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公开(公告)号：US20060062346A1
公开(公告)日：2006-03-23
申请号：US10546064
申请日：2004-02-10
申请人： Michael Grass , Robert Manzke , Thomas Kohler
发明人： Michael Grass , Robert Manzke , Thomas Kohler
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。
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公开(公告)号：US07346143B2
公开(公告)日：2008-03-18
申请号：US11573355
申请日：2005-08-02
申请人： Robert Manzke , Michael Grass , Udo Van Stevendaal
发明人： Robert Manzke , Michael Grass , Udo Van Stevendaal
IPC分类号： A61B6/00
摘要： The invention relates to a computer tomography scanner comprising a gantry, on the rotor of which one or more displaceable masses are arranged. During rotation of the rotor about a rotation axis, the position of each mass can be changed perpendicular to the rotation axis by means of an adjustment unit. By retaining the rotary momentum of the rotor, the rotational speed is increased when the masses are moved toward the rotation axis, and vice versa. As a result, it is possible to maintain a specific ratio between the heart rate of the examined patient and the rotational speed even if the heart rate of the patient changes during the examination.
摘要翻译： 本发明涉及一种计算机断层摄影扫描器，其包括在其上布置有一个或多个可移位质量的转子上的台架。 在转子围绕旋转轴线旋转期间，每个质量块的位置可以通过调整单元垂直于旋转轴线改变。 通过保持转子的旋转动量，当质量朝向旋转轴线移动时，转速增加，反之亦然。 结果，即使在检查期间患者的心率发生变化，也可以保持所检查患者的心率与转速之间的比率。
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公开(公告)号：US20070225598A1
公开(公告)日：2007-09-27
申请号：US10596148
申请日：2004-11-26
申请人： Thomas Buelow , Michael Grass , Christian Lorenz , Robert Manzke
发明人： Thomas Buelow , Michael Grass , Christian Lorenz , Robert Manzke
IPC分类号： G06T5/00
CPC分类号： G06T7/11 , G06T2207/10081 , G06T2207/30101
摘要： Coronary artery segmentation is a crucial task in cardiac CT image processing. This is often a tedious task performed manually by an operator. According to the present invention, a method is provided which combines data from multiple cardiac phases during the segmentation process in order to deliver a complete and continuous coronary vessel tree. Advantageously, this may allow for an improved visualization and segmentation of vessels, for example, in coronary CTA.
摘要翻译： 冠状动脉分割是心脏CT图像处理中的关键任务。 这通常是由操作员手动执行的繁琐的任务。 根据本发明，提供了一种在分割过程中组合来自多个心脏相的数据以递送完整且连续的冠状动脉血管树的方法。 有利地，这可以允许例如在冠状动脉CTA中改善血管的可视化和分割。
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公开(公告)号：US20070140411A1
公开(公告)日：2007-06-21
申请号：US10596151
申请日：2004-11-26
申请人： Robert Manzke , Dominic Heuscher , Michael Grass
发明人： Robert Manzke , Dominic Heuscher , Michael Grass
CPC分类号： A61B6/541 , A61B5/0456 , A61B5/1135 , A61B6/027 , A61B6/032 , A61B6/503 , A61B6/504 , G01N23/046 , G01N2223/419 , G06T11/005 , G06T2211/412 , Y10S378/901
摘要： The invention relates to a computer tomography method, in which a periodically moving object, especially a heart, is irradiated by a beam bundle. In that process, intermediate images of one and the same subregion of the object are reconstructed using measured values from time intervals from different periods. That is, in each case exactly one period can be allocated to each intermediate image. The time intervals in the individual periods are adjusted in such a way that, after a reconstruction of the intermediate images using measured values that lie in the adjusted time intervals, a similarity measure applied to the intermediate images of the same subregion is minimized. This method can be applied to one, several or all subregions of the object that are reconstructable using measured values from time intervals from different periods. Finally, a computer tomography image is reconstructed, wherein exclusively measured values from the adjusted time intervals 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，特别是心脏被束束照射。 在该过程中，使用来自不同周期的时间间隔的测量值重建对象的一个和相同子区域的中间图像。 也就是说，在每种情况下，可以将一个周期分配给每个中间图像。 调整各个周期中的时间间隔，使得在使用位于调整时间间隔中的测量值重建中间图像之后，应用于相同子区域的中间图像的相似性度量被最小化。 可以使用来自不同周期的时间间隔的测量值将该方法应用于可重构的对象的一个，几个或所有子区域。 最后，重建计算机断层摄影图像，其中使用来自经调整的时间间隔的专用测量值。
