公开(公告)号：US08873704B2

公开(公告)日：2014-10-28

申请号：US13369630

申请日：2012-02-09

申请人： Karl Stierstorfer

发明人： Karl Stierstorfer

IPC分类号： G21K1/12 ,  A61B6/00 ,  A61B6/03 ,  G21K1/10

CPC分类号： A61B6/032 ,  A61B6/4035 ,  G21K1/10

摘要： A filter for an x-ray device to shape an intensity profile of x-ray radiation emanating from an x-ray source of the device has a filter body made of a material that attenuates x-ray radiation. The filter body is designed with a propeller shape and has two blades connected by an axle of the filter. The filter body is rotatable around the axle, which is permeable to the x-ray radiation. The x-ray device embodies at least one such filter.

摘要翻译： 用于形成从装置的x射线源发出的x射线辐射的强度分布的x射线装置的滤光器具有由能够衰减x射线辐射的材料制成的过滤体。 过滤器主体设计有螺旋桨形状，并具有通过过滤器轴连接的两个叶片。 过滤器主体可围绕轴旋转，该轴可透过X射线辐射。 x射线装置至少包含一个这样的过滤器。

公开(公告)号：US08600137B2

公开(公告)日：2013-12-03

申请号：US13111244

申请日：2011-05-19

申请人： Herbert Bruder ,  Rainer Raupach ,  Karl Stierstorfer

发明人： Herbert Bruder ,  Rainer Raupach ,  Karl Stierstorfer

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。

公开(公告)号：US20120069950A1

公开(公告)日：2012-03-22

申请号：US13233071

申请日：2011-09-15

申请人： Michael Grasruck ,  Karl Stierstorfer

发明人： Michael Grasruck ,  Karl Stierstorfer

IPC分类号： A61B6/02 ,  A61B6/03

CPC分类号： G01N23/04 ,  A61B6/02 ,  A61B6/032 ,  A61B6/4021 ,  G01N2223/1016 ,  G01N2223/414

摘要： A method and an X-ray device are disclosed for creating an X-ray projection image of a three-dimensional object under examination and for displaying the projection image. In at least one embodiment, pixel images are recorded from two different perspectives and a projection image is created by overlaying the two pixel images, wherein perspective-related offset of the mapping image pixels is taken into account, pixel-by-pixel, in relation to an imaging surface in the object under examination.

摘要翻译： 公开了一种用于创建被检查的三维物体的X射线投影图像并用于显示投影图像的方法和X射线装置。 在至少一个实施例中，从两个不同的角度记录像素图像，并且通过重叠两个像素图像来创建投影图像，其中映射图像像素的透视相关偏移被逐个像素地考虑在内 到被检查物体中的成像表面。

公开(公告)号：US20110293159A1

公开(公告)日：2011-12-01

申请号：US13111244

申请日：2011-05-19

申请人： Herbert Bruder ,  Rainer Raupach ,  Karl Stierstorfer

发明人： Herbert Bruder ,  Rainer Raupach ,  Karl Stierstorfer

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。

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。

公开(公告)号：US20100074397A1

公开(公告)日：2010-03-25

申请号：US12585579

申请日：2009-09-18

申请人： Steffen Kappler ,  Christian Schröter ,  Karl Stierstorfer ,  Matthias Strassburg

发明人： Steffen Kappler ,  Christian Schröter ,  Karl Stierstorfer ,  Matthias Strassburg

IPC分类号： H05G1/60 ,  G01T1/24 ,  A61B6/00

CPC分类号： G01T1/17 ,  G01T1/24

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幅度特性的电脉冲，其中预定数量的阈值能量。 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。

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。

公开(公告)号：US07623618B2

公开(公告)日：2009-11-24

申请号：US11896213

申请日：2007-08-30

申请人： Karl Stierstorfer

发明人： Karl Stierstorfer

IPC分类号： A61B6/00

CPC分类号： G03B42/02 ,  A61B6/583 ,  A61B6/585 ,  G01N23/046 ,  G01N2223/419 ,  H04N5/325

摘要： The present invention relates to a method for scattered radiation correction in X-ray imaging, and to an X-ray imaging system for carrying out the method. In the method, measurement signals t from an X-ray detector (9) are digitized and converted to logarithmic form, with these measurement signals t having been obtained by radiation through an examination object (10) by the X-ray detector (9). Correction values which have been obtained from a series development of a logarithm ln(1−s/t) are subtracted from the measurement signals that have been converted to logarithmic form, with this series development being terminated at the earliest after the first order, where s denotes a previously determined scattered radiation signal from radiation passed through the examination object (10). The method and the associated X-ray imaging system allow scattered radiation to be corrected for with increased accuracy, on the basis of measurement signals that had been converted to logarithmic form.

