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：US06859512B2

公开(公告)日：2005-02-22

申请号：US10477628

申请日：2002-05-16

申请人： Herbert Bruder ,  Thomas Flohr ,  Karl Stierstorfer

发明人： Herbert Bruder ,  Thomas Flohr ,  Karl Stierstorfer

IPC分类号： A61B6/03 ,  G06T1/00 ,  G06T11/00

CPC分类号： A61B6/032 ,  A61B6/027 ,  A61B6/4085 ,  A61B6/467 ,  A61B6/469 ,  G06T11/005 ,  Y10S378/901

摘要： Cone-beam computed tomography method to scan an object using a multi-row detector system. The focal point is displaced on a focal path about the system axis, without any relative movement between the object to be examined and the focal point, in the direction of the system axis. The detector system supplies measuring data corresponding to the received radiation and the length of the focal path is at least the same as the length of a partial contour interval, the length of the interval being sufficient for completely reconstructing a CT image. Raw images are calculated from measuring data from a partial contour interval, the planes of the images thereof being inclined in relation to a central plane containing the focal path, and a plurality of raw images are collected to form a CT image.

摘要翻译： 锥束计算机断层摄影法使用多行检测器系统扫描物体。 焦点在系统轴的焦点路径上移动，而不会在系统轴方向上在待检查对象与焦点之间进行任何相对移动。 检测器系统提供与所接收的辐射相对应的测量数据，并且焦点路径的长度至少与部分轮廓间隔的长度相同，间隔的长度足以完全重建CT图像。 原始图像是从部分轮廓间隔的测量数据计算的，其图像的平面相对于包含焦点路径的中心平面倾斜，并且收集多个原始图像以形成CT图像。

公开(公告)号：US08553962B2

公开(公告)日：2013-10-08

申请号：US13164796

申请日：2011-06-21

申请人： Thomas Allmendinger ,  Herbert Bruder ,  Thomas Flohr ,  Rainer Raupach ,  Harald Schöndube ,  Karl Stierstorfer

发明人： Thomas Allmendinger ,  Herbert Bruder ,  Thomas Flohr ,  Rainer Raupach ,  Harald Schöndube ,  Karl Stierstorfer

IPC分类号： G06K9/00 ,  A61B6/00

CPC分类号： A61B6/032 ,  A61B6/4441 ,  A61B6/481 ,  A61B6/486 ,  A61B6/503 ,  A61B6/507 ,  A61B6/5211 ,  A61B6/5264 ,  A61B6/5288 ,  A61B2090/3762 ,  G06T5/002 ,  G06T5/50 ,  G06T11/006 ,  G06T2207/10081 ,  G06T2207/20221 ,  G06T2207/30048 ,  G06T2211/412 ,  G06T2211/436

摘要： A method is disclosed for the reconstruction of picture data of a moving object under examination from measurement, with the measurement data having been recorded beforehand for a relative rotational movement between a radiation source of a computed tomography system and the object under examination. In at least one embodiment, first picture data is computed from a complete measurement dataset of the measurement data for a picture reconstruction, and second picture data is computed from an incomplete measurement dataset for a computed tomography picture reconstruction. The first picture data and the second picture data are combined into third picture data, with the combination being computed using location-dependent movement information of the object under examination.

摘要翻译： 公开了一种用于重建从测量中检查的移动物体的图像数据的方法，其中测量数据已被预先记录在计算机断层摄影系统的辐射源和被检查物体之间的相对旋转运动。 在至少一个实施例中，从用于图像重建的测量数据的完整测量数据集计算第一图像数据，并且从用于计算机断层摄影图像重建的不完整测量数据集计算第二图像数据。 将第一图像数据和第二图像数据组合成第三图像数据，使用正在检查的对象的位置相关运动信息来计算组合。

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：US20110188723A1

公开(公告)日：2011-08-04

申请号：US13018724

申请日：2011-02-01

申请人： Herbert Bruder ,  Thomas Flohr ,  Rainer Raupach ,  Karl Stierstorfer

发明人： Herbert Bruder ,  Thomas Flohr ,  Rainer Raupach ,  Karl Stierstorfer

IPC分类号： G06K9/00

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。

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：US20110033097A1

公开(公告)日：2011-02-10

申请号：US12849082

申请日：2010-08-03

申请人： Herbert Bruder ,  Thomas Flohr ,  Rainer Raupach ,  Karl Stierstorfer

发明人： Herbert Bruder ,  Thomas Flohr ,  Rainer Raupach ,  Karl Stierstorfer

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。

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：US07505553B2

公开(公告)日：2009-03-17

申请号：US11100445

申请日：2005-04-07

申请人： Herbert Bruder ,  Thomas Flohr ,  Karl Stierstorfer

发明人： Herbert Bruder ,  Thomas Flohr ,  Karl Stierstorfer

IPC分类号： A61B6/03

CPC分类号： G06T11/005 ,  A61B6/027 ,  A61B6/032 ,  A61B6/4028 ,  A61B6/4085 ,  G01N23/046 ,  G01N2223/419

摘要： A method is for taking computed tomography scans with the aid of a CT unit and to a CT unit. An X-ray tube is moved in a circle or spiral about a z-axis in combination with a detector situated opposite and an object is scanned. The X-ray tube includes a jumping focus with two or more different jumping focal positions relative to the X-ray tube. Parallel data records are formed from the detector data obtained, and tomograms are reconstructed therefrom. When forming the parallel data records, account is taken of the different position of the respectively current jumping focus in relation to the X-ray tube (=jumping focal position) in the radial direction.

摘要翻译： 一种方法是借助于CT单元和CT单元进行计算机断层扫描。 X射线管与围绕z轴的圆形或螺旋形组合移动，与检测器相结合并且物体被扫描。 X射线管包括相对于X射线管具有两个或多个不同跳跃焦点位置的跳跃焦点。 从获得的检测器数据形成并行数据记录，并从其重构断层图像。 在形成并行数据记录时，考虑到相对于X射线管（=跳跃焦点位置）在径向上的分别当前跳跃焦点的不同位置。