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1. 发明申请

US20130279778A1 IMAGING SYSTEM FOR IMAGING AN OBJECT 有权
标题翻译：用于成像对象的成像系统
公开(公告)号：US20130279778A1
公开(公告)日：2013-10-24
申请号：US13978166
申请日：2012-01-04
申请人： Peter Forthmann , Thomas Koehler
发明人： Peter Forthmann , Thomas Koehler
IPC分类号： G06T11/00
CPC分类号： G06T11/006 , G06T2211/416 , G06T2211/424
摘要： The invention relates to an imaging system for imaging an object. Projection data of the object are acquired by using a radiation source emitting primary radiation (14) from a primary focal spot (15) and unwanted secondary radiation (16) from secondary focal spots (17). A first image of the object is reconstructed from the acquired projection data, a forward projection of the secondary radiation through the first image is simulated for generating secondary projection data, and a second image is generated based on the acquired projection data and the secondary projection data. Since the secondary projection data, which can generally cause image artifacts, are determined, the reconstruction unit can consider these unwanted secondary projection data while reconstructing the second image, in order to reduce the influence of the secondary projection data on the reconstructed second image, thereby improving the image quality.
摘要翻译：本发明涉及一种用于对物体成像的成像系统。通过使用从主焦点（15）发射主要辐射（14）的辐射源和来自次焦点（17）的不期望的次级辐射（16））来获取对象的投影数据。从获取的投影数据重建物体的第一图像，模拟通过第一图像的次级辐射的向前投影用于产生二次投影数据，并且基于所获取的投影数据和二次投影数据生成第二图像。由于确定了通常可以引起图像伪影的二次投影数据，所以重建单元可以在重构第二图像的同时考虑这些不需要的二次投影数据，以便减少二次投影数据对重构的第二图像的影响，由此提高图像质量。

2. 发明授权

US07782997B2 Reconstruction algorithm for object point outside the scan-field-of-view 有权
标题翻译：对象点的重建算法在扫描视野外
公开(公告)号：US07782997B2
公开(公告)日：2010-08-24
申请号：US11994700
申请日：2006-07-04
申请人： Thomas Koehler , Peter Forthmann
发明人： Thomas Koehler , Peter Forthmann
IPC分类号： A61B6/00
CPC分类号： G06T11/006 , A61B6/027 , G06T2211/432
摘要： CT scanners have a certain scan-field-of-view defined by the fan-angle of the system. According to an exemplary embodiment of the present invention, object points outside the scan-field-of-view may be reconstructed on the basis of a system of linear equations which may be solved iteratively and with reasonable effort. Therefore, explicit regularization techniques may be applied to recover the unknown object function.
摘要翻译： CT扫描仪具有由系统的扇角定义的特定扫描视场。根据本发明的示例性实施例，可以基于可以以合理的努力迭代地解决的线性方程式的系统来重构扫描视场外的物点。因此，可以应用明确的正则化技术来恢复未知对象的功能。

3. 发明授权

US09478050B2 Imaging system for imaging an object 有权
标题翻译：用于成像对象的成像系统
公开(公告)号：US09478050B2
公开(公告)日：2016-10-25
申请号：US13978166
申请日：2012-01-04
申请人： Peter Forthmann , Thomas Koehler
发明人： Peter Forthmann , Thomas Koehler
IPC分类号： G06K9/00 , G06T11/00
CPC分类号： G06T11/006 , G06T2211/416 , G06T2211/424
摘要： The invention relates to an imaging system for imaging an object. Projection data of the object are acquired by using a radiation source emitting primary radiation (14) from a primary focal spot (15) and unwanted secondary radiation (16) from secondary focal spots (17). A first image of the object is reconstructed from the acquired projection data, a forward projection of the secondary radiation through the first image is simulated for generating secondary projection data, and a second image is generated based on the acquired projection data and the secondary projection data. Since the secondary projection data, which can generally cause image artifacts, are determined, the reconstruction unit can consider these unwanted secondary projection data while reconstructing the second image, in order to reduce the influence of the secondary projection data on the reconstructed second image, thereby improving the image quality.
摘要翻译：本发明涉及一种用于对物体成像的成像系统。通过使用从主焦点（15）发射主要辐射（14）的辐射源和来自次焦点（17）的不期望的次级辐射（16））来获取对象的投影数据。从获取的投影数据重建物体的第一图像，模拟通过第一图像的次级辐射的向前投影用于产生二次投影数据，并且基于所获取的投影数据和二次投影数据生成第二图像。由于确定了通常可以引起图像伪影的二次投影数据，所以重建单元可以在重构第二图像的同时考虑这些不需要的二次投影数据，以便减少二次投影数据对重构的第二图像的影响，由此提高图像质量。

