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。

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：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）。

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：US08131040B2

公开(公告)日：2012-03-06

申请号：US12377915

申请日：2007-07-24

申请人： Thomas Koehler ,  Peter Koken

发明人： Thomas Koehler ,  Peter Koken

IPC分类号： G06K9/00

CPC分类号： A61B6/466 ,  A61B6/032 ,  A61B6/037 ,  A61B6/5235 ,  A61B6/541

摘要： A diagnostic imaging system (8) images a subject at a preselected phase point (46) which occurs in one or more successive pulmonary cycles. A breathing monitor (44) monitors a cyclic physiological parameter in the pulmonary cycle and generates a cyclic pulmonary phase indicative signal. A CT scanner (12) is disposed adjacent an examination region (28) to generate transmission radiation data. A data processor (60) reconstructs an attenuation map (96) from the transmission data by weighting the transmission radiation data such that each of the pulmonary phases contributes substantially equally to the attenuation map.

摘要翻译： 诊断成像系统（8）在一个或多个连续肺循环中发生的预选相位点（46）对受试者进行成像。 呼吸监测器（44）监测肺循环中的循环生理参数并产生循环肺动脉指示信号。 CT扫描器（12）邻近检查区域（28）设置以产生透射辐射数据。 数据处理器（60）通过对发射辐射数据进行加权来重建来自发射数据的衰减图（96），使得每个肺相位基本上等于衰减图。

公开(公告)号：US20100239134A1

公开(公告)日：2010-09-23

申请号：US12377915

申请日：2007-07-24

申请人： Thomas Koehler ,  Peter Koken

发明人： Thomas Koehler ,  Peter Koken

IPC分类号： G06K9/00

CPC分类号： A61B6/466 ,  A61B6/032 ,  A61B6/037 ,  A61B6/5235 ,  A61B6/541

摘要： A diagnostic imaging system (8) images a subject at a preselected phase point (46) which occurs in one or more successive pulmonary cycles. A breathing monitor (44) monitors a cyclic physiological parameter in the pulmonary cycle and generates a cyclic pulmonary phase indicative signal. A CT scanner (12) is disposed adjacent an examination region (28) to generate transmission radiation data. A data processor (60) reconstructs an attenuation map (96) from the transmission data by weighting the transmission radiation data such that each of the pulmonary phases contributes substantially equally to the attenuation map.

摘要翻译： 诊断成像系统（8）在一个或多个连续肺循环中发生的预选相位点（46）对受试者进行成像。 呼吸监测器（44）监测肺循环中的循环生理参数并产生循环肺动脉指示信号。 CT扫描器（12）邻近检查区域（28）设置以产生透射辐射数据。 数据处理器（60）通过对发射辐射数据进行加权来重建来自发射数据的衰减图（96），使得每个肺相位基本上等于衰减图。

公开(公告)号：US20110112392A1

公开(公告)日：2011-05-12

申请号：US13000386

申请日：2009-06-18

申请人： Peter Boernert ,  Jochen Keupp ,  Peter Koken ,  Kay Nehrke

发明人： Peter Boernert ,  Jochen Keupp ,  Peter Koken ,  Kay Nehrke

IPC分类号： A61B5/055

CPC分类号： G01R33/56375 ,  G01R33/56383

摘要： Magnetic resonance examination system comprises displaceable carrier for supporting an object to be examined. The carrier can be moved over a two dimensional area. The magnetic resonance examination system is configured to acquire sets of magnetic resonance signals from the object for various positions of the carrier in the two dimensional area.

摘要翻译： 磁共振检查系统包括用于支撑被检查物体的可移位载体。 载体可以在二维区域上移动。 磁共振检查系统被配置为从二维区域中的载体的各个位置获取来自物体的磁共振信号。

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。

公开(公告)号：US20110156704A1

公开(公告)日：2011-06-30

申请号：US13063472

申请日：2009-09-10

申请人： Peter Boernert ,  Peter Koken ,  Kay Nehrke ,  Ulrich Katscher ,  Ingmar Graesslin

发明人： Peter Boernert ,  Peter Koken ,  Kay Nehrke ,  Ulrich Katscher ,  Ingmar Graesslin

IPC分类号： G01R33/34

CPC分类号： G01R33/583 ,  G01R33/246 ,  G01R33/3415 ,  G01R33/4838 ,  G01R33/5612 ,  G01R33/5659 ,  G01R33/586

摘要： The invention relates to a method of acquiring MRI image data comprising the following steps: performing a 3-dimensional B1 mapping of a first volume using a first voxel size, selecting an MRI protocol, performing the B1-shim in accordance with the MRI protocol, performing the MRI protocol to acquire MRI imaging data of a second volume using a second voxel size, wherein the first voxel size is larger than the second voxel size, wherein the first volume is larger than the second volume, and wherein the second volume is contained within the first volume.

摘要翻译： 本发明涉及一种获取MRI图像数据的方法，包括以下步骤：使用第一体素大小执行第一体积的3维B1映射，选择MRI协议，根据MRI协议执行B1-垫片， 执行MRI协议以使用第二体素尺寸获取第二体积的MRI成像数据，其中所述第一体素大小大于所述第二体素大小，其中所述第一体积大于所述第二体积，并且其中所述第二体积被包含 在第一卷内。

公开(公告)号：US20070183639A1

公开(公告)日：2007-08-09

申请号：US10598421

申请日：2005-02-23

申请人： Thomas Kohler ,  Michael Grass ,  Tim Nielsen ,  Peter Koken

发明人： Thomas Kohler ,  Michael Grass ,  Tim Nielsen ,  Peter Koken

IPC分类号： G06K9/00 ,  G06K9/40

CPC分类号： G06T11/006 ,  G06T2211/412

摘要： Using only projection data in one temporal gating window around a certain target phase point may lead to motion artifacts such as blurred images. By using projection data corresponding to three temporal gating windows, which are slightly shifted with respect to each other but at least partially overlap, motion within the gating window may be estimated and, according to an exemplary embodiment of the present invention, this estimation may be used for improving the image quality. Advantageously, only the projection data inside the at least partially overlapping gating windows are used for reconstruction and motion compensation.

摘要翻译： 在某个目标相位点周围的一个时间门控窗口中仅使用投影数据可能会导致运动伪影，如模糊图像。 通过使用对应于相对于彼此略微偏移但至少部分重叠的三个时间门控窗口的投影数据，可以估计门控窗口内的运动，并且根据本发明的示例性实施例，该估计可以是 用于提高图像质量。 有利地，仅将至少部分重叠的门控窗口内的投影数据用于重建和运动补偿。