公开(公告)号：US20100296624A1

公开(公告)日：2010-11-25

申请号：US12445765

申请日：2007-10-16

申请人： Claas Bontus ,  Roland Proksa ,  Thomas Koehler

发明人： Claas Bontus ,  Roland Proksa ,  Thomas Koehler

IPC分类号： A61B6/03

CPC分类号： A61B6/503 ,  A61B6/027 ,  A61B6/032 ,  A61B6/4021 ,  A61B6/4085 ,  A61B6/541

摘要： If, in cardiac CT, the time window becomes shorter than the time required for a complete rotation of the gantry, the volume that can be reconstructed becomes small due to the non-existence of related pi-lines. According to an exemplary embodiment of the present invention, an examination apparatus is provided which generates a radiation beam oscillating in z-direction with an oscillation frequency higher than the rotational frequency of the source. This may provide for an exact image reconstruction of large volumes.

摘要翻译： 如果在心脏CT中，时间窗口变得比台架完全旋转所需的时间短，则由于不存在相关的pi线，可重构的体积变小。 根据本发明的示例性实施例，提供了一种检查装置，其产生以比源的旋转频率高的振荡频率在z方向上振荡的辐射束。 这可以提供大体积的精确图像重建。

公开(公告)号：US07627081B2

公开(公告)日：2009-12-01

申请号：US11817031

申请日：2006-02-20

申请人： Claas Bontus

发明人： Claas Bontus

IPC分类号： H05G1/00 ,  H05G1/02

CPC分类号： A61B6/032 ,  A61B6/027 ,  A61B6/4007 ,  A61B6/4014 ,  A61B6/4488 ,  G01N23/046 ,  G01N2223/419

摘要： A computer tomography apparatus (100) for examination of an object of interest (107), the computer tomography apparatus (100) comprising a first electromagnetic radiation source (104) adapted to emit electromagnetic radiation to an object of interest (107), a second electromagnetic radiation source (203) adapted to emit electromagnetic radiation to the object of interest (107), at least one detecting device (108) adapted to detect electromagnetic radiation generated by the first electromagnetic radiation source (104) and by the second electromagnetic radiation source (203) and scattered on the object of interest (107), and a determination unit (118) adapted to determine structural information concerning the object of interest (107) based on an analysis of detecting signals received from the at least one detecting device (108).

摘要翻译： 一种用于检查感兴趣对象（107）的计算机断层摄影装置（100），所述计算机断层摄影装置（100）包括适于向感兴趣对象（107）发射电磁辐射的第一电磁辐射源（104），第二 适于向感兴趣物体（107）发射电磁辐射的电磁辐射源（203），适于检测由第一电磁辐射源（104）产生的电磁辐射的第一电磁辐射源 （203）并分散在感兴趣对象（107）上，以及确定单元（118），用于基于从至少一个检测设备接收的检测信号的分析来确定关于感兴趣对象（107）的结构信息（107） 108）。

公开(公告)号：US20090268863A1

公开(公告)日：2009-10-29

申请号：US11913821

申请日：2006-05-03

申请人： Thomas Koehler ,  Claas Bontus ,  Peter Koken

发明人： Thomas Koehler ,  Claas Bontus ,  Peter Koken

IPC分类号： H05G1/60 ,  G06K9/00

CPC分类号： G06T11/006 ,  A61B6/027 ,  G06T2211/421

摘要： The invention relates to a method and a system for the reconstruction of an object function (f(x)) based on projections acquired during the motion of a radiation source on a helical trajectory (17). The method is particularly suited for an n-PI+ acquisition which by definition completely comprises an n-PI and additionally some overscan data from the (n+2)−PI window. According to the method, two sets (Σ≧m, Σ≧m) of filtered projections are generated from the measuring values and separately back-projected to yield two absorption functions. The first absorption function (flf(x)) is based on contributions of Radon-planes with at most m intersections with the source trajectory (17), while the second absorption function (fhf(x)) is based on Radon-planes with more than m intersections with the source trajectory (17). The two absorption functions are added to yield the final absorption function (f(x)) of an object in the examination zone. In an approximative version of the method, the sets (Σ≧m, Σ≧m) of filtered projections are first added and then back-projected.