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公开(公告)号：US07813549B2
公开(公告)日：2010-10-12
申请号：US10596148
申请日：2004-11-26
申请人： Thomas Buelow , Michael Grass , Christian Lorenz , Robert Manzke
发明人： Thomas Buelow , Michael Grass , Christian Lorenz , Robert Manzke
CPC分类号： G06T7/11 , G06T2207/10081 , G06T2207/30101
摘要： Coronary artery segmentation is a crucial task in cardiac CT image processing. This is often a tedious task performed manually by an operator. According to the present invention, a method is provided which combines data from multiple cardiac phases during the segmentation process in order to deliver a complete and continuous coronary vessel tree. Advantageously, this may allow for an improved visualization and segmentation of vessels, for example, in coronary CTA.
摘要翻译： 冠状动脉分割是心脏CT图像处理中的关键任务。 这通常是由操作员手动执行的繁琐的任务。 根据本发明，提供了一种在分割过程中组合来自多个心脏相的数据以递送完整且连续的冠状动脉血管树的方法。 有利地，这可以允许例如在冠状动脉CTA中改善血管的可视化和分割。
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公开(公告)号：US07792347B2
公开(公告)日：2010-09-07
申请号：US11570512
申请日：2005-06-14
申请人： Robert Manzke , Michael Grass , Thomas Koehler
发明人： Robert Manzke , Michael Grass , Thomas Koehler
CPC分类号： G06T11/005 , G06T2211/412
摘要： Minimizing the temporal width of the gating window during calculation of the gating function in cardiac CT may not result in best image quality with a maximum of signal-to-noise ratio and minimal artifacts. According to an exemplary embodiment of the present invention, the widths of the gating windows in cardiac CT are selected on the basis of a motion model describing the motion of the heart. According to an aspect of the present invention, the widths of the gating windows are determined by considering the duration of stationary cardiac phases. Thus, artifacts, such as motion artifacts or noise, are minimized.
摘要翻译： 在计算心脏CT中门控功能时，最小化选通窗口的时间宽度可能无法以最大的信噪比和最小的人为因素产生最佳图像质量。 根据本发明的示例性实施例，基于描述心脏运动的运动模型来选择心脏CT中门控窗口的宽度。 根据本发明的一个方面，门控窗口的宽度通过考虑静止心脏相位的持续时间来确定。 因此，最小化诸如运动伪像或噪声的伪影。
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公开(公告)号：US07436925B2
公开(公告)日：2008-10-14
申请号：US10596150
申请日：2004-12-01
申请人： Robert Manzke , Michael Grass
发明人： Robert Manzke , Michael Grass
IPC分类号： A61B6/03
CPC分类号： G06T11/005 , A61B6/027 , A61B6/032 , A61B6/469 , A61B6/503 , A61B6/504 , A61B6/541 , G06T2211/412
摘要： The invention relates to a computer tomography method in which a bundle of rays passes through an object that is moving periodically, in particular a heart. During the acquisition of measured values, a movement signal dependent on the movement of the object is sensed. From this movement signal are determined periodically repeated phases of movement, after which a plurality of intermediate images of a region of the object are reconstructed, in particular at a low resolution, using measured values whose times of acquisition were situated in different phases of movement, thus enabling each intermediate image to be assigned to a phase of movement. The phase of movement in which the object moved least in the region is then identified by determining the intermediate image having the fewest motion artifacts. Finally, a computer tomographic image of the region is reconstructed, in particular with a high spatial resolution, from measured values whose times of acquisition were situated in the phase of movement in which there was the least movement by the object in said region.
