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1. 发明授权

US07403587B2 Computer tomography method using a cone-shaped bundle of rays 失效
标题翻译：计算机断层扫描法使用锥形束光束
公开(公告)号：US07403587B2
公开(公告)日：2008-07-22
申请号：US10570088
申请日：2004-08-23
申请人： Claas Bontus , Thomas Köhler , Michael Grass
发明人： Claas Bontus , Thomas Köhler , Michael Grass
IPC分类号： A61B6/03
CPC分类号： A61B6/5217 , A61B6/027 , A61B6/032 , A61B6/4028 , A61B6/5264 , A61B6/527 , A61B6/541 , G06T11/005 , G06T11/006 , G06T2211/412
摘要： The invention relates to a computer tomography method in which an examination area is passed through by a cone-shaped bundle of rays. The bundle of rays comes from a radiation source location which moves around the examination area on an overall trajectory. The overall trajectory consists of a first, closed partial trajectory, at least one second, closed partial trajectory and at least one third partial trajectory which connects the first and the at least one second partial trajectories to one another. Measured values which depend on the intensity in the bundle of rays on the other side of the examination area are acquired by means of a detector unit while the radiation source location is moving on the overall trajectory, and a CT image of the examination area is reconstructed from these measured values.
摘要翻译：本发明涉及一种计算机断层摄影方法，其中检查区域通过锥形束的光束通过。一束光线来自在总体轨迹上围绕检查区域移动的辐射源位置。整个轨迹由第一，闭合的部分轨迹，至少一个第二，闭合的部分轨迹和至少一个将第一和第二部分轨迹相互连接的第三部分轨迹组成。在辐射源位置在整个轨迹上移动的同时，通过检测器单元获取取决于检查区另一侧的光线束强度的测量值，并且重建检查区域的CT图像从这些测量值。

2. 发明申请

US20090238328A1 X-RAY TUBE WITH OSCILLATING ANODE 审中-公开
标题翻译：带振动阳极的X射线管
公开(公告)号：US20090238328A1
公开(公告)日：2009-09-24
申请号：US12299477
申请日：2007-04-25
申请人： Peter Forthmann , Claas Bontus , Thomas Köhler
发明人： Peter Forthmann , Claas Bontus , Thomas Köhler
IPC分类号： A61B6/00 , H01J35/00 , H01J35/30
CPC分类号： A61B6/032 , A61B6/4021 , H01J35/101 , H01J35/26 , H01J35/28 , H01J2235/10
摘要： It is described an X-ray tube (205), in particular for use in computed tomography, comprising an electron source (250), for generating an electron beam (255), an electron deflection device (256) for deflecting the generated electron beam (255), a control unit (257) being coupled to the electron deflection device (256) for spatially controlling the deflection, and an anode (206), which is arranged such that the electron beam (255) impinges onto a focal spot of a surface of the anode (206). Thereby the anode (206) is movable along a z-axis in an oscillating manner, the surface of the anode (206) is oriented oblique with respect to the z-axis, and the control unit (257) is adapted to spatially control the focal spot (255 a) in such a manner that the focal spot moves essentially in a discrete manner between a first focal spot position (106a, 406a) having a first z-coordinate and a second focal spot position (106b, 406b) having a second z-coordinate being different from the first z-coordinate.
摘要翻译：描述了一种特别用于计算机断层摄影的X射线管（205），包括用于产生电子束（255）的电子源（250），用于偏转生成的电子束的电子偏转装置（256）（255），耦合到电子偏转装置（256）的空间控制偏转的控制单元（257）和阳极（206），其布置成使得电子束（255）撞击到阳极的表面（206）。因此，阳极（206）可以以振荡方式沿Z轴移动，阳极（206）的表面相对于z轴倾斜定向，并且控制单元（257）适于空间控制焦点（255a），使得焦点基本上以离散的方式移动在具有第一z坐标的第一焦点位置（106a，406a）和具有第一焦点位置（106b，406b）之间的焦点第二z坐标与第一z坐标不同。

