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41.发明授权公开(公告)号：US08588493B2
公开(公告)日：2013-11-19
申请号：US12849082
申请日：2010-08-03
IPC分类号： G06K9/00
CPC分类号： A61B6/032 , A61B5/0456 , A61B6/4014 , A61B6/482 , A61B6/503 , A61B6/507 , G06T11/006 , G06T2211/412 , G06T2211/424 , G06T2211/436
摘要： A method is disclosed for reconstructing image data of a moving examination object from measurement data, wherein the measurement data was captured in the course of a relative rotational movement between a radiation source of a computed tomography system and the examination object. In at least one embodiment of the method, a first image of the examination object is calculated from a complete measurement data record of the measurement data for an image reconstruction and a second image of the examination object is calculated from an incomplete measurement data record of the measurement data for an image reconstruction. Frequency splitting of the first and second images takes place respectively in at least one low-frequency and one higher-frequency component and the image data of the second image is supplemented in the low-frequency component with image data of the low-frequency component of the first image. In a further processing step the second image thus supplemented is improved using the first image, in that errors due to the incompleteness of the measurement data record of the second image are reduced.
摘要翻译： 公开了一种用于从测量数据重建运动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的过程中捕获测量数据。 在该方法的至少一个实施例中，根据用于图像重构的测量数据的完整测量数据记录来计算检查对象的第一图像，并且从不完整的测量数据记录计算检查对象的第二图像 用于图像重建的测量数据。 第一和第二图像的频率分割分别发生在至少一个低频和一个较高频分量中，并且第二图像的图像数据在低频分量中被补充，低频分量的图像数据是 第一张图片。 在另外的处理步骤中，使用第一图像来改善如此补充的第二图像，因为减少了由于第二图像的测量数据记录的不完备性造成的错误。
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公开(公告)号：US08442293B2
公开(公告)日：2013-05-14
申请号：US13018724
申请日：2011-02-01
CPC分类号： A61B6/4014 , A61B6/027 , A61B6/032 , A61B6/4441 , A61B6/482 , A61B6/507 , G01N23/046 , G01N2223/401 , G01N2223/419 , G01N2223/612 , G06T11/006 , G06T2211/432
摘要： A method is disclosed for reconstructing image data of an examination subject from measured data, wherein the measured data was acquired in the course of a relative rotational movement between a radiation source of a computed tomography system and the examination subject. A limited area between the radiation source and a detector represents a field of view in respect of which measured data can be acquired, and parts of the examination subject were located at least temporarily outside the field of view in the course of the measured data acquisition. In at least one embodiment, first image data is reconstructed from the measured data, and a boundary of the examination subject is determined with the aid of the first image data. The first image data is subsequently modified using the determined boundary, and projection data is calculated from the modified first image data. The measured data is modified using the projection data, and finally second image data is reconstructed from the modified measured data.
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与检查对象之间的相对旋转运动的过程中获取测量数据。 辐射源和检测器之间的有限区域表示可以获取测量数据的视野，并且在测量数据采集的过程中检查对象的部分至少临时定位在视场外。 在至少一个实施例中，从测量数据重建第一图像数据，借助于第一图像数据确定检查对象的边界。 随后使用所确定的边界修改第一图像数据，并且从修改的第一图像数据计算投影数据。 使用投影数据修改测量数据，最后从修改的测量数据重建第二图像数据。
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43.发明授权公开(公告)号：US08000433B2
公开(公告)日：2011-08-16
申请号：US10667475
申请日：2003-09-23
IPC分类号： A61B6/03
CPC分类号： G06T11/005 , A61B6/027 , A61B6/032 , A61B6/4085
摘要： A method is for image reconstruction for computed tomography with a non-one-dimensional, extended detector. The rays of the detector are weighted during the backprojection as a function of their position in the beam.