摘要翻译： 本发明涉及一种计算机断层摄影方法，其中一束光线穿过周期性地移动的物体，特别是心脏。 在获取测量值期间，感测到取决于物体的移动的移动信号。 从该移动信号周期性地确定重复的移动相位，之后使用其采集时间位于不同移动阶段的测量值来重构物体区域的多个中间图像，特别是以低分辨率被重建， 从而能够将每个中间图像分配给运动阶段。 然后通过确定具有最少的运动伪像的中间图像来识别目标在该区域中最小移动的移动阶段。 最后，该区域的计算机断层图像，特别是具有高空间分辨率，由获取时间位于运动阶段的测量值，其中所述区域中物体的运动最少。
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公开(公告)号：US20070183557A1
公开(公告)日：2007-08-09
申请号：US11573355
申请日：2005-08-02
申请人： Robert Manzke , Michael Grass , Udo Van Stevendaal
发明人： Robert Manzke , Michael Grass , Udo Van Stevendaal
摘要： The invention relates to a computer tomography scanner comprising a gantry, on the rotor of which one or more displaceable masses are arranged. During rotation of the rotor about a rotation axis, the position of each mass can be changed perpendicular to the rotation axis by means of an adjustment unit. By retaining the rotary momentum of the rotor, the rotational speed is increased when the masses are moved toward the rotation axis, and vice versa. As a result, it is possible to maintain a specific ratio between the heart rate of the examined patient and the rotational speed even if the heart rate of the patient changes during the examination.
摘要翻译： 本发明涉及一种计算机断层摄影扫描器，其包括在其上布置有一个或多个可移位质量的转子上的台架。 在转子围绕旋转轴线旋转期间，每个质量块的位置可以通过调整单元垂直于旋转轴线改变。 通过保持转子的旋转动量，当质量朝向旋转轴线移动时，转速增加，反之亦然。 结果，即使在检查期间患者的心率发生变化，也可以保持所检查患者的心率与转速之间的比率。
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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。
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公开(公告)号：US20070086562A1
公开(公告)日：2007-04-19
申请号：US10596150
申请日：2004-12-01
申请人： Robert Manzke , Michael Grass
发明人： Robert Manzke , Michael Grass
CPC分类号： G06T11/005 , A61B6/027 , A61B6/032 , A61B6/469 , A61B6/503 , A61B6/504 , A61B6/541 , G06T2211/412
摘要： The invention relates to a computer tomography method in which a bundle of rays passes through an object that is moving periodically, in particular a heart. During the acquisition of measured values, a movement signal dependent on the movement of the object is sensed. From this movement signal are determined periodically repeated phases of movement, after which a plurality of intermediate images of a region of the object are reconstructed, in particular at a low resolution, using measured values whose times of acquisition were situated in different phases of movement, thus enabling each intermediate image to be assigned to a phase of movement. The phase of movement in which the object moved least in the region is then identified by determining the intermediate image having the fewest motion artifacts. Finally, a computer tomographic image of the region is reconstructed, in particular with a high spatial resolution, from measured values whose times of acquisition were situated in the phase of movement in which there was the least movement by the object in said region.
摘要翻译： 本发明涉及一种计算机断层摄影方法，其中一束光线穿过周期性地移动的物体，特别是心脏。 在获取测量值期间，感测到取决于物体的移动的移动信号。 从该移动信号周期性地确定重复的移动相位，之后使用其采集时间位于不同移动阶段的测量值来重建物体区域的多个中间图像，特别是以低分辨率， 从而能够将每个中间图像分配给运动阶段。 然后通过确定具有最少的运动伪像的中间图像来识别目标在该区域中最小移动的移动阶段。 最后，该区域的计算机断层图像，特别是具有高空间分辨率，由获取时间位于运动阶段的测量值，其中所述区域中物体的运动最少。
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