3. 发明授权

US07548603B2 Method and apparatus for exact cone beam computed tomography 失效
标题翻译：精确锥束计算机断层扫描的方法和装置
公开(公告)号：US07548603B2
公开(公告)日：2009-06-16
申请号：US10534158
申请日：2003-11-03
申请人： Claas Bontus , Thomas Köhler
发明人： Claas Bontus , Thomas Köhler
IPC分类号： A61B6/03
CPC分类号： G06T11/006 , A61B6/027 , G06T2211/416 , G06T2211/421 , Y10S378/901
摘要： The invention relates to a computed tomography method in which an examination zone is irradiated along a helical trajectory by a conical radiation beam. The radiation transmitted by the examination zone is measured by means of a detector unit and therefrom the absorption distribution in the examination zone is reconstructed without approximations. The reconstruction comprises a derivation of the measuring values of parallel rays of different projections, an integration of these values along K lines, a weighting of these values and a back projection.
摘要翻译：本发明涉及一种计算机断层摄影方法，其中通过锥形辐射束沿着螺旋轨迹照射检查区。通过检测器单元测量由检查区传输的辐射，并且由此重建检查区中的吸收分布而不进行近似。重构包括不同投影的平行光线的测量值的推导，这些值沿K线的积分，这些值的加权和反投影。

4. 发明授权

US07426257B2 Computer tomography method for a periodically moving object 有权
标题翻译：用于周期性移动物体的计算机断层摄影方法
公开(公告)号：US07426257B2
公开(公告)日：2008-09-16
申请号：US10552399
申请日：2004-04-02
申请人： Thomas Köhler , Michael Grass , Roland Proksa
发明人： Thomas Köhler , Michael Grass , Roland Proksa
IPC分类号： A61B6/03
CPC分类号： A61B6/541 , A61B5/1135 , A61B6/027 , A61B6/032 , A61B6/4085 , A61B6/503 , A61B6/504
摘要： The invention relates to a computer tomography method in which a periodically moving object, in particular an organ of the body, is irradiated by a cone-shaped beam cluster (4) along a trajectory which runs on a cylindrical surface. The radiation transmitted through the object is measured by means of a detector unit (16), and at the same time the periodic movement of the object is recorded. In order to reconstruct the absorption distribution of the object, the measured values or the corresponding beams are rebinned to form a number of parallel projections, where for each of these projections a measured value is determined whose beam irradiates the object. The point in time at which this measured value was acquired is allocated to the respective projection. For the reconstruction, which may for example be carried out using a filtered back-projection, only projections whose allocated points in time lie within a predefined, specific time range (H1) within a period of the object movement are used.
摘要翻译：本发明涉及一种计算机断层摄影方法，其中周期性移动的物体，特别是身体的脏器被沿着在圆柱形表面上运行的轨迹由锥形束簇（4）照射。通过检测器单元（16）测量透过物体的辐射，同时记录物体的周期性运动。为了重建物体的吸收分布，将测量值或对应的光束重新组合以形成多个平行投影，其中对于这些投影中的每一个，确定其光束照射物体的测量值。将获取该测量值的时间点分配给相应的投影。对于可以例如使用滤波反投影来进行的重建，仅使用其分配的时间点在物体移动的时段内在预定义的特定时间范围（H 1）内的投影。

5. 发明授权

US06381298B2 Method of combining reconstruction images 失效
标题翻译：组合重建图像的方法
公开(公告)号：US06381298B2
公开(公告)日：2002-04-30
申请号：US09732587
申请日：2000-12-08
申请人： Roland Proksa , Michael Grass , Thomas Köhler
发明人： Roland Proksa , Michael Grass , Thomas Köhler
IPC分类号： A61B600
CPC分类号： H05G1/30 , A61B6/027 , A61B6/032 , A61B6/4085 , A61B6/4441 , A61B6/4464 , A61B6/583 , A61B6/585 , G01N23/04 , G06T11/006
摘要： Method and device for forming a 3D image of an object to be examined by combining at least two reconstruction images, acquired by an X-ray device, by weighted addition. Specifically, each reconstruction image is weighted with a respective weighting function which describes at least approximately the distribution of noise and/or the distribution of artifacts in the reconstruction image. The image quality of the resultant three-dimensional image is thus significantly improved.
摘要翻译：用于通过组合由X射线装置获取的至少两个重建图像，通过加权相加来形成待检查对象的3D图像的方法和装置。具体地，每个重建图像用相应的加权函数加权，该加权函数至少近似描述了重建图像中噪声的分布和/或伪影的分布。因此，所得到的三维图像的图像质量显着提高。

