第一图像数据集，并且生成边缘图像数据集，其指示在第一图像数据集中的至少一个空间/时间方向上出现的边缘的边缘强度的度量 ，作为位置的函数。 然后，基于第一图像数据集生成输出图像数据集，其中第一图像数据集中的分辨率随着至少一个空间/时间方向的位置而增加，同时考虑边缘图像数据集。
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公开(公告)号：US08892187B2
公开(公告)日：2014-11-18
申请号：US11727751
申请日：2007-03-28
申请人： Herbert Bruder , Rainer Raupach
发明人： Herbert Bruder , Rainer Raupach
CPC分类号： G06T3/4007 , A61B6/032 , A61B6/503 , A61B6/5217 , G06T7/246 , G06T2207/30048 , G06T2211/412
摘要： A method is disclosed for reducing step artifacts in the forward increment direction of a cardio CT representation. In at least one embodiment, volume recordings or section images of first and second sub-volumes of a heart volume, which lie adjacent to one another in the forward increment direction and partially overlap in an overlap region, are recorded by a computer tomography system. Each sub-volume's detector data is used for the reconstruction coming from different heart cycles. Finally, a displacement vector relative to a second sub-volume is determined at least for a selected point of the overlap region of a first sub-volume and the second sub-volume is subjected at least partially to a spatial transformation according to the at least one displacement vector.
摘要翻译： 公开了一种用于减少心脏CT表示的向前增量方向上的步骤伪像的方法。 在至少一个实施例中，通过计算机断层摄影系统记录心脏体积的第一和第二子体积的体积记录或分段图像，其以正向增量方向彼此相邻并且在重叠区域中部分重叠。 每个子体积的检测器数据用于来自不同心脏周期的重建。 最后，至少对于第一子体积的重叠区域的选定点确定相对于第二子体积的位移矢量，并且至少部分地将第二子体积至少部分地进行空间变换，至少 一个位移矢量。
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公开(公告)号：US08718343B2
公开(公告)日：2014-05-06
申请号：US13111315
申请日：2011-05-19
IPC分类号： G06K9/00
CPC分类号： A61B6/5205 , A61B6/032 , A61B6/4014 , A61B6/4441 , A61B6/482 , A61B6/507 , A61B6/5258 , G06T11/006 , G06T2211/424
摘要： A method is disclosed for reconstructing image data of an examination object from measured data, wherein the measured data was captured previously during a relative rotary motion between a radiation source of a computed tomography system and the examination object. In at least one embodiment, the measured data is modified to achieve a particular grayscale characteristic of the image data to be reconstructed. The image data is calculated by way of an iterative algorithm using the modified measured data, wherein no arithmetic step for reducing noise is employed in the iterations.
摘要翻译： 公开了一种用于从测量数据重建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检查对象之间的相对旋转运动期间先前捕获测量数据。 在至少一个实施例中，修改测量数据以实现要重建的图像数据的特定灰度特性。 通过使用修改的测量数据的迭代算法计算图像数据，其中在迭代中不采用用于降低噪声的算术步骤。
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6.发明授权公开(公告)号：US08639003B2
公开(公告)日：2014-01-28
申请号：US12710423
申请日：2010-02-23
申请人： Herbert Bruder , Rainer Raupach
发明人： Herbert Bruder , Rainer Raupach
IPC分类号： G06K9/00
CPC分类号： G06T5/002 , G06T5/50 , G06T11/005 , G06T2207/10081 , G06T2207/10144 , G06T2207/20012 , G06T2207/20056 , G06T2207/20216 , G06T2207/30004
摘要： Method for the noise reduction of CT image data and an image processing system are disclosed, with a scanning of an examination object and generation of at least two CT image data records each taking place on the basis of a different x-ray energy spectrum. In at least one embodiment, a break-down of the data image records into at least two broken-down image data records takes place in each instance, with a lowest local frequency band (f(1)) with the index k=1 and at least one high local frequency band (f(k)) with the index k=2 to N. In at least one embodiment, the determination of the noise into at least one of the image data records per x-ray energy spectrum and calculation of at least one new image data record takes place in each instance by using an unchanged broken-down image data record with the lowest local frequency band and an image data record, generated from a noise-minimized weighted combination of broken-down image data records, which originate from the scannings using different x-ray energy spectra.
摘要翻译： 公开了用于CT图像数据的降噪的方法和图像处理系统，其中扫描检查对象并且基于不同的x射线能量谱产生至少两个CT图像数据记录。 在至少一个实施例中，数据图像记录分解成至少两个分解图像数据记录，每个情况下都具有索引k = 1的最低本地频带（f（1）），并且 至少一个具有索引k = 2至N的高本地频带（f（k））。在至少一个实施例中，将噪声确定为每个x射线能谱和计算中的至少一个图像数据记录 至少一个新的图像数据记录在每个实例中通过使用从分解图像数据记录的噪声最小化的加权组合产生的具有最低本地频带和图像数据记录的未变分解图像数据记录来进行 ，其来源于使用不同x射线能谱的扫描。
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公开(公告)号：US08605977B2
公开(公告)日：2013-12-10
申请号：US12874302
申请日：2010-09-02
申请人： Herbert Bruder , Rainer Raupach
发明人： Herbert Bruder , Rainer Raupach
IPC分类号： G06K9/00
CPC分类号： A61B6/032 , A61B6/4014 , A61B6/482 , A61B6/507 , G06T5/002 , G06T2207/10081 , G06T2207/20012 , G06T2207/30004 , H04N1/409
摘要： A method is disclosed for reconstruction of image data of an examination object from measured data, wherein the measured data was captured during a relative rotational motion between a radiation source of a computed tomography system and the examination object. Image data of the examination object is determined from the measured data. In at least one embodiment, new image data is obtained by noise-reducing processing of the image data, in which weighted high-pass filtering of the image data is performed, the weighting taking account of differences between pixel values of different pixels such that increasing differences result in a weaker high-pass effect. A noise-reducing smoothing of the image data is performed using the weighted high-pass filtering.
