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1. 发明授权

US09993216B2 Creating a resultant image for a specifiable, virtual x-ray quanta energy distribution 有权
公开(公告)号：US09993216B2
公开(公告)日：2018-06-12
申请号：US15068554
申请日：2016-03-12
申请人： Thomas Flohr , Steffen Kappler , Rainer Raupach , Bernhard Schmidt
发明人： Thomas Flohr , Steffen Kappler , Rainer Raupach , Bernhard Schmidt
IPC分类号： A61B6/03 , A61B5/00 , A61B6/00
CPC分类号： A61B6/5205 , A61B5/0077 , A61B6/032 , A61B6/482
摘要： A method for creating a resultant image for a specifiable, virtual x-ray quanta energy distribution includes capturing a first image dataset of the patient, capturing at least one second image dataset of the patient, and specifying a virtual x-ray quanta energy distribution. The method also includes establishing a spatial density distribution of the patient for at least two materials based on the first image dataset and the at least one second image dataset. The method includes creating a third image dataset of the patient based on the specified virtual x-ray quanta energy distribution and the established spatial material density distributions. The third image dataset represents an x-ray attenuation distribution of the patient corresponding to the specified virtual x-ray quanta energy distribution. The method also includes creating the virtual image from the third image dataset.

2. 发明申请

US20160262713A1 CREATING A RESULTANT IMAGE FOR A SPECIFIABLE, VIRTUAL X-RAY QUANTA ENERGY DISTRIBUTION 有权
标题翻译：为可识别的虚拟X射线能量分配创建一个成像图像
公开(公告)号：US20160262713A1
公开(公告)日：2016-09-15
申请号：US15068554
申请日：2016-03-12
申请人： Thomas Flohr , Steffen Kappler , Rainer Raupach , Bernhard Schmidt
发明人： Thomas Flohr , Steffen Kappler , Rainer Raupach , Bernhard Schmidt
IPC分类号： A61B6/00 , A61B6/03 , A61B5/00
CPC分类号： A61B6/5205 , A61B5/0077 , A61B6/032 , A61B6/482
摘要： A method for creating a resultant image for a specifiable, virtual x-ray quanta energy distribution includes capturing a first image dataset of the patient, capturing at least one second image dataset of the patient, and specifying a virtual x-ray quanta energy distribution. The method also includes establishing a spatial density distribution of the patient for at least two materials based on the first image dataset and the at least one second image dataset. The method includes creating a third image dataset of the patient based on the specified virtual x-ray quanta energy distribution and the established spatial material density distributions. The third image dataset represents an x-ray attenuation distribution of the patient corresponding to the specified virtual x-ray quanta energy distribution. The method also includes creating the virtual image from the third image dataset.
摘要翻译：用于创建用于可指定的虚拟x射线量子能量分布的合成图像的方法包括捕获患者的第一图像数据集，捕获患者的至少一个第二图像数据集，以及指定虚拟x射线量子能量分布。该方法还包括基于第一图像数据集和至少一个第二图像数据集为至少两种材料建立患者的空间密度分布。该方法包括基于指定的虚拟x射线量子能量分布和建立的空间材料密度分布来创建患者的第三图像数据集。第三图像数据集表示对应于指定的虚拟x射线量子能量分布的患者的x射线衰减分布。该方法还包括从第三个图像数据集创建虚拟图像。

3. 发明授权

US08634625B2 Method for the reduction of image artifacts, in particular of metal artifacts, in CT image data 有权
标题翻译：在CT图像数据中减少图像伪像，特别是金属伪影的方法
公开(公告)号：US08634625B2
公开(公告)日：2014-01-21
申请号：US13107302
申请日：2011-05-13
申请人： Thomas Flohr , Bernhard Krauβ , Rainer Raupach , Bernhard Schmidt
发明人： Thomas Flohr , Bernhard Krauβ , Rainer Raupach , Bernhard Schmidt
IPC分类号： G06K9/00
CPC分类号： G06T5/002 , A61B6/5258 , G06T5/50 , G06T11/008 , G06T2200/04 , G06T2207/10081 , G06T2207/10144 , G06T2207/20221 , G06T2211/408
摘要： A method is disclosed for the reduction of image artifacts, in particular metal artifacts, during the generation of computed tomography image data of an object. In at least one embodiment of the method, two CT image data sets are generated with different medium x-ray energies. By way of a weighted combination of the two CT image data sets, a new image data set is calculated. The weighting factor employed in the weighted combination is here selected in such a way that the image artifacts in the new CT image data set are significantly reduced compared with the image artifacts in the two original CT image data sets. In this way it is possible in a simple manner significantly to reduce in particular metal artifacts in CT images.
摘要翻译：公开了一种在物体的计算机断层摄影图像数据的生成期间减少图像伪影，特别是金属伪像的方法。在该方法的至少一个实施例中，使用不同的中等x射线能量生成两个CT图像数据集。通过两个CT图像数据集的加权组合，计算新的图像数据集。在加权组合中使用的加权因子在这里被选择，使得与两个原始CT图像数据集中的图像伪像相比，新CT图像数据集中的图像伪影显着减少。以这种方式，可以以简单的方式显着地减少CT图像中的特定金属伪影。