4. 发明授权

US08385621B2 Method for reconstruction images and reconstruction system for reconstructing images 有权
标题翻译：重建图像和重建图像重构系统的方法
公开(公告)号：US08385621B2
公开(公告)日：2013-02-26
申请号：US12296116
申请日：2007-03-15
申请人： Thomas Koehler , Peter Forthmann
发明人： Thomas Koehler , Peter Forthmann
IPC分类号： G06K9/20 , G06T1/00
CPC分类号： G06T11/005 , A61B6/027 , G06T7/30 , G06T2207/30004
摘要： A reconstruction method for an image of an object, the reconstruction method comprising receiving a first projection data set representing information about said object, receiving a second projection data set representing information about said object, reconstructing a first image of said object using the first projection data set, reconstructing a second image of said object using the second projection data set, performing a registration between the first image and the second image, and fusing the first image and the second image to said image of said object, wherein the first projecting data set and the second projecting data set are achieved by using a single radiation type.
摘要翻译：一种用于对象的图像的重建方法，所述重建方法包括接收表示关于所述对象的信息的第一投影数据集，接收表示关于所述对象的信息的第二投影数据集，使用所述第一投影数据重建所述对象的第一图像使用所述第二投影数据集重建所述对象的第二图像，执行所述第一图像和所述第二图像之间的对准，以及将所述第一图像和所述第二图像融合到所述对象的所述图像，其中，所述第一投影数据集并且通过使用单个辐射类型来实现第二投影数据集。

5. 发明申请

US20110182400A1 METHOD AND APPARATUS TO IMPROVE CT IMAGE ACQUISITION USING A DISPLACED GEOMETRY 有权
标题翻译：使用位移几何来改进CT图像采集的方法和装置
公开(公告)号：US20110182400A1
公开(公告)日：2011-07-28
申请号：US13120660
申请日：2009-10-05
申请人： Peter Forthmann , Thomas Koehler , Udo Van Stevendaal , Matthias Bertram , Steffen Wiesner , Colas Schretter
发明人： Peter Forthmann , Thomas Koehler , Udo Van Stevendaal , Matthias Bertram , Steffen Wiesner , Colas Schretter
IPC分类号： A61B6/03 , G01N23/04
CPC分类号： A61B6/032 , A61B5/107 , A61B6/027
摘要： A method and apparatus are provided to improve CT image acquisition using a displaced acquisition geometry. A CT apparatus may be used having a source (102) and a detector (104) transversely displaced from a center (114) of a field of view (118) during acquisition of the projection data. The amount of transverse displacement may be determined based on the size of the object (108). The source and the detector may be adjusted to vary the size of the transverse field of view. The first data set acquired by the detector may be reconstructed and used to simulate missing projection data that could not be acquired by the detector at each projection angle. The measured projection data and the simulated projection data may be used to obtain a second data set. The second data set may be compared to the first data set to produce a corrected data set.
摘要翻译：提供了一种方法和装置，用于改善使用位移采集几何形状的CT图像采集。可以使用CT装置，在获取投影数据期间具有从视场（118）的中心（114）横向移位的源（102）和检测器（104）。可以基于物体（108）的尺寸来确定横向位移量。源和检测器可以被调节以改变横向视场的大小。由检测器获取的第一数据集可以被重构并用于模拟在每个投影角度不能由检测器获取的丢失的投影数据。所测量的投影数据和模拟投影数据可用于获得第二数据集。可以将第二数据集与第一数据集进行比较以产生校正数据集。