6. 发明授权

US07340028B2 Method and device for volumetric image reconstruction 失效
标题翻译：用于体积图像重建的方法和装置
公开(公告)号：US07340028B2
公开(公告)日：2008-03-04
申请号：US10546064
申请日：2004-02-10
申请人： Michael Grass , Robert Manzke , Thomas Köhler
发明人： Michael Grass , Robert Manzke , Thomas Köhler
IPC分类号： A61B6/03
CPC分类号： A61B6/541 , A61B6/027 , A61B6/032 , A61B6/503 , G06T11/005 , G06T2211/412 , Y10S378/901
摘要： The reconstruction of computer tomography data is very often based on a parallel rebinning step of the projection data prior to the filtered back projection. In case of cardiac reconstruction, a gating technique is applied to select appropriate projections for a time-dependent image reconstruction. Usually, the gating window is a function of the fan-beam/cone-beam projection only. According to the present invention, a function corresponding to the location on the detector surface, where the respective projection was detected is used to further verify whether the respective projection is truly within the selected gating window or not.
摘要翻译：计算机断层扫描数据的重建通常基于在滤波反投影之前的投影数据的并行重组步骤。在心脏重建的情况下，门控技术被应用于选择用于时间依赖图像重建的适当的投影。通常，门控窗口仅是扇形束/锥形束投影的功能。根据本发明，使用与检测器表面上检测到的各个投影的位置相对应的功能来进一步验证相应投影是否真正位于所选择的门控窗口内。

7. 发明授权

US07340026B2 Reconstruction of the current flow in a vessel system 失效
标题翻译：船舶系统中当前流量的重建
公开(公告)号：US07340026B2
公开(公告)日：2008-03-04
申请号：US10563844
申请日：2004-06-29
申请人： Thomas Köhler , Michael Grass
发明人： Thomas Köhler , Michael Grass
IPC分类号： A61B6/00
CPC分类号： G06T7/0012 , A61B5/05 , A61B6/481 , A61B6/504 , G06F19/00 , G06T2207/30101 , G16H50/50 , Y10S378/901
摘要： The invention relates to a method of reconstructing the current flow, or the bolus arrival times, in a vessel system. For the sections (i) of the vessel tree, bolus arrival times (mi) are measured, for example in connection with an injection of contrast medium. Based on this measured data, linear programming is then used to calculate model bolus arrival times (ti), which, on the one hand, through minimization of the function E=Σ|mi−ti|, are as close as possible to the measured data, and, on the other, by adherence to the boundary condition Δi=ti−tp(i)≧0, ensure the monotony of the propagation, wherein p(i) is the index of the vessel section in front of vessel section (i). Preferably, as smooth as possible a progression is compelled by means of an additional minimization of Em=Σ|ti″|.
摘要翻译：本发明涉及一种重建血管系统中的电流或推车到达时间的方法。对于血管树的部分（i），例如结合注射造影剂来测量推注到达时间（mI i i）。基于该测量数据，然后使用线性规划来计算模型推注到达时间（t i i i i），一方面通过函数E = Sigma | m i i的最小化尽可能接近测量的数据，另一方面，通过遵守边界条件，ΔIi i = t i＆lt; i＆lt; p（i） = 0，确保传播的单调性，其中p（i）是容器部分前面的容器部分的指数（i ）。优选地，尽可能平滑地通过附加的最小化来强制进展。

8. 发明申请

US20090238326A1 ELECTRON COMPUTER TOMOGRAPHY METHOD AND ELECTRON COMPUTER TOMOGRAPH 失效
标题翻译：电子计算机计算机方法和电子计算机图形
公开(公告)号：US20090238326A1
公开(公告)日：2009-09-24
申请号：US11721165
申请日：2005-12-08
申请人： Michael Grass , Thomas Köhler
发明人： Michael Grass , Thomas Köhler
IPC分类号： A61B6/00
CPC分类号： G01N23/046 , A61B6/027 , A61B6/032 , A61B6/4028 , A61B6/4488 , G01N2223/419
摘要： There is provided an electron computer tomography method for recording a moving object (27), in which an electron beam is deflected onto an anode arc (14) in order to generate X-ray radiation which passes through an object (27) and is picked up by a detector device (28), wherein the X-ray radiation leaves the anode arc (14) in the form of a fan-shaped beam having a source trajectory (40) in the form of a circle segment around the object (27) and the starting point (41) of the source trajectory (40) can be changed. Also provided is an electron computer tomograph for recording a moving object (27), comprising an electron gun (8), a focusing coil (12), a curvature coil (16), an anode arc (14) for generating an X-ray beam by being struck by an electron beam of the electron gun (8), and a detector device (28) for detecting the X-ray radiation transmitted through a volume (26), said X-ray radiation having a source trajectory (40) in the form of a circle segment at the anode arc (14) and a variable starting point (41) of the source trajectory (40).
摘要翻译：提供了一种用于记录运动物体（27）的电子计算机断层摄影方法，其中电子束偏转到阳极弧（14）上，以便产生穿过物体（27）并被拾取的X射线辐射（28），其中X射线辐射以具有围绕物体（27）的圆弧形式的源轨迹（40）的扇形梁的形式离开阳极弧（14））和源轨迹（40）的起点（41）可以改变。还提供了一种用于记录运动物体（27）的电子计算机断层摄影机，包括电子枪（8），聚焦线圈（12），曲率线圈（16），用于产生X射线的阳极弧通过被电子枪（8）的电子束撞击的光束;以及用于检测透过体积（26）的X射线辐射的检测器装置（28），所述X射线辐射具有源轨迹（40）在阳极弧（14）处的圆形段和源轨迹（40）的可变起点（41）的形式。

