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41. 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。

42. 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。

43. 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。

44. 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。

45. 发明授权

US08615122B2 Method for reduction of the radiation dose used within the framework of an X-ray imaging examination and CT system 有权
标题翻译：降低X射线成像检查和CT系统框架内使用的辐射剂量的方法
公开(公告)号：US08615122B2
公开(公告)日：2013-12-24
申请号：US13273504
申请日：2011-10-14
申请人： Herbert Bruder , Thomas Flohr , Rainer Raupach
发明人： Herbert Bruder , Thomas Flohr , Rainer Raupach
IPC分类号： G06K9/00 , A61B6/00
CPC分类号： A61B6/5258 , A61B6/5211 , G06T5/002 , G06T5/30 , G06T11/005 , G06T2207/10081 , G06T2207/20036 , G06T2207/20192
摘要： A method and an X-ray system are disclosed for reduction of the radiation dose used within the framework of an imaging X-ray examination. In at least one embodiment, for each pixel of a recorded image, structure information of a structure which may be present at a distance around the examined pixel is determined and a direction-dependent lowpass filter is applied to the pixel examined in each case, which filter's spatial coverage is less than the distance and which takes into account the morphological information of a structure which may be present with a direction-dependent weighting of the lowpass filter.
摘要翻译：公开了用于减少在成像X射线检查的框架内使用的辐射剂量的方法和X射线系统。在至少一个实施例中，对于记录图像的每个像素，确定可能存在于被检查像素周围的距离处的结构的结构信息，并且将方向依赖的低通滤波器应用于在每种情况下检查的像素，滤波器的空间覆盖小于距离，并且考虑到可能存在与低通滤波器的方向相关的加权的结构的形态信息。

46. 发明授权

US08396275B2 X-ray CT system and method for creating tomographic recordings with two x-ray energy spectra 有权
标题翻译： X射线CT系统和使用两个x射线能谱创建断层摄影记录的方法
公开(公告)号：US08396275B2
公开(公告)日：2013-03-12
申请号：US12588248
申请日：2009-10-08
申请人： Herbert Bruder , Thomas Flohr , Rainer Raupach
发明人： Herbert Bruder , Thomas Flohr , Rainer Raupach
IPC分类号： A61B6/03
CPC分类号： A61B6/482 , A61B6/032 , A61B6/4014 , A61B6/507
摘要： An x-ray CT system and a method are disclosed for creating tomographic recordings with the aid of an x-ray CT system, with two emitter/detector arrangements operating with an angular offset on a gantry with at least two different x-ray energy spectra. In at least one embodiment, at least one first recording is reconstructed from detector data from two quarter rotations with different x-ray energy spectra and at least one second recording is created from detector data of a scan of at least one of the emitter/detector arrangements over a half rotation. According to at least one embodiment of the invention, the recordings are subjected to high-pass filtering or low-pass filtering in respect of their spatial frequencies and then the filtered recordings are combined to give a resulting recording.
摘要翻译：公开了一种借助X射线CT系统创建断层摄影记录的X射线CT系统和方法，其中两个发射器/检测器装置在具有至少两个不同x射线能谱的台架上以角度偏移运动。在至少一个实施例中，至少一个第一记录是从具有不同X射线能量谱的二分之一旋转的检测器数据中重建的，并且至少一个第二记录是从发射器/检测器中的至少一个的扫描的检测器数据产生的安排半圈以上。根据本发明的至少一个实施例，记录对其空间频率进行高通滤波或低通滤波，然后组合滤波后的记录以得到最终记录。