4. 发明申请

US20110280458A1 Method For The Reduction Of Image Artifacts, In Particular Of Metal Artifacts, In CT Image Data 有权
标题翻译：用于减少图像伪影的方法，特别是金属人造物，CT图像数据
公开(公告)号：US20110280458A1
公开(公告)日：2011-11-17
申请号：US13107302
申请日：2011-05-13
申请人： Thomas Flohr , Bernhard Krauss , Rainer Raupach , Bernhard Schmidt
发明人： Thomas Flohr , Bernhard Krauss , Rainer Raupach , Bernhard Schmidt
IPC分类号： G06K9/00
CPC分类号： G06T5/002 , A61B6/5258 , G06T5/50 , G06T11/008 , G06T2200/04 , G06T2207/10081 , G06T2207/10144 , G06T2207/20221 , G06T2211/408
摘要： A method is disclosed for the reduction of image artifacts, in particular metal artifacts, during the generation of computed tomography image data of an object. In at least one embodiment of the method, two CT image data sets are generated with different medium x-ray energies. By way of a weighted combination of the two CT image data sets, a new image data set is calculated. The weighting factor employed in the weighted combination is here selected in such a way that the image artifacts in the new CT image data set are significantly reduced compared with the image artifacts in the two original CT image data sets. In this way it is possible in a simple manner significantly to reduce in particular metal artifacts in CT images.
摘要翻译：公开了一种在物体的计算机断层摄影图像数据的生成期间减少图像伪影，特别是金属伪像的方法。在该方法的至少一个实施例中，使用不同的中等x射线能量生成两个CT图像数据集。通过两个CT图像数据集的加权组合，计算新的图像数据集。在加权组合中使用的加权因子在这里被选择，使得与两个原始CT图像数据集中的图像伪像相比，新CT图像数据集中的图像伪影显着减少。以这种方式，可以以简单的方式显着地减少CT图像中的特定金属伪影。

5. 发明授权

US08355555B2 System and method for multi-image based virtual non-contrast image enhancement for dual source CT 有权
标题翻译：用于双源CT的基于多图像的虚拟非对比度图像增强的系统和方法
公开(公告)号：US08355555B2
公开(公告)日：2013-01-15
申请号：US12854341
申请日：2010-08-11
申请人： Yunqiang Chen , Tong Fang , Bernhard Schmidt , Rainer Raupach
发明人： Yunqiang Chen , Tong Fang , Bernhard Schmidt , Rainer Raupach
IPC分类号： G06K9/00
CPC分类号： G06T5/002 , G06T5/50 , G06T2207/10072 , G06T2207/20076 , G06T2207/20192 , G06T2207/30004 , G06T2207/30016
摘要： A method for enhancing a virtual non-contrast image, includes receiving a pair of dual scan CT images and calculating a virtual non-contrast image from the pair of CT images using known tissue attenuation coefficients. A conditional probability distribution is estimated for tissue at first and second points in each of the pair of CT images and the virtual non-contrast image as being the same type. A conditional probability distribution for tissue is estimated at the first and second points in each of the pair of CT images and the virtual non-contrast image as being of different types. An a posteriori probability of the tissue at the first and second points as being the same type is calculated from the conditional probability distributions, and an enhanced virtual non-contrast image is calculated using the a posteriori probability of the tissue at the first and second points as being the same type.
摘要翻译：一种用于增强虚拟非对比度图像的方法，包括接收一对双扫描CT图像，并使用已知的组织衰减系数从所述一对CT图像计算虚拟非对比度图像。对于一对CT图像和虚拟非对比度图像中的每一个中的第一和第二点处的组织估计为相同类型的条件概率分布。在一对CT图像和虚拟非对比度图像中的每一个中的第一和第二点处估计组织的条件概率分布为不同类型。根据条件概率分布计算第一和第二点处的组织作为相同类型的后验概率，并且使用在第一和第二点处的组织的后验概率来计算增强的虚拟非对比度图像作为同一类型。