9. 发明申请

US20090185655A1 COMPUTED TOMOGRAPHY METHOD 审中-公开
标题翻译：计算机测图法
公开(公告)号：US20090185655A1
公开(公告)日：2009-07-23
申请号：US11575662
申请日：2005-09-23
申请人： Peter Koken , Andy Ziegler , Michael Grass , Thomas Köhler , Roland Proksa
发明人： Peter Koken , Andy Ziegler , Michael Grass , Thomas Köhler , Roland Proksa
IPC分类号： A61B6/00 , G21K1/00
CPC分类号： A61B6/032 , A61B6/027 , A61B6/4028 , A61B6/4085 , A61B6/4291
摘要： A computed tomography method and apparatus are provided wherein a radiation source moves circularly relative to an examination zone about an axis of rotation (14). The radiation source produces a cone beam of x-rays and the focal point of this cone beam is switched between at least two positions (23a, 23b) spaced apart from each other and arranged on a line parallel to the axis of rotation to enlarge the reconstructable examination zone parallel to the axis of rotation. Preferably, the image of the examination zone is reconstructed using an iterative reconstruction method, in particular an algebraic reconstruction method or a maximum likelihood method.
摘要翻译：提供了一种计算机断层摄影方法和装置，其中辐射源围绕旋转轴线（14）相对于检查区域循环移动。辐射源产生X射线的锥形束，并且该锥形束的焦点在至少两个彼此间隔开的位置（23a，23b）之间切换并且布置在与旋转轴线平行的线上，以扩大可重建检查区域平行于旋转轴。优选地，使用迭代重建方法，特别是代数重建方法或最大似然方法来重建检查区域的图像。

10. 发明授权

US07545903B2 Reconstruction of an image of a moving object from volumetric data 有权
标题翻译：从体积数据重建移动物体的图像
公开(公告)号：US07545903B2
公开(公告)日：2009-06-09
申请号：US10564572
申请日：2004-07-07
申请人： Thomas Köhler , Michael Grass , Michael Harald Kuhn , Roland Proksa
发明人： Thomas Köhler , Michael Grass , Michael Harald Kuhn , Roland Proksa
IPC分类号： A61B6/03
CPC分类号： G06T7/20 , G06T11/005 , G06T2207/10081 , G06T2207/30048 , G06T2211/404 , G06T2211/412
摘要： In the CT imaging of non-homogeneously moving objects such as the heart or the coronary vessel tree, there is a problem that different parts of the objects are at rest at different points in time. Thus, a gated reconstruction with a globally selected time point does not yield a sharp image of such objects. According to the present invention, a motion of the objects is estimated, describing the motion of selected regions of these objects. Then, on the basis of the estimated motion, time points are determined, where these areas have minimal motion. Then, an image is reconstructed, wherein the data from which the respective regions are reconstructed, correspond to the respective time points, where the regions have minimal motion. Due to this, an improved image qualify maybe provided.
摘要翻译：在诸如心脏或冠状血管树之类的非均匀运动物体的CT成像中，存在不同部分的物体在不同时间点处于静止状态的问题。因此，具有全局选择的时间点的门控重构不会产生这样的对象的清晰图像。根据本发明，估计对象的运动，描述这些对象的选定区域的运动。然后，在估计运动的基础上，确定这些区域具有最小运动的时间点。然后，重建图像，其中各个区域被重构的数据对应于各个时间点，其中区域具有最小的运动。因此，可以提供改进的图像资格。

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