6. 发明申请

US20090310737A1 METHOD FOR COMPUTER TOMOGRAPHY, AND COMPUTER TOMOGRAPH 审中-公开
标题翻译：计算机图形学和计算机图形学的方法
公开(公告)号：US20090310737A1
公开(公告)日：2009-12-17
申请号：US11721543
申请日：2005-12-13
申请人： Peter Forthmann , Thomas Koehler , Robert Manzke , Michael Grass , Andy Ziegler
发明人： Peter Forthmann , Thomas Koehler , Robert Manzke , Michael Grass , Andy Ziegler
IPC分类号： A61B6/00
CPC分类号： A61B6/541 , A61B6/027 , A61B6/032 , A61B6/4085 , A61B6/503
摘要： According to the invention, there is provided a method of recording images of the heart in computer tomography, in which, in order to prevent movement artifacts, the images are reconstructed on the basis of similar movement states of the heart and different radiation intensities are used for different movement states. Also provided is a computer tomograph for recording images of the heart in computer tomography by means of time windows which exhibit similar movement states of the heart in order to prevent movement artifacts, said computer tomograph comprising a control device which controls a radiation source with different radiation intensities for different movement states. Furthermore provided is a computer program for a computer tomograph for recording images of the heart in computer tomography by means of time windows which exhibit similar movement states of the heart in order to prevent movement artifacts, and for controlling a radiation source with different radiation intensities for different movement states.
摘要翻译：根据本发明，提供了一种在计算机断层摄影中记录心脏图像的方法，其中为了防止运动伪像，基于心脏的相似运动状态重建图像，并且使用不同的辐射强度对于不同的运动状态。还提供了一种用于在计算机断层摄影中记录心脏图像的计算机断层摄影装置，其通过显示相似的心脏运动状态以防止运动伪像的时间窗口，所述计算机断层摄影机包括控制具有不同辐射的辐射源的控制装置不同运动状态的强度。此外还提供了一种计算机断层摄影机的计算机程序，用于通过时间窗口在计算机断层摄影中记录心脏的图像，所述时间窗口表现出相似的心脏运动状态以便防止运动伪像，并且用于控制具有不同辐射强度的辐射源不同的运动状态。

7. 发明授权

US08379791B2 Method and apparatus to improve CT image acquisition using a displaced geometry 有权
标题翻译：使用位移几何来改善CT图像采集的方法和装置
公开(公告)号：US08379791B2
公开(公告)日：2013-02-19
申请号：US13120660
申请日：2009-10-05
申请人： Peter Forthmann , Thomas Koehler , Udo Van Stevendaal , Matthias Bertram , Steffen Wiesner , Colas Schretter
发明人： Peter Forthmann , Thomas Koehler , Udo Van Stevendaal , Matthias Bertram , Steffen Wiesner , Colas Schretter
IPC分类号： A61B6/00
CPC分类号： A61B6/032 , A61B5/107 , A61B6/027
摘要： A method and apparatus are provided to improve CT image acquisition using a displaced acquisition geometry. A CT apparatus may be used having a source (102) and a detector (104) transversely displaced from a center (114) of a field of view (118) during acquisition of the projection data. The amount of transverse displacement may be determined based on the size of the object (108). The source and the detector may be adjusted to vary the size of the transverse field of view. The first data set acquired by the detector may be reconstructed and used to simulate missing projection data that could not be acquired by the detector at each projection angle. The measured projection data and the simulated projection data may be used to obtain a second data set. The second data set may be compared to the first data set to produce a corrected data set.
摘要翻译：提供了一种方法和装置，用于改善使用位移采集几何形状的CT图像采集。可以使用CT装置，在获取投影数据期间具有从视场（118）的中心（114）横向移位的源（102）和检测器（104）。可以基于物体（108）的尺寸来确定横向位移量。源和检测器可以被调节以改变横向视场的大小。由检测器获取的第一数据集可以被重构并用于模拟在每个投影角度不能由检测器获取的丢失的投影数据。所测量的投影数据和模拟投影数据可用于获得第二数据集。可以将第二数据集与第一数据集进行比较以产生校正数据集。