摘要翻译： 一种用于使用非一维扩展检测器进行计算机断层扫描的图像重建的方法。 在反投影期间，将检测器的光线作为其在光束中的位置的函数进行加权。
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公开(公告)号：US07940884B2
公开(公告)日：2011-05-10
申请号：US12729280
申请日：2010-03-23
IPC分类号： A61B6/00
CPC分类号： G06T11/006 , G06T2211/424
摘要： A method and an image reconstruction device are disclosed for reconstructing image data on the basis of input projection data obtained via an X-ray computerized tomography system. A target convolutional kernel is selected, which, when reconstructing image data from the input projection data using simple filtered back projection, would lead to target image characteristics. Image data is then reconstructed using an iterative reconstruction method of at least one embodiment. In at least one embodiment, the method includes a) reconstructing image data of a first iterative stage from the input projection data, b) generating synthetic projection data on the basis of the image data of the current iterative stage, c) forming difference projection data on the basis of the input projection data and the synthetic projection data, d) generating residue image data from the difference projection data, e) combining the residue image data with the image data of the current iterative stage to form image data of an additional iterative stage, wherein the image data of the current iterative stage is subjected to filtering before or during combination with the residue image data by using a regularization convolutional kernel which is determined on the basis of the selected target convolutional kernel, and f) repeating b) to e) until a termination condition occurs.
摘要翻译： 公开了一种基于通过X射线计算机断层摄影系统获得的输入投影数据来重构图像数据的方法和图像重建装置。 选择目标卷积核，当使用简单的过滤反投影从输入投影数据重建图像数据时，将导致目标图像特征。 然后使用至少一个实施例的迭代重建方法来重建图像数据。 在至少一个实施例中，该方法包括：a）从输入的投影数据重建第一迭代阶段的图像数据，b）基于当前迭代阶段的图像数据产生合成投影数据，c）形成差分投影数据 基于输入投影数据和合成投影数据，d）从差分投影数据生成残差图像数据，e）将残差图像数据与当前迭代阶段的图像数据组合以形成附加迭代图像数据 阶段，其中当前迭代阶段的图像数据在与剩余图像数据组合之前或之后通过使用基于所选择的目标卷积核确定的正则化卷积核进行滤波，以及f）重复b）至 e）直到发生终止条件。
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公开(公告)号：US20100177862A1
公开(公告)日：2010-07-15
申请号：US12686413
申请日：2010-01-13
申请人： Herbert Bruder , Thomas Flohr , Rainer Raupach
发明人： Herbert Bruder , Thomas Flohr , Rainer Raupach
CPC分类号： G06T11/006 , A61B6/027 , A61B6/507 , G06T2211/412 , G06T2211/421
摘要： A method is disclosed for scanning an examination object with a CT system and the generation of at least one computed tomographic sectional view from data obtained from the scanning and a CT system. In at least one embodiment, data used for generating the at least one sectional image is filtered out with different intensities as a function of a predetermined time range and/or projection angle range of the measurement of high local frequencies.
摘要翻译： 公开了一种用于使用CT系统扫描检查对象并从从扫描和CT系统获得的数据生成至少一个计算机断层图截面视图的方法。 在至少一个实施例中，用于产生至少一个截面图像的数据作为预定时间范围和/或高本地频率的测量的投影角范围的函数以不同的强度被滤除。
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46.发明授权Method for recording and evaluating image data with the aid of a tomography machine 有权借助于断层摄影机记录和评估图像数据的方法公开(公告)号：US07457450B2
公开(公告)日：2008-11-25
申请号：US11043965
申请日：2005-01-28
IPC分类号： G06K9/00
CPC分类号： A61B6/032 , A61B6/4035 , A61B6/405 , A61B6/482 , Y10S378/901
摘要： A method is for recording and evaluating image data with the aid of a tomography machine. At least two recordings with different spectral distribution are made of an examination area of an object. Further, measured data obtained from the two recordings are evaluated such that additional information relating to the examination area and/or a specific representation of the image of the examination area are/is obtained from the different spectral distributions. The tomography machine includes at least two separate recording systems. Further, it is operated such that the two recording systems operate with a different spectral distribution. As such, the additional information and the specific representation of an image can be obtained in conjunction with a reduced scanning time.
摘要翻译： 一种用于通过断层摄影机记录和评估图像数据的方法。 具有不同光谱分布的至少两个记录由对象的检查区域构成。 此外，评估从两个记录获得的测量数据，使得从不同的光谱分布获得与检查区域相关的附加信息和/或检查区域的图像的特定表示。 断层摄影机包括至少两个单独的记录系统。 此外，其操作使得两个记录系统以不同的光谱分布进行操作。 因此，附加信息和图像的具体表示可以结合减少的扫描时间来获得。
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47.发明申请公开(公告)号：US20060018424A1
公开(公告)日：2006-01-26
申请号：US11169913
申请日：2005-06-30
申请人： Herbert Bruder , Thomas Flohr , Ernst Klotz , Karl Stierstorfer
发明人： Herbert Bruder , Thomas Flohr , Ernst Klotz , Karl Stierstorfer
CPC分类号： A61B6/032 , A61B5/1075 , A61B6/027 , A61B6/4085 , A61B6/461 , G01N23/046 , G01N2223/419 , G01N2223/612
摘要： A method is disclosed for a multislice computer assisted tomograph, capable of carrying out a spiral scan of an object volume with a pitch p selected to be small enough that each slice of the object volume is multiply detected during the spiral scan. The method includes calculating, using measured data of two temporally consecutive at least one of revolutions and half revolutions, an image of the object volume from which a change inside the object volume between the two temporally consecutive at least one of revolutions and half revolutions is directly visible. An embodiment of the method can permit, for example, the detection and visualization of dynamic processes with an enhanced time resolution.
