公开(公告)号：US09498177B2

公开(公告)日：2016-11-22

申请号：US12729272

申请日：2010-03-23

申请人： Herbert Bruder ,  Thomas Flohr ,  Rainer Raupach ,  Martin Sedlmair ,  Heinrich Wallschlager

发明人： Herbert Bruder ,  Thomas Flohr ,  Rainer Raupach ,  Martin Sedlmair ,  Heinrich Wallschlager

IPC分类号： G06K9/00 ,  A61B6/00 ,  A61B6/03 ,  G06T11/00

CPC分类号： A61B6/481 ,  A61B6/032 ,  A61B6/4014 ,  A61B6/4441 ,  A61B6/482 ,  A61B6/503 ,  A61B6/504 ,  A61B6/507 ,  A61B6/541 ,  G06T11/006 ,  G06T2211/424

摘要： A method is disclosed for reconstructing image data of an examination object from measured data, the measured data being captured during a rotating movement of a radiation source of a computed tomography system around the examination object. In at least one embodiment, different iteration images of the examination object are determined successively from the measured data by way of an iterative algorithm, wherein with the iterative algorithm the current iteration image at any one time is high-pass-filtered and weighted as a function of contrast using a variable which contains contrast information relating to the current iteration image at that time.

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，所测量的数据在计算机断层扫描系统的辐射源围绕检查对象的旋转运动期间被捕获。 在至少一个实施例中，通过迭代算法从测量数据连续地确定检查对象的不同迭代图像，其中利用迭代算法，任何时间的当前迭代图像被高通滤波并加权为 使用包含与当时的当前迭代图像有关的对比度信息的变量的对比度的功能。

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

IPC分类号： H05G1/60 ,  G06K9/00

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。

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

IPC分类号： A61B6/00 ,  A61B6/03 ,  G21K1/12 ,  G01N23/00 ,  H05G1/10 ,  H05G1/60

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。

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。

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。

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。

公开(公告)号：US20100027736A1

公开(公告)日：2010-02-04

申请号：US12458806

申请日：2009-07-23

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： A61B5/0456 ,  A61B6/027 ,  A61B6/032 ,  A61B6/503 ,  A61B6/504 ,  A61B6/541

摘要： A method is disclosed for producing tomographic images relating to different movement phases of a periodically moving object with the use of a tomography unit that includes a recording system that is arranged rotatably about a z-axis of the tomography unit, the recording system including an X-ray tube to which a tube current can be applied and a detector (17, 18) for acquiring projections. In at least one embodiment, the recording system is initially positioned relative to the object at a first z-position, and projections are acquired from a multiplicity of different projection dimensions at this z-position, in a fashion triggered by a movement signal representing the movement of the object, projections relating to a first movement phase of the object being acquired in a prospectively defined first time window and projections relating to at least a second movement phase of the object being acquired in a prospectively defined second time window. In at least one embodiment, a modulation of the tube current is performed in such a way that different tube current values are set in the first and the second time window to attain a prescribable different signal-to-noise ratio in the produced images. The recording system is then positioned sequentially at further z-positions, and respectively corresponding projections are acquired there for the two movement phases until a prescribed examination area is scanned at the desired z-positions. Tomographic images are reconstructed in real time or subsequently on the basis of the obtained projections.

摘要翻译： 公开了一种利用断层摄影单元生成与周期性运动物体的不同移动相位相关的断层图像的方法，所述断层摄影单元包括绕所述断层摄影单元的z轴可旋转地设置的记录系统，所述记录系统包括X 可以施加管电流的射线管和用于获取突起的检测器（17,18）。 在至少一个实施例中，记录系统首先在第一z位置处相对于物体定位，并且以该Z位置上的多个不同的投影尺寸获取投影，其方式是由表示 物体的移动，与在前瞻性定义的第一时间窗口中获取的物体的第一移动阶段有关的投影以及与在前瞻性定义的第二时间窗口中获取的物体的至少第二移动阶段有关的投影。 在至少一个实施例中，以这样的方式执行管电流的调制，使得在第一和第二时间窗中设置不同的管电流值，以在所产生的图像中获得规定的不同的信噪比。 然后将记录系统顺序地定位在更进一步的z位置，并且分别在两个移动阶段获取对应的投影，直到在期望的z位置扫描规定的检查区域。 断层扫描图像可以实时重建，或随后根据获得的投影进行重构。