8. 发明申请

US20100303381A1 IMAGING SYSTEM AND IMAGING METHOD FOR IMAGING A REGION OF INTEREST 有权
标题翻译：用于成像区域的成像系统和成像方法
公开(公告)号：US20100303381A1
公开(公告)日：2010-12-02
申请号：US12600062
申请日：2008-05-13
申请人： Thomas Koehler , Peter Forthmann
发明人： Thomas Koehler , Peter Forthmann
IPC分类号： G06K9/40
CPC分类号： G06T11/006 , G06T2211/424
摘要： The invention relates to an imaging system for imaging a region of interest, in particular to a computed tomography system. First data for generating an image of the region of interest are provided, which are used by a reconstruction unit (12) for reconstructing an image of the region of interest using an adaptable artefact correction method. Second data are provided by simulating the providing of the first data using the reconstructed image of the region of interest by a second data providing unit (13). A deviation determination unit (14) determines a deviation between the first and second data. An adaptation unit (15) adapts the artefact correction method such that the deviation between the first and second data is reduced and the reconstruction unit (12) reconstructs an image of the region of interest from first the data using the adapted artefact correction method.
摘要翻译：本发明涉及用于对感兴趣的区域，特别是计算机断层摄影系统进行成像的成像系统。提供了用于生成感兴趣区域的图像的第一数据，其被重建单元（12）用于使用适应性伪影校正方法重建感兴趣区域的图像。通过由第二数据提供单元（13）模拟使用感兴趣区域的重建图像来提供第一数据来提供第二数据。偏差确定单元（14）确定第一和第二数据之间的偏差。适应单元（15）适应伪影校正方法，使得第一和第二数据之间的偏差减小，并且重建单元（12）使用适应的人工制品校正方法从第一数据重建感兴趣区域的图像。

9. 发明申请

US20080226016A1 Reconstruction Algorithm for Object Point Outside the Scan-Field-of-View 有权
标题翻译：扫描视野以外对象点的重建算法
公开(公告)号：US20080226016A1
公开(公告)日：2008-09-18
申请号：US11994700
申请日：2006-07-04
申请人： Thomas Koehler , Peter Forthmann
发明人： Thomas Koehler , Peter Forthmann
IPC分类号： A61B6/00
CPC分类号： G06T11/006 , A61B6/027 , G06T2211/432
摘要： CT scanners have a certain scan-field-of-view defined by the fan-angle of the system. According to an exemplary embodiment of the present invention, object points outside the scan-field-of-view may be reconstructed on the basis of a system of linear equations which may be solved iteratively and with reasonable effort. Therefore, explicit regularization techniques may be applied to recover the unknown object function.
摘要翻译： CT扫描仪具有由系统的扇角定义的特定扫描视场。根据本发明的示例性实施例，可以基于可以以合理的努力迭代地解决的线性方程式的系统来重构扫描视场外的物点。因此，可以应用明确的正则化技术来恢复未知对象的功能。

10. 发明授权

US08526757B2 Imaging system and imaging method for imaging a region of interest 有权
标题翻译：用于成像感兴趣区域的成像系统和成像方法
公开(公告)号：US08526757B2
公开(公告)日：2013-09-03
申请号：US12600062
申请日：2008-05-13
申请人： Thomas Koehler , Peter Forthmann
发明人： Thomas Koehler , Peter Forthmann
IPC分类号： G06K9/40
CPC分类号： G06T11/006 , G06T2211/424
摘要： The invention relates to an imaging system for imaging a region of interest, in particular to a computed tomography system. First data for generating an image of the region of interest are provided, which are used by a reconstruction unit (12) for reconstructing an image of the region of interest using an adaptable artefact correction method. Second data are provided by simulating the providing of the first data using the reconstructed image of the region of interest by a second data providing unit (13). A deviation determination unit (14) determines a deviation between the first and second data. An adaptation unit (15) adapts the artefact correction method such that the deviation between the first and second data is reduced and the reconstruction unit (12) reconstructs an image of the region of interest from first the data using the adapted artefact correction method.
摘要翻译：本发明涉及用于对感兴趣的区域，特别是计算机断层摄影系统进行成像的成像系统。提供了用于生成感兴趣区域的图像的第一数据，其被重建单元（12）用于使用适应性伪影校正方法重建感兴趣区域的图像。通过由第二数据提供单元（13）模拟使用感兴趣区域的重建图像来提供第一数据来提供第二数据。偏差确定单元（14）确定第一和第二数据之间的偏差。适应单元（15）适应伪影校正方法，使得第一和第二数据之间的偏差减小，并且重建单元（12）使用适应的人工制品校正方法从第一数据重建感兴趣区域的图像。

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