6. 发明授权

US07856078B2 Method and X-ray CT system for generating computed tomography displays 有权
标题翻译：用于生成计算机断层显像的方法和X射线CT系统
公开(公告)号：US07856078B2
公开(公告)日：2010-12-21
申请号：US12153416
申请日：2008-05-19
申请人： Herbert Bruder , Rainer Raupach , Bernhard Schmidt
发明人： Herbert Bruder , Rainer Raupach , Bernhard Schmidt
IPC分类号： A61B6/00
CPC分类号： G06T11/005
摘要： A method is disclosed for generating computed tomography displays, in which with the aid of at least one X-ray source, an examination object is scanned in a rotationally circulating fashion with a measured dose rate dependent on the circulation angle, projection data are collected from a multiplicity of viewing angles, and at least similarly redundant projection data from angularly identical or angularly complementary projection angles with a different measured dose are interpolated with distance weighted relative to a projection value and are used for reconstruction. According to at least one embodiment of the invention, during the distance weighted interpolation of the at least similarly redundant projection data an additional noise optimizing weighting is carried out as a function of the noise present per projection value. Furthermore, an X-ray computed tomography system is disclosed for generating tomographic displays of an examination object with the aid of an arithmetic logic unit, including computer program code for evaluating detector data and carrying out a reconstruction, the arithmetic logic unit including program code that during operation executes at least one embodiment of the method.
摘要翻译：公开了一种用于生成计算机断层摄影显示的方法，其中借助于至少一个X射线源，以具有取决于循环角的测量剂量率的旋转循环方式扫描检查对象，从多个视角，以及与具有不同测量剂量的角度相同或角度互补的投影角度的至少相似的冗余投影数据以相对于投影值加权的距离进行内插，并用于重建。根据本发明的至少一个实施例，在至少类似地冗余的投影数据的距离加权内插期间，作为每个投影值存在的噪声的函数执行附加噪声优化加权。此外，公开了一种X射线计算机断层摄影系统，用于借助于包括用于评估检测器数据并执行重建的计算机程序代码的算术逻辑单元产生检查对象的断层图像显示，所述算术逻辑单元包括程序代码，在操作期间执行该方法的至少一个实施例。

7. 发明申请

US20080292171A1 Method and X-ray CT system for generating computed tomography displays 有权
标题翻译：用于生成计算机断层显像的方法和X射线CT系统
公开(公告)号：US20080292171A1
公开(公告)日：2008-11-27
申请号：US12153416
申请日：2008-05-19
申请人： Herbert Bruder , Rainer Raupach , Bernhard Schmidt
发明人： Herbert Bruder , Rainer Raupach , Bernhard Schmidt
IPC分类号： G06K9/00 , A61B6/00
CPC分类号： G06T11/005
摘要： A method is disclosed for generating computed tomography displays, in which with the aid of at least one X-ray source, an examination object is scanned in a rotationally circulating fashion with a measured dose rate dependent on the circulation angle, projection data are collected from a multiplicity of viewing angles, and at least similarly redundant projection data from angularly identical or angularly complementary projection angles with a different measured dose are interpolated with distance weighted relative to a projection value and are used for reconstruction. According to at least one embodiment of the invention, during the distance weighted interpolation of the at least similarly redundant projection data an additional noise optimizing weighting is carried out as a function of the noise present per projection value. Furthermore, an X-ray computed tomography system is disclosed for generating tomographic displays of an examination object with the aid of an arithmetic logic unit, including computer program code for evaluating detector data and carrying out a reconstruction, the arithmetic logic unit including program code that during operation executes at least one embodiment of the method.
摘要翻译：公开了一种用于生成计算机断层摄影显示的方法，其中借助于至少一个X射线源，以具有取决于循环角的测量剂量率的旋转循环方式扫描检查对象，从多个视角，以及与具有不同测量剂量的角度相同或角度互补的投影角度的至少相似的冗余投影数据以相对于投影值加权的距离进行内插，并用于重建。根据本发明的至少一个实施例，在至少类似地冗余的投影数据的距离加权内插期间，作为每个投影值存在的噪声的函数执行附加噪声优化加权。此外，公开了一种X射线计算机断层摄影系统，用于借助于包括用于评估检测器数据并执行重建的计算机程序代码的算术逻辑单元产生检查对象的断层图像显示，所述算术逻辑单元包括程序代码，在操作期间执行该方法的至少一个实施例。