47. 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。

48. 发明授权

US08306303B2 Method for improving the quality of computed tomography image series by image processing and CT system comprising a computational unit 有权
标题翻译：通过图像处理提高计算机断层摄影图像序列的质量的方法和包括计算单元的CT系统
公开(公告)号：US08306303B2
公开(公告)日：2012-11-06
申请号：US12314967
申请日：2008-12-19
申请人： Herbert Bruder , Thomas Flohr , Rainer Raupach
发明人： Herbert Bruder , Thomas Flohr , Rainer Raupach
IPC分类号： A61B6/03
CPC分类号： A61B6/507 , A61B6/481 , A61B6/504 , A61B6/541 , G06T5/002 , G06T5/10 , G06T11/006 , G06T2207/10081
摘要： A method, a computational unit and a CT system are disclosed for improving the quality of CT image series. In at least one embodiment, the method includes scanning an examination object over a period of time which permits the acquisition of at least two temporally offset projection data records of an identical recording region; generating at least two temporally offset tomographic image data records, each having a multiplicity of pixels, by reconstructing the projection data records; transforming the image data records into transformation data records of at least two spatial frequency ranges; calculating temporal fitted values of the transformation data records for some of the spatial frequency ranges, and replacing the values of the transformation data records which were fitted by the calculated fitted values; performing an inverse transform of the transformation data records with the fitted values to form new image data records; and displaying the new image data records.
摘要翻译：公开了一种提高CT图像系列质量的方法，计算单元和CT系统。在至少一个实施例中，该方法包括在允许获取相同记录区域的至少两个时间偏移的投影数据记录的一段时间内扫描检查对象; 通过重建投影数据记录来产生每个具有多个像素的至少两个时间偏移的断层图像数据记录; 将图像数据记录转换成至少两个空间频率范围的变换数据记录; 计算一些空间频率范围的变换数据记录的时间拟合值，并替换由计算的拟合值拟合的变换数据记录的值; 用拟合值对变换数据记录进行逆变换，形成新的图像数据记录; 并显示新的图像数据记录。

49. 发明授权

US08081732B2 Correcting transverse scattering in a multi-emitter CT scanner 有权
标题翻译：校正多发射CT扫描仪中的横向散射
公开(公告)号：US08081732B2
公开(公告)日：2011-12-20
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： G01N23/00
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。

50. 发明授权

US07860209B2 Method for imaging an organ, control device for a computed tomography system, computed tomography system and a computer program product 有权
标题翻译：用于成像器官的方法，用于计算机断层摄影系统的控制装置，计算机断层摄影系统和计算机程序产品
公开(公告)号：US07860209B2
公开(公告)日：2010-12-28
申请号：US12000831
申请日：2007-12-18
申请人： Herbert Bruder , Rainer Raupach
发明人： Herbert Bruder , Rainer Raupach
IPC分类号： H05G1/62 , G01N23/083
CPC分类号： A61B6/541 , A61B6/027
摘要： A method is described for imaging an organ in a human or animal body via a computed tomography system having an X-ray radiation source which rotates around the body along a circumferential ring. In at least one embodiment, the circumferential ring in each case is fixed in one position for recording of an image data segment on one slice plane during one revolution of the X-ray radiation source relative to the body, and the X-ray radiation source is triggered by a cycle signal which represents a movement cycle of the organ and is activated for a limited measurement time interval. In at least one embodiment, the circumferential ring is moved sequentially to further positions relative to the body between each of the recordings, in order to record image data on further slice planes. In at least one embodiment, the timing and duration of the measurement time interval for an image data segment to be recorded are dynamically matched to a structure of the cycle signal. Furthermore, in at least one embodiment, a control device for a computed tomography system and/or a computed tomography system having a control device such as this are described.
摘要翻译：描述了一种用于通过具有沿着圆周环围绕身体旋转的X射线辐射源的计算机断层摄影系统对人体或动物体内的器官进行成像的方法。在至少一个实施例中，每个情况下的圆周环固定在一个位置，用于在X射线辐射源相对于身体旋转一周期间在一个切片平面上记录图像数据段，并且X射线辐射源由表示器官的移动周期的周期信号触发，并在有限的测量时间间隔内被激活。在至少一个实施例中，为了将图像数据记录在另外的切片平面上，圆周环顺序移动到相对于身体在每个记录之间的更多位置。在至少一个实施例中，要记录的图像数据段的测量时间间隔的定时和持续时间与循环信号的结构动态匹配。此外，在至少一个实施例中，描述了具有诸如此类的控制装置的计算机断层摄影系统和/或计算机断层摄影系统的控制装置。

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