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51. 发明申请

US20100189213A1 CORRECTING TRANSVERSE SCATTERING IN A MULTI-EMITTER CT SCANNER 有权
标题翻译：在多发射CT扫描仪中校正横向扫描
公开(公告)号：US20100189213A1
公开(公告)日：2010-07-29
申请号：US12753960
申请日：2010-04-05
申请人： Herbert Bruder , Rainer Raupach , Karl Stierstorfer
发明人： Herbert Bruder , Rainer Raupach , Karl Stierstorfer
IPC分类号： H05G1/60 , A61B6/03
CPC分类号： G01N23/046 , A61B6/032 , A61B6/4085 , A61B6/4241 , A61B6/482 , A61B6/5282 , G01N2223/206 , G01N2223/419
摘要： A multi-emitter computed tomography scanner is disclosed, including a plurality of x-ray emitter/detector arrangement pairs arranged offset at an angle to one another. In at least one embodiment, the detector arrangements of the pairs are designed to be energy selective.
摘要翻译：公开了一种多发射体计算机断层摄影扫描器，包括以彼此成角度偏移地设置的多个x射线发射器/检测器布置对。在至少一个实施例中，对的检测器布置被设计为能量选择性的。

52. 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。

53. 发明授权

US07440536B2 Method for scattered radiation correction of a CT system 有权
标题翻译： CT系统的散射辐射矫正方法
公开(公告)号：US07440536B2
公开(公告)日：2008-10-21
申请号：US11543836
申请日：2006-10-06
申请人： Herbert Bruder , Martin Petersilka , Rainer Raupach , Karl Stierstorfer
发明人： Herbert Bruder , Martin Petersilka , Rainer Raupach , Karl Stierstorfer
IPC分类号： G01N23/00
CPC分类号： G03B42/02 , A61B6/032 , A61B6/4014 , A61B6/5282 , A61B6/583
摘要： A method for scattered radiation correction of a CT system, including at least two focus/detector systems operated angularly offset from one another, is disclosed. In the method, at at least one phantom, similar to the examined object at least in a subregion, for at least one of the focus/detector systems, the scattered radiation intensity occurring is determined in the detector of a focus/detector system during the operation of the at least one focus of at least one other focus/detector system. Further, the spatial distribution thereof is stored for a number of angles of rotation of the focus/detector systems. During scanning of the object, the scattered radiation intensities, determined with the aid of a similar phantom that originate from the at least one other focus/detector system, are subtracted from the measured intensities of the first focus/detector system while taking account of the spatial orientation of the focus/detector systems and the beam respectively considered. Finally, absorption values are calculated with the aid of the intensity values thus corrected, and CT pictures or CT volume data are thereby reconstructed.
摘要翻译：公开了一种用于CT系统的散射辐射校正的方法，其包括彼此角度偏移地操作的至少两个焦点/检测器系统。在该方法中，至少在至少一个子区域中的被检查对象的至少一个体模，对于焦点/检测器系统中的至少一个，在焦点/检测器系统的检测器期间确定发生的散射辐射强度操作至少一个其它焦点/检测器系统的至少一个焦点。此外，其空间分布被存储为聚焦/检测器系统的多个旋转角度。在扫描对象期间，借助于来自至少一个其它焦点/检测器系统的类似幻影确定的散射辐射强度从所测量的第一焦点/检测器系统的强度中减去，同时考虑到分别考虑了焦点/探测器系统和光束的空间取向。最后，借助于如此校正的强度值来计算吸收值，由此重建CT图像或CT体积数据。

54. 发明申请

US20070232888A1 Method for reducing step artifacts in a cardio CT representation 有权
标题翻译：减少心脏CT表现中的步骤假象的方法
公开(公告)号：US20070232888A1
公开(公告)日：2007-10-04
申请号：US11727751
申请日：2007-03-28
申请人： Herbert Bruder , Rainer Raupach
发明人： Herbert Bruder , Rainer Raupach
IPC分类号： A61B5/05
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。