8. 发明授权

US10290122B2 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.

9. 发明授权

US08509379B2 Method and X-ray device for adapting greyscale windowing 有权
标题翻译：用于适应灰度窗口的方法和X射线装置
公开(公告)号：US08509379B2
公开(公告)日：2013-08-13
申请号：US13360964
申请日：2012-01-30
申请人： Ute Feuerlein , Ernst Klotz , Rainer Raupach , Bernhard Schmidt
发明人： Ute Feuerlein , Ernst Klotz , Rainer Raupach , Bernhard Schmidt
IPC分类号： A61B6/00 , G06K9/00
CPC分类号： A61B6/032 , A61B6/405 , A61B6/481 , A61B6/5258 , A61B6/545 , A61B6/583 , G06T5/009 , H05G1/32
摘要： In a method and x-ray device to adapt the width and the position of a central value of a greyscale windowing for imaging with the x-ray device based on CT values determined with said x-ray device, the adaptation takes place within the scope of a determination and adjustment of an acquisition tube voltage of an x-ray tube of the x-ray device for an examination of a defined tissue of a patient, assuming a reference tube voltage for the examination of the defined tissue of the patient, and in which a width and position of a central value of the greyscale windowing that are associated with the reference tube voltage are automatically adapted to the acquisition tube voltage.
摘要翻译：在一种方法和x射线装置中，根据由所述X射线装置确定的CT值，使用x射线装置进行成像的灰度窗口的中心值的宽度和位置调整，适应范围在确定和调整x射线装置的X射线管的采集管电压，用于检查患者的确定的组织，假设用于检查患者的确定的组织的参考管电压，以及其中与参考管电压相关联的灰度窗口的中心值的宽度和位置自动适应于采集管电压。

10. 发明申请

US20100091937A1 X-RAY BEAM MODIFYING DIAPHRAGM AND DIAPHRAGM DEVICE 有权
标题翻译： X射线光束修改膜片和膜片装置
公开(公告)号：US20100091937A1
公开(公告)日：2010-04-15
申请号：US12570197
申请日：2009-09-30
申请人： Rainer Raupach , Bernhard Schmidt
发明人： Rainer Raupach , Bernhard Schmidt
IPC分类号： G21K1/04 , H05G1/60
CPC分类号： G21K1/10 , A61B6/032 , A61B6/06 , A61B6/4035 , G21K1/02
摘要： A diaphragm and diaphragm device for the specific manipulation of x-ray radiation that emanates from an x-ray focus of a CT apparatus and serves for scanning an examination subject, wherein the x-ray focus and the diaphragm arranged relatively near to the focus can be rotated together around a system axis (z-axis), and the diaphragm has movable diaphragm elements that dynamically adjust a diaphragm aperture (and therefore the spatial divergence of the x-rays passing through the diaphragm aperture). The diaphragm elements have a transmission factor for x-ray radiation that is different than zero. With such a diaphragm or diaphragm device the acquisition of the projection data necessary for the reconstruction of an artifact-free image of a region of interest (ROI) is possible with lower radiation exposure of the examination subject.
摘要翻译：一种隔膜和隔膜装置，用于对CT装置的x射线焦点产生的x射线辐射的特定操作，用于扫描检查对象，其中x射线焦点和相对靠近焦点布置的光阑可以围绕系统轴线（z轴）旋转在一起，并且隔膜具有可动的膜片元件，其可动态地调节光阑孔径（因此通过光阑孔径的x射线的空间发散）。隔膜元件具有不同于零的x射线辐射的透射系数。使用这种隔膜或隔膜装置，可以在检查对象的较低的辐射照射下获取重建感兴趣区域（ROI）的无伪像图像所需的投影数据。

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