摘要翻译： 本发明涉及一种用于基于在螺旋轨迹（17）上的辐射源的运动期间获取的投影来重建对象函数（f（x））的方法和系统。 该方法特别适用于n-PI +采集，其通过定义完全包括n-PI，并且另外还包括来自（n + 2）-PI窗口的一些过扫描数据。 根据该方法，从测量值产生经滤波的投影的两组（Sigma> = m，Sigma> = m），并单独反投影以产生两个吸收函数。 第一吸收函数（flf（x））基于与源轨迹（17）最多m个交点的氡面的贡献，而第二吸收函数（fhf（x））基于具有更多的氡面 而不是与源轨迹（17）的交点。 添加两个吸收函数以产生检查区中物体的最终吸收函数（f（x））。 在该方法的近似版本中，首先添加滤波投影的集合（Sigma> = m，Sigma> = m），然后反投影。

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。

公开(公告)号：US09466135B2

公开(公告)日：2016-10-11

申请号：US13388068

申请日：2010-07-09

申请人： Thomas Koehler ,  Claas Bontus

发明人： Thomas Koehler ,  Claas Bontus

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

CPC分类号： G06T11/006 ,  A61B6/5258 ,  G06T2211/424 ,  G06T2211/432

摘要： A method and system to perform region-of-interest (ROI) reconstruction is provided, even if the original projection data are truncated. The reconstruction is performed on a superset of the ROI, including the ROI as well as other areas which are outside the scan field-of-view of the imaging system but still within the imaging bore.

摘要翻译： 即使原始投影数据被截断，也提供了执行感兴趣区域（ROI）重构的方法和系统。 重建在ROI的超集上执行，包括ROI以及在成像系统的扫描视场外但仍在成像孔内的其它区域。

公开(公告)号：US09439579B2

公开(公告)日：2016-09-13

申请号：US13989431

申请日：2011-12-05

申请人： Claas Bontus ,  Bernhard Gleich

发明人： Claas Bontus ,  Bernhard Gleich

IPC分类号： A61B5/05

CPC分类号： A61B5/0515

摘要： Method for influencing and/or detecting magnetic particles in a field of view. Selection coils/magnets generate a magnetic selection field and drive coils generate a magnetic drive field for moving a field-free point along a predetermined trajectory through the field of view, changing the magnetization of the magnetic material locally. The drive field comprises a time-dependent oscillating drive field current per drive field coil having one or more individual oscillating frequencies and one or more individual current amplitudes and being generated by a corresponding drive field voltage generated by a superposition of a number of drive field voltage components including a drive field voltage component per drive field coil, wherein a drive field voltage component corresponding to a drive field coil comprises one or more sub-components, each having an individual voltage amplitude and having the same individual oscillating frequency as the respective drive field current of said particular drive field coil.

摘要翻译： 在视野中影响和/或检测磁性颗粒的方法。 选择线圈/磁体产生磁选区，驱动线圈产生用于沿着预定轨迹移动无场点的磁驱动场，从而局部改变磁性材料的磁化。 驱动场包括具有一个或多个单独振荡频率和一个或多个单独电流幅度的每个驱动场线圈的时间依赖的振荡驱动场电流，并且由通过多个驱动场电压的叠加产生的对应的驱动场电压产生 包括每个驱动场线圈的驱动场电压分量的组件，其中对应于驱动场线圈的驱动场电压分量包括一个或多个子分量，每个子分量具有单独的电压幅度并且具有与相应驱动场相同的单个振荡频率 所述特定驱动场线圈的电流。

公开(公告)号：US08401144B2

公开(公告)日：2013-03-19

申请号：US12535231

申请日：2009-08-04

申请人： Peter Forthmann ,  Axel Thran ,  Claas Bontus ,  Roland Proksa

发明人： Peter Forthmann ,  Axel Thran ,  Claas Bontus ,  Roland Proksa

IPC分类号： G01N23/083 ,  H05G1/60

CPC分类号： A61B6/032 ,  A61B6/027 ,  A61B6/488 ,  G06T5/50 ,  G06T11/005 ,  G06T2207/10072 ,  G06T2211/432

摘要： A scanning method and apparatus useful for correcting artifacts which may appear in a primary short circular CT scan are provided. A secondary helical scan performed on a stationary subject, or a secondary circular scan, may be used to correct for artifacts. The secondary scan may be performed with a smaller radiation dosage than the primary circular CT scan.