摘要翻译： 本发明涉及X射线成像中的散射辐射校正方法以及用于实施该方法的X射线成像系统。 在该方法中，来自X射线检测器（9）的测量信号t被数字化并转换为对数形式，其中这些测量信号t已经通过X射线检测器（9）通过检查对象（10）进行辐射而获得， 。 从已经被转换为对数形式的测量信号中减去从对数ln（1-s / t）的系列展开获得的校正值，该系列开发在第一阶以后最早终止，其中 s表示来自经过检查对象（10）的辐射的预先确定的散射辐射信号。 该方法和相关的X射线成像系统基于已经被转换成对数形式的测量信号，允许以更高的精度校正散射辐射。

公开(公告)号：US20090141857A1

公开(公告)日：2009-06-04

申请号：US12292372

申请日：2008-11-18

申请人： Rainer Raupach ,  Karl Stierstorfer

发明人： Rainer Raupach ,  Karl Stierstorfer

IPC分类号： H05G1/60

CPC分类号： A61B6/032 ,  A61B6/037 ,  A61B6/5205 ,  A61B6/583 ,  A61B6/585 ,  G01T1/2985 ,  G01T7/005

摘要： Methods for post-processing raw detector signals of an x-ray or gamma detector are disclosed. According to at least one embodiment of the invention, raw detector signals are filtered, an associated filtered signal is determined at least for a subset of the raw detector signals, and those filtered signals whose signal value is less than zero are then respectively replaced by a signal value greater than zero.

摘要翻译： 公开了用于后处理x射线或γ检测器的原始检测器信号的方法。 根据本发明的至少一个实施例，对原始检测器信号进行滤波，至少对于原始检测器信号的子集确定相关联的滤波信号，并且那些信号值小于零的那些滤波信号分别被替换为 信号值大于零。

公开(公告)号：US20090124892A1

公开(公告)日：2009-05-14

申请号：US12289441

申请日：2008-10-28

申请人： Herbert Bruder ,  Karl Stierstorfer ,  Carsten Thierfelder

发明人： Herbert Bruder ,  Karl Stierstorfer ,  Carsten Thierfelder

IPC分类号： A61B6/03

CPC分类号： A61B6/481 ,  A61B6/503 ,  A61B6/507 ,  A61B6/541 ,  A61B6/589 ,  G01R33/5601 ,  G01R33/56366

摘要： A method and a CT system are disclosed for measuring the perfusion in vessels and/or muscles of the heart (cardiac perfusion) in a patient. In at least one embodiment of the method the patient receives a contrast agent bolus, the patient is scanned for a scan period of a plurality of cardiac cycles in a scan field of a CT system controlled by the cardiac rhythm, a plurality of CT image data is reconstructed from projection data of a particular cardiac phase from respectively one cardiac cycle, and the temporal profile of the absorption values at at least one location in the heart is determined and displayed on the basis of a plurality of CT image data at successive times. At least one embodiment of the invention is distinguished by the fact that during the examination, the patient is repeatedly and alternately moved in opposite directions along a system axis of the CT system such that his cardiac region passes through the scan field at a cardiac phase range and the cardiac region is completely scanned spirally.

摘要翻译： 公开了用于测量患者血管和/或心脏肌肉（心脏灌注）的灌注的方法和CT系统。 在该方法的至少一个实施方案中，患者接受造影剂推注，在由心律控制的CT系统的扫描场中扫描患者多个心动周期的扫描周期，多个CT图像数据 从特定心脏相位的投影数据分别从一个心动周期重构，并且基于连续的多个CT图像数据来确定和显示心脏中至少一个位置处的吸收值的时间分布。 本发明的至少一个实施例的特征在于，在检查期间，患者沿着CT系统的系统轴线沿相反方向重复地和交替地移动，使得他的心脏区域在心脏相位范围内通过扫描场 并且心脏区域被螺旋地完全扫描。