摘要翻译： 公开了一种用于从测量数据重建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检查对象之间的相对旋转运动期间捕获测量数据。 从测量数据确定检查对象的图像数据。 在至少一个实施例中，通过对图像数据进行加权高通滤波的图像数据的噪声降低处理来获得新的图像数据，加权考虑不同像素的像素值之间的差异，使得增加 差异导致较弱的高通效应。 使用加权高通滤波来执行图像数据的降噪平滑处理。
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公开(公告)号：US08600137B2
公开(公告)日：2013-12-03
申请号：US13111244
申请日：2011-05-19
IPC分类号： G06K9/00
CPC分类号： A61B6/5205 , A61B6/032 , A61B6/4014 , A61B6/4441 , A61B6/482 , A61B6/507 , G06T11/006 , G06T2211/424
摘要： A method is disclosed for reconstruction of image data of an object under examination from measurement data, with the measurement data having been captured during a relative rotational movement between a radiation source of a computed tomography system and the object under examination. In at least one embodiment, first image data is computed by the measurement data being modified to obtain a specific gray value characteristic of the first image data to be reconstructed and the first image data is computed by way of an iterative algorithm using the modified measurement data. Second image data is also computed by a series of chronologically-consecutive images being reconstructed and processing being carried out on the series of images to reduce temporal noise. Finally a combination of the first and the second image data is carried out.
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，其中测量数据已经在计算机断层摄影系统的辐射源与被检查物体之间的相对旋转运动期间被捕获。 在至少一个实施例中，通过修改的测量数据来计算第一图像数据，以获得要重建的第一图像数据的特定灰度特性，并且通过使用修改的测量数据的迭代算法来计算第一图像数据 。 还通过一系列按时间顺序重新连续的图像来计算第二图像数据，并且对该系列图像进行处理以减少时间噪声。 最后，执行第一和第二图像数据的组合。
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9.发明申请公开(公告)号：US20110293159A1
公开(公告)日：2011-12-01
申请号：US13111244
申请日：2011-05-19
IPC分类号： G06K9/00
CPC分类号： A61B6/5205 , A61B6/032 , A61B6/4014 , A61B6/4441 , A61B6/482 , A61B6/507 , G06T11/006 , G06T2211/424
摘要： A method is disclosed for reconstruction of image data of an object under examination from measurement data, with the measurement data having been captured during a relative rotational movement between a radiation source of a computed tomography system and the object under examination. In at least one embodiment, first image data is computed by the measurement data being modified to obtain a specific gray value characteristic of the first image data to be reconstructed and the first image data is computed by way of an iterative algorithm using the modified measurement data. Second image data is also computed by a series of chronologically-consecutive images being reconstructed and processing being carried out on the series of images to reduce temporal noise. Finally a combination of the first and the second image data is carried out.
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，其中测量数据已经在计算机断层摄影系统的辐射源与被检查物体之间的相对旋转运动期间被捕获。 在至少一个实施例中，通过修改的测量数据来计算第一图像数据，以获得要重建的第一图像数据的特定灰度特性，并且通过使用修改的测量数据的迭代算法来计算第一图像数据 。 还通过一系列按时间顺序重新连续的图像来计算第二图像数据，并且对该系列图像执行处理以减少时间噪声。 最后，执行第一和第二图像数据的组合。
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公开(公告)号：US07818046B2
公开(公告)日：2010-10-19
申请号：US11498798
申请日：2006-08-04
申请人： Herbert Bruder , Rainer Raupach
发明人： Herbert Bruder , Rainer Raupach
IPC分类号： A61B5/05
CPC分类号： A61B6/032 , A61B5/0402 , A61B5/0452 , A61B6/4441 , A61B6/5264 , A61B6/5288 , A61B6/541
摘要： In the course of an imaging method that is particularly suitable for creating an image data record of the heart and/or the blood vessels of a patient, a series of recording pulses, tuned to the cardiac rhythm, are derived from an ECG signal of the cardiac rhythm of the patient. The imaging is driven in a pulsed fashion from the series of recording pulses. In this case, an initial instant and a final instant of a future recording pulse are determined by taking account of at least one variability parameter characterizing the irregularity of the cardiac rhythm.
摘要翻译： 在特别适合于创建患者的心脏和/或血管的图像数据记录的成像方法的过程中，调整到心律的一系列记录脉冲是从心电图的ECG信号导出的 患者的心律。 成像以脉冲方式从一系列记录脉冲驱动。 在这种情况下，通过考虑表征心律不规则的至少一个变异性参数来确定未来记录脉冲的初始时刻和最终时刻。
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