摘要翻译： 提供了可用于校正可能出现在初级短圆形CT扫描中的伪影的扫描方法和装置。 可以使用在静止对象上进行的辅助螺旋扫描或二次循环扫描来校正伪像。 次扫描可以以比初级圆形CT扫描更小的辐射剂量进行。

公开(公告)号：US07889901B2

公开(公告)日：2011-02-15

申请号：US11815606

申请日：2006-01-31

申请人： Claas Bontus ,  Michael Grass ,  Thomas Koehler

发明人： Claas Bontus ,  Michael Grass ,  Thomas Koehler

IPC分类号： G06K9/00 ,  A61B6/00

CPC分类号： G06T11/006 ,  A61B6/027 ,  G06T2211/421

摘要： The invention relates to a computed tomography method in which a periodically moving object is irradiated by a conical beam bundle. An nPi-relative movement is generated between a radiation source, which generates the conical beam bundle, and the object. During the nPi-relative movement, measured values are acquired, which depend on the intensity in the beam bundle on the other side of the object and from these measured values filter values are determined, which are divided into different groups. The filter values of at least one group are weighted in dependence on the movement of the object, wherein, when filter values of several groups are weighted, filter values of different groups are weighted differently in dependence on the movement of the object. Finally, a CT image of the object is reconstructed from the filter values.

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被锥形束束照射。 在产生锥形束束的辐射源和物体之间产生nPi相对运动。 在nPi相对运动期间，获取测量值，其取决于物体另一侧上的束束中的强度，并且从这些测量值确定滤波器值，其被划分为不同的组。 根据对象的移动对至少一个组的滤波器值进行加权，其中当对多个组的滤波器值进行加权时，根据对象的移动对不同组的滤波器值进行加权不同。 最后，从过滤器值重建对象的CT图像。

公开(公告)号：US20090262885A1

公开(公告)日：2009-10-22

申请号：US12296945

申请日：2006-04-19

申请人： Claas Bontus ,  Thomas Koehler ,  Peter Koken ,  Andy Ziegler

发明人： Claas Bontus ,  Thomas Koehler ,  Peter Koken ,  Andy Ziegler

IPC分类号： A61B6/00

CPC分类号： G06T11/006 ,  A61B6/027 ,  G06T11/005

摘要： A computer tomography apparatus (100) for examination of an object of interest (107) comprising an electromagnetic radiation source (104) adapted to emit electromagnetic radiation to an object of interest (107), a detecting device (108) adapted to detect electromagnetic radiation generated by the electromagnetic radiation source (104) and passed through the object of interest (107), and a motion generation device (101, 119) adapted to move the electromagnetic radiation source (104) and the detecting device (108) with respect to the object of interest (107) along a first trajectory and along a second trajectory which differs from the first trajectory, wherein the second trajectory is selected in such a manner that electromagnetic radiation detected during performing the second trajectory provides data which complete mathematically incomplete data detected during performing the first trajectory to thereby allow a reconstruction of structural information concerning the object of interest (107).

摘要翻译： 一种用于检查感兴趣对象（107）的计算机断层摄影装置（100），包括适于向感兴趣对象（107）发射电磁辐射的电磁辐射源（104），适于检测电磁辐射的检测装置 由电磁辐射源（104）产生并通过感兴趣物体（107）的运动产生装置（101,119），适于相对于电磁辐射源（104）和检测装置（108）移动 感兴趣的物体（107）沿着第一轨迹并且沿着与第一轨迹不同的第二轨迹，其中以这样的方式选择第二轨迹，使得在执行第二轨迹期间检测到的电磁辐射提供了完全数学上不完整的数据检测的数据 在执行第一轨迹期间，从而允许重建关于感兴趣对象的结构信息 （107）。

公开(公告)号：US07570730B2

公开(公告)日：2009-08-04

申请号：US10598866

申请日：2005-03-07

申请人： Thomas Kohler ,  Claas Bontus

发明人： Thomas Kohler ,  Claas Bontus

IPC分类号： A61B6/03

CPC分类号： G06T11/005 ,  G01T1/1647 ,  Y10S378/901

摘要： Image quality is an important feature for CT scanning, in particular for helical cone-beam CT scanning. By using projection data acquired at two different positions of the focal spot of the radiation beam and rebinning that projection data from a first geometry to a second geometry the two sub-sets of projection data are combined to one rebinned projection data set, thereby improving the radial resolution of the data set. Advantageously, according to an aspect of the present invention, a further rebinning may be performed, from the second geometry back to the first geometry, therefore resulting in a projection data set in the initial geometry with a higher radial resolution.

摘要翻译： 图像质量是CT扫描的重要特征，特别是螺旋锥束CT扫描。 通过使用在辐射束的焦斑的两个不同位置处获取的投影数据，并将投影数据从第一几何重新组合到第二几何，将两个投影数据子集组合成一个重新投影的投影数据集，从而改善 数据集的径向分辨率。 有利地，根据本发明的一个方面，可以从第二几何体到第一几何形状进行进一步的重新组合，因此导致在初始几何形状中以更高的径向分辨率设置的投影数据。