公开(公告)号：US20100246917A1

公开(公告)日：2010-09-30

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

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：US20100092060A1

公开(公告)日：2010-04-15

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： G06K9/00

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射线能量光谱的二分之一旋转的检测器数据重建的，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的记录。

公开(公告)号：US20050089134A1

公开(公告)日：2005-04-28

申请号：US10762795

申请日：2004-01-22

申请人： Herbert Bruder ,  Thomas Flohr ,  Karlheinz Pauli ,  Juergen Simon

发明人： Herbert Bruder ,  Thomas Flohr ,  Karlheinz Pauli ,  Juergen Simon

IPC分类号： A61B6/03 ,  G01N23/04 ,  G21K1/12 ,  A61B6/00 ,  G01N23/00 ,  H05G1/60

CPC分类号： A61B6/032 ,  A61B6/4021 ,  A61B6/4085 ,  G01N23/046 ,  G01N2223/419 ,  G01N2223/612

摘要： An imaging tomography apparatus, in particular an x-ray computed tomography apparatus, has two acquisition systems capable of rotating around a common rotation axis. Each of the acquisition systems has a radiator as well as a detector. The maximum measurement fields scanned by the two acquisition systems given rotation around the rotation axis are of different sizes, or can be adjusted to different sizes. In particular, the lengths of both detectors measured in the azimuthal direction—are of different sizes. The tomography apparatus can be fashioned to scan the entire body cross-section of an examination subject or of a patient with conventional temporal resolution, and to scan detail region, such as a heart region, with an increased temporal resolution or accelerated data acquisition rate in comparison to a device with only one acquisition system.

摘要翻译： 成像断层摄影装置，特别是X射线计算机断层摄影装置，具有能够围绕公共旋转轴旋转的两个采集系统。 每个采集系统都有散热器和检测器。 由旋转轴旋转的两个采集系统扫描的最大测量场具有不同的尺寸，或可调整为不同的尺寸。 特别地，在方位角方向上测量的两个检测器的长度具有不同的尺寸。 层析摄影装置可以被形成为扫描具有常规时间分辨率的检查对象或患者的整个身体横截面，并且以增加的时间分辨率或加速的数据获取速率扫描诸如心脏区域的细节区域 与仅具有一个采集系统的设备进行比较。

公开(公告)号：US08189734B2

公开(公告)日：2012-05-29

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： A61B6/00

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：US07970097B2

公开(公告)日：2011-06-28

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： A61B6/00

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：US07856077B2

公开(公告)日：2010-12-21

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： G01N23/00

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扫描仪包括至少一个轴承装置，沿着CT扫描器的系统轴线布置，用于支承检查对象，两个扫描系统可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：US07656992B2

公开(公告)日：2010-02-02

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： A61B6/03

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。

公开(公告)号：US07486762B2

公开(公告)日：2009-02-03

申请号：US10556943

申请日：2004-04-23

申请人： Herbert Bruder ,  Thomas Flohr ,  Matthias Niethammer

发明人： Herbert Bruder ,  Thomas Flohr ,  Matthias Niethammer

IPC分类号： G01N23/00

CPC分类号： A61B6/032 ,  A61B6/027 ,  A61B6/4085

摘要： A method is disclosed for the production of CT images via a CT spiral reconstruction of object for examination moving in partial areas in a cyclical manner and a CT device therefor. During scanning of the object to be examined, various rates of advancement are used, irrespective of whether the scanned area is at least partially cyclically displaced or is stationary.

摘要翻译： 公开了一种用于通过用于检查的物体的CT螺旋重建用于生产CT图像以在周期性部分区域中移动的方法和用于其的CT装置的方法。 在扫描被检查物体的过程中，不管扫描区域是否至少部分地循环移位或静止，都使用各种提前速度。

公开(公告)号：US20070092057A1

公开(公告)日：2007-04-26

申请号：US10556943

申请日：2004-04-23

申请人： Herbert Bruder ,  Thomas Flohr ,  Matthias Niethammer

发明人： Herbert Bruder ,  Thomas Flohr ,  Matthias Niethammer

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

CPC分类号： A61B6/032 ,  A61B6/027 ,  A61B6/4085

摘要： A method is disclosed for the production of CT images via a CT spiral reconstruction of object for examination moving in partial areas in a cyclical manner and a CT device therefor. During scanning of the object to be examined, various rates of advancement are used, irrespective of whether the scanned area is at least partially cyclically displaced or is stationary.

摘要翻译： 公开了一种用于通过用于检查的物体的CT螺旋重建用于生产CT图像以在周期性部分区域中移动的方法和用于其的CT装置的方法。 在扫描被检查物体的过程中，不管扫描区域是否至少部分地循环移位或静止，都使用各种提前速度。

公开(公告)号：US20050111622A1

公开(公告)日：2005-05-26

申请号：US10991454

申请日：2004-11-19

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 ,  A61B6/503 ,  Y10S378/901

摘要： A method and CT scanner are proposed for the production of tomographic section images, in particular X-ray CT images, of a periodically moving object with periodically changing movement and rest phases. For scanning, a number of focus detector combinations with flat detectors are moved on coaxial spiral paths and movement signals from the moving object are measured at the same time in order to detect movement and rest phases. Further, the time correlation between the movement data and the detector output data stored and axial segment image stacks are then reconstructed independently of one another from sub-segments of the spiral paths using the detector output data from each detector which represent a rest phase of the moving object. Additionally, segment image stacks from the n spiral paths of the n focus detector combinations at the correct time are added up in a complementary angle form and in layers to form 180° tomography section images. The axial segment image stacks are reconstructed in a first step from double-inclined reconstruction planes. Further, in a second step, they are reformatted to produce axial segment image stacks, and detector data from a number of successive movement periods are used for this purpose.

摘要翻译： 提出了一种方法和CT扫描仪，用于生产具有周期性变化的运动和休息阶段的周期性移动物体的断层图像，特别是X射线CT图像。 为了进行扫描，将多个具有平面检测器的焦点检测器组合在同轴螺旋路径上移动，并且同时测量来自移动物体的运动信号，以便检测运动和休止阶段。 此外，使用来自每个检测器的检测器输出数据，代表休息阶段，运动数据和存储的检测器输出数据和轴段图像堆叠之间的时间相关性由螺旋路径的子段彼此独立地重建， 移动物体 此外，来自n个聚焦检测器组合在正确时间的n个螺旋路径的分段图像堆叠以互补的角度形式和层叠相加以形成180°断层摄影部分图像。 从双重重构平面的第一步重建轴向段图像堆叠。 此外，在第二步骤中，它们被重新格式化以产生轴向段图像堆叠，并且为此目的使用来自多个连续移动周期的检测器数据。