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1. 发明授权

US07672490B2 Motion artifacts compensation 失效
标题翻译：运动假象补偿
公开(公告)号：US07672490B2
公开(公告)日：2010-03-02
申请号：US10597871
申请日：2005-02-04
申请人： Thomas Kohler , Roland Proksa , Claas Bontus
发明人： Thomas Kohler , Roland Proksa , Claas Bontus
IPC分类号： G06K9/00 , A61B6/00 , A61B5/05
CPC分类号： G06T11/005 , A61B6/027 , G06T2211/412
摘要： Motion is one of the most critical sources of artifacts in helical conebeam CT. By comparing opposite rays corresponding to projection data, the amount of motion may be estimated and, in the following suppression of corresponding motion artifacts may be performed according to an exemplary embodiment of the present invention. The method of motion artifact compensation may be implemented in both approximate reconstruction algorithms and exact reconstruction algorithms. Advantageously, motion during the data acquisition is detected automatically and related motion artifacts may be suppressed adaptively.
摘要翻译：运动是螺旋锥束CT中最重要的文物来源之一。通过比较与投影数据相对应的相对射线，可以估计运动量，并且可以根据本发明的示例性实施例来执行以下对相应运动伪像的抑制。运动伪像补偿的方法可以在近似重建算法和精确重构算法中实现。有利地，自动检测数据采集期间的运动，并且可以自适应地抑制相关的运动伪像。

2. 发明申请

US20070177713A1 Motion artifacts compensation 失效
标题翻译：运动假象补偿
公开(公告)号：US20070177713A1
公开(公告)日：2007-08-02
申请号：US10597871
申请日：2005-02-04
申请人： Thomas Kohler , Roland Proksa , Claas Bontus
发明人： Thomas Kohler , Roland Proksa , Claas Bontus
IPC分类号： H05G1/60 , G06K9/00 , G01N23/00 , G21K1/12
CPC分类号： G06T11/005 , A61B6/027 , G06T2211/412
摘要： Motion is one of the most critical sources of artifacts in helical conebeam CT. By comparing opposite rays corresponding to projection data, the amount of motion may be estimated and, in the following suppression of corresponding motion artifacts may be performed according to an exemplary embodiment of the present invention. The method of motion artifact compensation may be implemented in both approximate reconstruction algorithms and exact reconstruction algorithms. Advantageously, motion during the data acquisition is detected automatically and related motion artifacts may be suppressed adaptively.
摘要翻译：运动是螺旋锥束CT中最重要的文物来源之一。通过比较与投影数据相对应的相对射线，可以估计运动量，并且可以根据本发明的示例性实施例来执行以下对相应运动伪像的抑制。运动伪像补偿的方法可以在近似重建算法和精确重构算法中实现。有利地，自动检测数据采集期间的运动，并且可以自适应地抑制相关的运动伪像。

3. 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。

4. 发明授权

US08401144B2 Method and apparatus for correcting artifacts in circular CT scans 有权
标题翻译：用于校正圆形CT扫描中的伪影的方法和装置
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。

5. 发明申请

US20110058644A1 SOURCE AND/OR DETECTOR POSITIONING SYSTEM 有权
标题翻译：源和/或检测器定位系统
公开(公告)号：US20110058644A1
公开(公告)日：2011-03-10
申请号：US12990278
申请日：2009-04-30
申请人： Axel Thran , Claas Bontus , Peter Forthmann , Roland Proksa , Ronald B. Sharpless , Dominic J. Heuscher , Felix Peeters , Johannes Bathazar Maria Soetens
发明人： Axel Thran , Claas Bontus , Peter Forthmann , Roland Proksa , Ronald B. Sharpless , Dominic J. Heuscher , Felix Peeters , Johannes Bathazar Maria Soetens
IPC分类号： A61B6/03 , G01T1/24
CPC分类号： A61B6/4447 , A61B6/06 , A61B6/4021
摘要： A medical imaging system includes a generally stationary gantry (102) and a rotating gantry (106), rotatably supported by the generally stationary gantry (102), that rotates about a longitudinal axis around an examination region. The medical imaging system further includes a radiation source (112) that emits a radiation beam that traverses the examination region. The radiation source (112) is moveably affixed to the rotating gantry (106) so as to translate in a direction of the longitudinal axis with respect to the rotating gantry (106) while scanning a subject in the examination region. The medical imaging system further includes a detector array (120) that detects the radiation beam that traverses the examination region and generates a signal indicative thereof. The detector array (120) is moveably affixed to the rotating gantry (106) so as to move in coordination with the radiation source (112) while scanning the subject in the examination region.
摘要翻译：医疗成像系统包括大致固定的机架（102）和旋转支架（106），旋转机架（106）由大体上固定的机架（102）可旋转地支撑，围绕检查区域围绕纵向轴线旋转。医疗成像系统还包括发射穿过检查区域的辐射束的辐射源（112）。辐射源（112）可移动地固定到旋转机架（106）上，以便在扫描检查区域中的被检体的同时相对于旋转台架（106）在纵向轴线的方向上平移。医疗成像系统还包括检测器阵列（120），其检测穿过检查区域的辐射束并产生指示其的信号。检测器阵列（120）可移动地固定到旋转机架（106），以在扫描检查区域中的对象时与辐射源（112）协调地移动。