摘要翻译： 公开了一种用于多层计算机辅助断层摄影机的方法，其能够对所选择的节距p的物体体积进行螺旋扫描，所述间距p被选择为足够小，使得在螺旋扫描期间对对象体积的每个切片进行乘法检测。 该方法包括使用两个时间上连续的至少一个旋转和半圈的测量数据来计算在两个时间上连续的至少一个转和半转之间的对象体积内的变化直接从该物体体积的图像 可见。 该方法的实施例可以允许例如具有增强的时间分辨率的动态过程的检测和可视化。
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48.发明申请Method for producing tomograms of a periodically moving object with the aid of a focus/detector combination 审中-公开借助于焦点/检测器组合来产生周期性移动物体的断层图像的方法公开(公告)号：US20050175141A1
公开(公告)日：2005-08-11
申请号：US11038090
申请日：2005-01-21
申请人： Herbert Bruder , Thomas Flohr , Karl Stierstorfer
发明人： Herbert Bruder , Thomas Flohr , Karl Stierstorfer
CPC分类号： G06T11/006 , A61B6/027 , A61B6/032 , A61B6/4085 , A61B6/503 , A61B6/541 , B32B27/32 , G06T2211/412 , G06T2211/421
摘要： A method and a computed tomograph produce CT images of high resolution by circular scanning of a moving object by scanning sub-segments in a number of successive rest phases of an object under examination, and by respectively reconstructing and reformatting the sub-segments in order subsequently to add up a number of tomograms of the sub-segments. The sum of the sub-segments as a whole reproduce a complementary half segment of a circuit of the focus about the examination object. The moving object is thereby completely scanned, without lateral movement, by the beam being used.
摘要翻译： 一种方法和计算机断层摄影仪通过扫描运动物体的循环扫描来产生高分辨率的CT图像，通过扫描被检查物体的多个连续的休息阶段中的子段，并且随后分别重构和重新格式化子段 将各个分段的断层图相加。 子段的总和作为一个整体再现了关于检查对象的焦点的电路的互补半部分。 因此，通过所使用的梁完全扫描移动物体，而不会横向运动。
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49.发明申请Method for production of tomographic section images of a periodically moving object with a number of focus detector combinations 有权具有多个焦点检测器组合的周期性移动物体的断层图像的生成方法公开(公告)号：US20050111623A1
公开(公告)日：2005-05-26
申请号：US10995339
申请日：2004-11-24
申请人： Herbert Bruder , Thomas Flohr
发明人： Herbert Bruder , Thomas Flohr
CPC分类号： A61B6/541 , A61B6/027 , A61B6/032 , A61B6/4014 , A61B6/4085
摘要： A method is for production of tomographic section images, in particular X-ray CT images, of an at least partially periodically moving examination object with periodically changing movement and rest phases, preferably of a heart of a living being. A number of focus detector combinations are used, with the time resolution of the CT scanner being significantly increased by supplementary combination of detector data in the correct phase. On the one hand, a number of focus detector combinations which scan an examination object at the same time are used; and on the other hand a number of adjacent movement cycles of a periodically moving examination object are performed.
摘要翻译： 一种方法是用于生产至少部分周期性移动的检查对象的断层图像，特别是X射线CT图像，周期性地改变运动和休息阶段，优选地是生命的心脏。 使用多个焦点检测器组合，通过在正确相位中的检测器数据的补充组合，CT扫描仪的时间分辨率显着增加。 一方面，使用同时扫描检查对象的多个聚焦检测器组合; 另一方面，执行周期性移动的检查对象的多个相邻移动周期。
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50.发明授权Method for reduction of the radiation dose used within the framework of an X-ray imaging examination and CT system 有权降低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
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。
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