55. 发明申请

US20060146984A1 Method for determining at least one scaling factor for measured values of a computed tomography unit 审中-公开
标题翻译：用于确定计算机断层摄影单元的测量值的至少一个缩放因子的方法
公开(公告)号：US20060146984A1
公开(公告)日：2006-07-06
申请号：US11313732
申请日：2005-12-22
申请人： Herbert Bruder , Johannes Ebersberser , Rainer Raupach
发明人： Herbert Bruder , Johannes Ebersberser , Rainer Raupach
IPC分类号： A61B6/00 , G01N23/00 , G21K1/12 , H05G1/60
CPC分类号： A61B6/032 , A61B6/4014 , A61B6/583
摘要： A method is disclosed for determining at least one scaling factor for measured values obtained with the aid of a computed tomography unit. The computed tomography unit includes at least two recording systems that can rotate about a common rotation axis. Each of the systems includes an X-ray source and a detector having detector elements for detecting X-radiation emanating from the X-ray source. To reduce artifacts when use is made of measured values of the two recording systems in the reconstruction of an image, a scaling factor is determined for the measured values of the first or of the second recording system on the basis of measured values that originate from projections recorded from an object with the aid of the two recording systems. Each of the two recording systems is used to record at least one projection at at least substantially the same projection angle, whose measured values are compared with one another.
摘要翻译：公开了一种用于确定借助于计算机断层摄影单元获得的测量值的至少一个缩放因子的方法。计算机断层摄影单元包括可绕公共旋转轴线旋转的至少两个记录系统。每个系统包括X射线源和具有用于检测从X射线源发出的X射线的检测器元件的检测器。为了在图像重构中使用两个记录系统的测量值来减少伪像，基于来自投影的测量值来确定第一或第二记录系统的测量值的缩放因子借助于两个记录系统从物体记录。两个记录系统中的每一个用于以至少基本上相同的投影角度记录至少一个投影，其测量值彼此进行比较。

56. 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.

57. 发明申请

US20100195787A1 METHOD AND DEVICE FOR GENERATING A CT IMAGE WITH A HIGH TIME RESOLUTION 有权
标题翻译：用于产生具有高时间分辨率的CT图像的方法和装置
公开(公告)号：US20100195787A1
公开(公告)日：2010-08-05
申请号：US12695256
申请日：2010-01-28
申请人： Thomas Flohr , Rainer Raupach , Karl Stierstorfer
发明人： Thomas Flohr , Rainer Raupach , Karl Stierstorfer
IPC分类号： H05G1/60 , G06K9/00
CPC分类号： A61B6/482 , A61B6/032 , A61B6/4014 , A61B6/405 , A61B6/507 , A61B6/541
摘要： A method and a device are disclosed for generating a CT image with a high time resolution using a computed tomography scanner which has at least two recording systems which are operated at different X-ray energy spectra. In at least one embodiment of the process, CT images are firstly reconstructed in each case from a semi-rotation with the two recording systems, with irradiated lengths of the contrast agent-enriched structures and the soft tissue being calculated therefrom. Subsequently, a common X-ray energy is assumed and artificial measurement data records are calculated therefor, using the knowledge of the irradiated lengths for both recording systems at the same common X-ray energy. The artificial measurement data of respectively a quarter-rotation per recording system is then used to calculate the final CT image with a high time resolution. The method affords the use of dual-energy scans without losing the high time resolution available in dual-source systems.
摘要翻译：公开了一种用于使用计算机断层摄影扫描仪生成具有高时间分辨率的CT图像的方法和装置，该计算机断层摄影扫描仪具有在不同X射线能谱下操作的至少两个记录系统。在该过程的至少一个实施例中，首先在两个记录系统的半旋转中重建CT图像，其中计算富含造影剂的结构和软组织的照射长度。随后，假设使用常见的X射线能量，并且使用相同共同的X射线能量对两个记录系统的照射长度的知识来计算人造测量数据记录。然后使用每个记录系统的四分之一旋转的人造测量数据来计算具有高时间分辨率的最终CT图像。该方法提供双能量扫描的使用，而不会损失双源系统中可用的高时间分辨率。