6. 发明授权

US08693621B2 Source and/or detector positioning system 有权
标题翻译：源和/或探测器定位系统
公开(公告)号：US08693621B2
公开(公告)日：2014-04-08
申请号：US12990278
申请日：2009-04-30
申请人： Axel Thran , Claas Bontus , Peter Forthmann , Roland Proksa , Ronald B. Sharpless , Dominic J. Heuscher , Felix Peeters , Johannes Bathazar Maria Soetens
发明人： Axel Thran , Claas Bontus , Peter Forthmann , Roland Proksa , Ronald B. Sharpless , Dominic J. Heuscher , Felix Peeters , Johannes Bathazar Maria Soetens
IPC分类号： A61B6/03
CPC分类号： A61B6/4447 , A61B6/06 , A61B6/4021
摘要： A medical imaging system includes a generally stationary gantry (102) and a rotating gantry (106), rotatably supported by the generally stationary gantry (102), that rotates about a longitudinal axis around an examination region. The medical imaging system further includes a radiation source (112) that emits a radiation beam that traverses the examination region. The radiation source (112) is moveably affixed to the rotating gantry (106) so as to translate in a direction of the longitudinal axis with respect to the rotating gantry (106) while scanning a subject in the examination region. The medical imaging system further includes a detector array (120) that detects the radiation beam that traverses the examination region and generates a signal indicative thereof. The detector array (120) is moveably affixed to the rotating gantry (106) so as to move in coordination with the radiation source (112) while scanning the subject in the examination region.
摘要翻译：医疗成像系统包括大致固定的机架（102）和旋转支架（106），旋转机架（106）由大体上固定的机架（102）可旋转地支撑，围绕检查区域围绕纵向轴线旋转。医疗成像系统还包括发射穿过检查区域的辐射束的辐射源（112）。辐射源（112）可移动地固定到旋转机架（106）上，以便在扫描检查区域中的被检体的同时相对于旋转台架（106）在纵向轴线的方向上平移。医疗成像系统还包括检测器阵列（120），其检测穿过检查区域的辐射束并产生指示其的信号。检测器阵列（120）可移动地固定到旋转机架（106），以在扫描检查区域中的对象时与辐射源（112）协调地移动。

7. 发明授权

US07570730B2 Multiple focus acquisition 有权
标题翻译：多重对焦采集
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。

8. 发明申请

US20080013676A1 Computerized Tomography Method With Helical Relative Movement and Conical Beam 有权
标题翻译：具有螺旋相对运动和锥形梁的计算机断层扫描方法
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。

9. 发明申请

US20080095299A1 Multiple focus acquisition 有权
标题翻译：多重对焦采集
公开(公告)号：US20080095299A1
公开(公告)日：2008-04-24
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： G06T11/00 , G06T9/00
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。

10. 发明授权

US07430270B2 Computerized tomography method with helical relative movement and conical beam 有权
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：US07430270B2
公开(公告)日：2008-09-30
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： H05G1/60
CPC分类号： A61B6/4042 , A61B6/027 , A61B6/032 , A61B6/4035 , A61B6/4085 , G06T11/005
摘要： The invention relates to a computerized tomography method, wherein a radiation source executes an nPi relative movement along a helix with respect to an object. Acquired measured values are partially derived according to the angular position of the radiation source on the helix and intermediate filter values are generated by filtering the derived measured values along the filter lines with a k filter. Each intermediate filter value is multiplied by a filter factor, where the filter factor for intermediate filter values that have been generated by filtering the derived measured values along filter lines, which run exclusively within the Pi window, is greater than or equal to those filter factors by which the intermediate filter values are multiplied, which have been generated by filtering the derived measured values along filter lines, which run inside as well as outside the Pi window. The intermediate filter values assigned to a measured value are added to a filter value and the filter values are back-projected for reconstruction of a CT image.
摘要翻译：本发明涉及一种计算机断层摄影方法，其中辐射源相对于物体沿螺旋线执行nPi相对运动。获得的测量值根据辐射源在螺旋上的角位置被部分地导出，并且通过用k滤波器对沿滤波器线的导出的测量值进行滤波来生成中间滤波器值。每个中间滤波器值乘以一个滤波器因子，其中通过滤波器线产生的中间滤波器值的滤波因子，该滤波器值仅在Pi窗口内运行，大于或等于那些滤波器因子通过它们乘以中间滤波器值，其通过沿着沿窗口内部以及外部的滤波器线过滤导出的测量值而产生。分配给测量值的中间滤波器值被添加到滤波器值，并且滤波器值被反投影用于重建CT图像。

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