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1. 发明申请

US20100296624A1 HIGH-FREQUENCY SADDLE-TRAJECTORY FOR AXIAL CARDIAC CT 审中-公开
标题翻译：用于轴向心脏CT的高频脊索
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。

2. 发明申请

US20090268863A1 RECONSTRUCTION METHOD FOR HELICAL CONE-BEAM CT 失效
标题翻译：螺旋CT梁的重建方法
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。

3. 发明授权

US07778387B2 Reconstruction method for helical cone-beam CT 失效
标题翻译：螺旋锥束CT重建方法
公开(公告)号：US07778387B2
公开(公告)日：2010-08-17
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： A61B6/00
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，从测量值产生两组滤波投影（＆Sgr;＆nlE; m，＆Sgr？m），并分别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））。在方法的近似版本中，首先添加过滤投影的集合（＆Sgr;＆nlE; m，＆Sgr;> m），然后反投影。

4. 发明授权

US09466135B2 Reconstruction of a region-of-interest image 有权
标题翻译：重建一个感兴趣区域的形象
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。

5. 发明授权

US07889901B2 Computed tomography method with helical relative movement and conical beam bundle 失效
标题翻译：计算机断层扫描方法与螺旋相对运动和锥形束束
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。

6. 发明申请

US20090262885A1 CONE BEAM COMPUTED TOMOGRAPHY WITH MULTIPLE PARTIAL SCANNING TRAJECTORIES 失效
标题翻译：具有多个部分扫描轨迹的锥体光束计算机图
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）。

7. 发明授权

US08396274B2 Imaging system 有权
标题翻译：成像系统
公开(公告)号：US08396274B2
公开(公告)日：2013-03-12
申请号：US12438559
申请日：2007-08-28
申请人： Claas Bontus , Michael Grass , Thomas Koehler
发明人： Claas Bontus , Michael Grass , Thomas Koehler
IPC分类号： G06K9/00
CPC分类号： A61B6/032 , A61B6/027
摘要： The present invention relates to an imaging system for imaging a field of interest, in particular to a computed tomography system. The imaging system comprises an irradiation unit (2) which moves relative to a field of interest along a first trajectory (501) and along a second trajectory (503). While the irradiation unit (2) moves along the first trajectory (501), first detection data are acquired and, while the irradiation unit (2) moves along the second trajectory (503), second detection data are acquired. An intermediate image of the field of interest is reconstructed from at least the second detection data, and virtual detection data are determined by forward projection through the intermediate image. Finally, an image of the field of interest is reconstructed from the first detection data and the virtual detection data.
摘要翻译：本发明涉及用于对感兴趣的领域，特别是计算机断层摄影系统进行成像的成像系统。成像系统包括沿着第一轨迹（501）并沿第二轨迹（503）相对于感兴趣的场移动的照射单元（2）。当照射单元（2）沿着第一轨迹（501）移动时，获取第一检测数据，并且当照射单元（2）沿着第二轨迹（503）移动时，获取第二检测数据。至少从第二检测数据重建感兴趣区域的中间图像，并且通过中间图像的向前投影确定虚拟检测数据。最后，从第一检测数据和虚拟检测数据重建感兴趣区域的图像。

8. 发明申请

US20120141006A1 RECONSTRUCTION OF A REGION-OF-INTEREST IMAGE 有权
标题翻译：重建区域图像
公开(公告)号：US20120141006A1
公开(公告)日：2012-06-07
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
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。

9. 发明授权

US07187747B2 Computerized tomography method with helical relative movement and conical beam 失效
标题翻译：具有螺旋相对运动和锥形束的计算机断层扫描方法
公开(公告)号：US07187747B2
公开(公告)日：2007-03-06
申请号：US10546231
申请日：2004-02-11
申请人： Claas Bontus , Thomas Koehler
发明人： Claas Bontus , Thomas Koehler
IPC分类号： H05G1/60
CPC分类号： G06T11/006 , A61B6/027 , G06T2211/416 , G06T2211/421
摘要： The invention relates to a computerized tomography method, in which an examination area is scanned radiographically along a helical trajectory by a conical beam. The radiation transmitted through the examination area is measured by means of a detector unit, wherein the absorption distribution in the examination area is reconstructed exactly or at least quasi-exactly from these measured values. Reconstruction uses redundant measured values and comprises derivation of the measured values from parallel rays of different projections, integration of these values along κ-lines, weighting of these values and back-projection.
摘要翻译：本发明涉及一种计算机断层摄影方法，其中通过锥形光束沿着螺旋轨迹对X射线照相检查区域进行扫描。透过检查区域的辐射通过检测器单元测量，其中检查区域中的吸收分布被准确地或至少准确地从这些测量值重建。重建使用冗余测量值，包括从不同投影的平行光线导出测量值，这些值沿着kappa线的积分，这些值的加权和反投影。

10. 发明授权

US07822171B2 Cone beam computed tomography with multiple partial scanning trajectories 失效
标题翻译：具有多个部分扫描轨迹的锥束计算机断层扫描
公开(公告)号：US07822171B2
公开(公告)日：2010-10-26
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）。

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