58. 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。

59. 发明申请

US20070040831A1 Method for filtering of tomographic 3D displays on the basis of the reconstruction of volume data 有权
标题翻译：在体数据重建的基础上过滤断层3D显示的方法
公开(公告)号：US20070040831A1
公开(公告)日：2007-02-22
申请号：US11504593
申请日：2006-08-16
申请人： Thomas Flohr , Michael Grasruck , Rainer Raupach
发明人： Thomas Flohr , Michael Grasruck , Rainer Raupach
IPC分类号： G06T17/00
CPC分类号： G06T5/50 , G06T5/002 , G06T5/10 , G06T5/20 , G06T2200/04 , G06T2207/10072 , G06T2207/20056 , G06T2207/20192 , G06T2207/30004
摘要： A filter method for tomographic 3D displays is disclosed, in which a volume model is used for display, which reproduces the volume of the examination object in the form of a large number of three-dimensional image voxels, and the image value of each voxel reproduces one object-specific characteristic of the examination object in this volume. According to the method, the original image voxels are processed using a 2D filter which is the same over the entire image area, and two different linear filters with selected directions which are obtained from the extremes of the previously calculated variances thus resulting in three data records with differently filtered image voxels, and in which, furthermore, the original image voxels and the filtered image voxels are mixed using local weights to form a result image. In addition, original image data can be processed using a steepening linear filter with a filter direction in the direction of the maximum local variance, resulting in a data record which is mixed into the final image with locally different weighting.
摘要翻译：公开了一种用于断层3D显示的滤波方法，其中使用体积模型进行显示，其以大量三维图像体素的形式再现检查对象的体积，并且每个体素的图像值再现本卷中考试对象的一个特定对象特征。根据该方法，使用在整个图像区域上相同的2D滤波器处理原始图像体素，并且从先前计算的方差的极值获得具有所选方向的两个不同的线性滤波器，从而导致三个数据记录具有不同的滤波图像体素，此外，使用局部权重混合原始图像体素和滤波图像体素以形成结果图像。此外，可以使用具有沿最大局部方差方向的滤波器方向的陡峭线性滤波器来处理原始图像数据，导致以局部不同的权重混合到最终图像中的数据记录。

60. 发明申请

US20050190984A1 Method for filtering tomographic 3D images after completed reconstruction of volume data 失效
标题翻译：完成体积数据重建后的断层图像3D图像的滤波方法
公开(公告)号：US20050190984A1
公开(公告)日：2005-09-01
申请号：US11062703
申请日：2005-02-23
申请人： Daniel Fischer , Thomas Flohr , Rainer Raupach
发明人： Daniel Fischer , Thomas Flohr , Rainer Raupach
IPC分类号： G01T1/161 , A61B5/055 , A61B6/00 , A61B6/03 , G01N23/00 , G06K9/40 , G06T1/00 , G06T5/20 , G06T11/00 , G06T17/00 , G21K1/12 , H05G1/60
CPC分类号： G06T11/008
摘要： A method is for filtering tomographic 3D images of an examination object. The examination object is imaged by using a volume model that divides the volume of the examination object into a multiplicity of three-dimensional image voxels with individual image values, wherein the image value of each voxel reproduces an object-specific property of the examination object in this volume. After the reconstruction of the total volume for each voxel, variances are calculated in a prescribed region or radius R in order to determine contrast jumps and their spatial orientation with their tangential planes T. The image values in the tangential plane T are filtered with a two-dimensional convolution, and subsequently the original voxel data are mixed in weighted fashion with the filtered voxel data.
摘要翻译：一种用于过滤检查对象的断层图像3D图像的方法。通过使用将检查对象的体积分割成具有各个图像值的多个三维图像体素的体积模型对检查对象进行成像，其中，每个体素的图像值再现检查对象的特定对象属性这个卷。在重建每个体素的总体积之后，在规定的区域或半径R中计算方差，以便确定对比度跳跃及其与它们的切平面T之间的空间取向。切线平面T中的图像值用二并且随后原始体素数据以加权方式与经过滤的体素数据混合。

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