公开(公告)号：US20090161935A1

公开(公告)日：2009-06-25

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： G06K9/00

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时间段上扫描检查对象; 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。

公开(公告)号：US20090141855A1

公开(公告)日：2009-06-04

申请号：US12292462

申请日：2008-11-19

申请人： Herbert Bruder ,  Thomas Flohr

发明人： Herbert Bruder ,  Thomas Flohr

IPC分类号： A61B6/00 ,  G06K9/00

CPC分类号： A61B6/504 ,  A61B5/11 ,  A61B6/027 ,  A61B6/032 ,  A61B6/5264 ,  A61B6/527 ,  A61B6/541

摘要： At least one embodiment of the present invention relates to a CT scanner and/or a method for helical scanning of an examination object which has at least one portion undergoing periodic motion. In at least one embodiment, the CT scanner includes at least one bearing apparatus, arranged along a system axis of the CT scanner, for bearing the examination object, two scanning systems which can rotate around the system axis and which are arranged coaxially, respectively having a focus from which a beam can be emitted and a flat-design detector array, arranged opposite the respective focus, including a multiplicity of distributed detector elements which can detect the rays of the beam, wherein projection data can be generated by the scanning systems which represents the attenuation of the rays while traversing the examination object, and wherein the bearing apparatus and/or the scanning systems can be displaced along the system axis, a first device/module, preferably an EKG, which can detect and store rest and movement phases of the examination object which has at least one portion undergoing periodic motion in the form of measurement data, and a second device/module which can, based on the measurement data and/or data derived therefrom, trigger and/or control a displacement of the scanning systems and/or the bearing apparatus along the system axis.

摘要翻译： 本发明的至少一个实施例涉及一种用于螺旋扫描检查对象的CT扫描器和/或方法，所述检查对象具有至少一部分经历周期性运动。 在至少一个实施例中，CT扫描器包括至少一个轴承装置，沿着CT扫描仪的系统轴线布置，用于支承检查对象，两个扫描系统可以围绕系统轴线旋转并且同轴地布置，分别具有 可以发射光束的焦点和与相应焦点相对布置的平面设计检测器阵列，包括可以检测光束的多个分布式检测器元件，其中投影数据可以由扫描系统产生， 表示穿过检查对象时的光线的衰减，并且其中轴承装置和/或扫描系统可以沿着系统轴线移位，第一装置/模块，优选地EKG，其可以检测和存储静止和移动阶段 所述检查对象具有以测量数据的形式进行周期性运动的至少一部分的检查对象;以及第二装置/模块， 根据测量数据和/或从其导出的数据，触发和/或控制扫描系统和/或轴承装置沿着系统轴的位移。

公开(公告)号：US20080130829A1

公开(公告)日：2008-06-05

申请号：US11978580

申请日：2007-10-30

申请人： Herbert Bruder ,  Thomas Flohr

发明人： Herbert Bruder ,  Thomas Flohr

IPC分类号： H05G1/26 ,  A61B6/02

CPC分类号： A61B6/4085 ,  A61B6/027 ,  A61B6/032 ,  A61B6/4014 ,  A61B6/503 ,  A61B6/5264

摘要： A method and a CT system are disclosed for determining movement and rest phases of a partial object that moves at times in an examination object during a CT examination. In at least one embodiment, at least two different radiation sources are used for the comparative measurement, and a first radiation source emits a first fan beam at a specific rotation angle at a first instant, the absorption of said beam being measured in beamwise fashion, a second radiation source emits a second fan beam, at the same rotation angle at a second, later instant, the absorption of the beam likewise being measured in beamwise fashion, and the relative movement or relative rest of the partial object between the first and second instants is deduced by comparing deviating absorption values of a multiplicity of spatially equivalent and equidirectional fan beams proceeding from the same angular position of the radiation sources.

摘要翻译： 公开了一种用于确定在CT检查期间在检查对象中有时移动的部分对象的运动和休息阶段的方法和CT系统。 在至少一个实施例中，至少两个不同的辐射源用于比较测量，并且第一辐射源在第一时刻以特定旋转角发射第一扇形光束，所述光束的吸收以波束方式测量， 第二辐射源以相同的旋转角度在第二次稍后的瞬间发射第二扇形光束，同样以波束方式测量光束的吸收，并且部分物体在第一和第二辐射源之间的相对运动或相对静止 通过比较从辐射源的相同角度位置进行的多个空间等效和等向风扇光束的偏离吸收值来推断瞬时。