公开(公告)号：US20080205727A1

公开(公告)日：2008-08-28

申请号：US11815606

申请日：2006-01-31

申请人： Claas Bontus ,  Michael Grass ,  Thomas Kohler

发明人： Claas Bontus ,  Michael Grass ,  Thomas Kohler

IPC分类号： G06K9/00

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：US20070019776A1

公开(公告)日：2007-01-25

申请号：US10570088

申请日：2004-08-23

申请人： Claas Bontus ,  Thomas Kohler ,  Michael Grass

发明人： Claas Bontus ,  Thomas Kohler ,  Michael Grass

IPC分类号： H05G1/60 ,  A61B6/00 ,  G01N23/00 ,  G21K1/12

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：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：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：US08437524B2

公开(公告)日：2013-05-07

申请号：US12521899

申请日：2008-01-02

申请人： Claas Bontus ,  Michael Grass ,  Carsten Oliver Schirra ,  Udo Van Stevendaal ,  Guy Lavi

发明人： Claas Bontus ,  Michael Grass ,  Carsten Oliver Schirra ,  Udo Van Stevendaal ,  Guy Lavi

IPC分类号： G06K9/00

CPC分类号： G06T7/20 ,  A61B5/0402 ,  A61B6/027 ,  A61B6/032 ,  A61B6/469 ,  A61B6/503 ,  A61B6/504 ,  A61B6/541

摘要： The invention relates to an imaging system for imaging a region of interest comprising a moving object, which moves less in small motion phases than in large motion phases. Detection values are provided and a small motion determination unit (15) determines the motion of the object in the region of interest in the small motion phases from the 5 detection values. A large motion determination unit (16) determines the motion of the object in the large motion phases from the determined motion of the object in the small motion phases. A reconstruction unit (17) reconstructs an image of the region of interest from the detection values, wherein the reconstruction unit (17) is adapted for performing a motion compensation using the determined motions in the small and large motion phases.

摘要翻译： 本发明涉及一种用于对感兴趣的区域成像的成像系统，该成像系统包括移动物体，该运动物体在小运动相位上比在大运动相位中运动较少。 提供检测值，并且小运动确定单元（15）从5个检测值确定在小运动相位中的感兴趣区域中的对象的运动。 大运动确定单元（16）根据所确定的小运动阶段中的物体的运动来确定物体在大运动相位中的运动。 重建单元（17）从检测值重建感兴趣区域的图像，其中重建单元（17）适于使用在小的和大的运动阶段中确定的运动来执行运动补偿。

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。

公开(公告)号：US20090310825A1

公开(公告)日：2009-12-17

申请号：US12521899

申请日：2008-01-02

申请人： Claas Bontus ,  Michael Grass ,  Carsten Oliver Schirra ,  Udo Van Stevendaal ,  Guy Lavi

发明人： Claas Bontus ,  Michael Grass ,  Carsten Oliver Schirra ,  Udo Van Stevendaal ,  Guy Lavi

IPC分类号： G06K9/00

CPC分类号： G06T7/20 ,  A61B5/0402 ,  A61B6/027 ,  A61B6/032 ,  A61B6/469 ,  A61B6/503 ,  A61B6/504 ,  A61B6/541

摘要： The invention relates to an imaging system for imaging a region of interest comprising a moving object, which moves less in small motion phases than in large motion phases. Detection values are provided and a small motion determination unit (15) determines the motion of the object in the region of interest in the small motion phases from the 5 detection values. A large motion determination unit (16) determines the motion of the object in the large motion phases from the determined motion of the object in the small motion phases. A reconstruction unit (17) reconstructs an image of the region of interest from the detection values, wherein the reconstruction unit (17) is adapted for performing a motion compensation using the determined motions in the small and large motion phases.

摘要翻译： 本发明涉及一种用于对感兴趣的区域成像的成像系统，该成像系统包括移动物体，该运动物体在小运动相位上比在大运动相位中运动较少。 提供检测值，并且小运动确定单元（15）从5个检测值确定在小运动相位中的感兴趣区域中的对象的运动。 大运动确定单元（16）根据所确定的小运动阶段中的物体的运动来确定物体在大运动相位中的运动。 重建单元（17）从检测值重建感兴趣区域的图像，其中重建单元（17）适于使用在小的和大的运动阶段中确定的运动来执行运动补偿。

公开(公告)号：US20090208077A1

公开(公告)日：2009-08-20

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 ,  A61B6/03

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。

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。

公开(公告)号：US20080013676A1

公开(公告)日：2008-01-17

申请号：US11570101

申请日：2005-06-09

申请人： Claas Bontus ,  Thomas Kohler

发明人： Claas Bontus ,  Thomas Kohler

IPC分类号： G01N23/00 ,  G06K9/00

CPC分类号： A61B6/4042 ,  A61B6/027 ,  A61B6/032 ,  A61B6/4035 ,  A61B6/4085 ,  G06T11/005

摘要： The invention relates to a helical cone beam computed tomography method wherein a radiation source moves along a helical trajectory with respect to an object in a nPi relative movement. Measured values are partially differentiated with respect to the angular position of the radiation source on the helical trajectory, and intermediate filter values are generated by filtering along filter lines with a κ-filter. Each of the intermediate filter values is multiplied by a filter factor wherein the filter factor for intermediate filter values, which have been generated by filtering along filter lines running only within the Pi window, is larger than or equal to filter factors, by which intermediate filter values are multiplied, which have been generated by filtering along filter lines running within and outside the Pi window. Intermediate filter values generated for a measured value are added to a final filter value, and the final filter values are back projected to reconstruct an image of the object.

摘要翻译： 本发明涉及一种螺旋锥束计算机断层摄影方法，其中辐射源相对于nPi相对运动中的物体沿着螺旋轨迹移动。 相对于螺旋轨迹上的辐射源的角位置，测量值被部分地区分，并且通过使用κ过滤器沿着滤波器线进行滤波来生成中间滤波器值。 每个中间滤波器值乘以滤波器因子，其中通过仅在Pi窗口内运行的滤波器线进行滤波而产生的中间滤波器值的滤波器因子大于或等于滤波器因数，中间滤波器 通过对在Pi窗口内外运行的滤波器线进行滤波生成值。 为测量值生成的中间过滤器值被添加到最终过滤器值，并且返回最后的过滤器值以重建对象的图像。