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1. 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。

2. 发明授权

US07623616B2 Computer tomography apparatus and method for examining an object of interest 失效
标题翻译：用于检查感兴趣对象的计算机断层摄影装置和方法
公开(公告)号：US07623616B2
公开(公告)日：2009-11-24
申请号：US11718724
申请日：2005-11-02
申请人： Andy Ziegler , Thomas Koehler , Michael Grass
发明人： Andy Ziegler , Thomas Koehler , Michael Grass
IPC分类号： G01N23/087 , G01N23/201
CPC分类号： G01T1/2985 , A61B6/027 , A61B6/032 , A61B6/4241 , A61B6/482 , A61B6/483 , G01V5/0025 , G01V5/005 , G06T11/006 , G06T2211/424
摘要： A computer tomography apparatus (100) for examination of an object of interest (107), the computer tomography apparatus (100) comprising detecting elements (123) adapted to detect electromagnetic radiation coherently scattered from an object of interest (107) in an energy-resolving manner, and a determination unit (118) adapted to determine structural information concerning the object of interest (107) based on a statistical analysis of detecting signals received from the detecting elements (123).
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），所述计算机断层摄影装置（100）包括检测元件（123），所述检测元件适于检测能量相关物体（107）相干散射的电磁辐射，以及确定单元（118），其适于基于从所述检测元件（123）接收的检测信号的统计分析来确定关于感兴趣对象的结构信息（107）。

3. 发明授权

US07596204B2 Method and device for the iterative reconstruction of cardiac images 有权
标题翻译：心脏图像重复重建的方法和装置
公开(公告)号：US07596204B2
公开(公告)日：2009-09-29
申请号：US11908415
申请日：2006-03-09
申请人： Andy Ziegler , Michael Grass , Thomas Koehler
发明人： Andy Ziegler , Michael Grass , Thomas Koehler
IPC分类号： A61B6/00
CPC分类号： G06T11/006 , A61B6/027 , G06T2211/424
摘要： The invention relates to a method and a device for the iterative reconstruction of cross-sectional images of the heart (7) of a patient based on projections (P1, . . . P5) from different directions which are for example generated with a helical cone-beam CT scanner. A cardiac weight function (f) quantifies how near the projections (P1, . . . ) are to a given observation phase (To) of the heart cycle based on simultaneously recorded electrocardiographic signals (ECG). The whole set of projections (P1, . . . ) is divided into subsets (S1, . . . ) which each contain only projections corresponding to a similar cardiac weight (f), and an iterative reconstruction algorithm like ART uses in one update or iteration step all projections of such a subset (S1, . . . ) simultaneously.
摘要翻译：本发明涉及一种用于基于来自不同方向的投影（P1，...，P5）迭代重建患者心脏（7）的横截面图像的方法和装置，其例如用螺旋锥体光束CT扫描仪。心脏重量函数（f）基于同时记录的心电图信号（ECG）量化投影（P1，...）附近的心脏周期的给定观察阶段（To）附近。整个投影组（P1 ...）分为子集（S1，...），每个子集只包含与相似的心脏重量（f）相对应的投影，像ART这样的迭代重建算法在一个更新或迭代步骤同时对所述子集（S1，...）进行所有投影。

4. 发明申请

US20080095305A1 Computer Tomography Apparatus And Method For Examining An Object Of Interest 失效
标题翻译：计算机断层扫描仪和方法，用于检查感兴趣的对象
公开(公告)号：US20080095305A1
公开(公告)日：2008-04-24
申请号：US11718724
申请日：2005-11-02
申请人： Andy Ziegler , Thomas Koehler , Michael Grass
发明人： Andy Ziegler , Thomas Koehler , Michael Grass
IPC分类号： A61B6/03
CPC分类号： G01T1/2985 , A61B6/027 , A61B6/032 , A61B6/4241 , A61B6/482 , A61B6/483 , G01V5/0025 , G01V5/005 , G06T11/006 , G06T2211/424
摘要： A computer tomography apparatus (100) for examination of an object of interest (107), the computer tomography apparatus (100) comprising detecting elements (123) adapted to detect electromagnetic radiation coherently scattered from an object of interest (107) in an energy-resolving manner, and a determination unit (118) adapted to determine structural information concerning the object of interest (107) based on a statistical analysis of detecting signals received from the detecting elements (123).
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），所述计算机断层摄影装置（100）包括检测元件（123），所述检测元件适于检测能量相关物体（107）相干散射的电磁辐射，以及确定单元（118），其适于基于从所述检测元件（123）接收的检测信号的统计分析来确定关于感兴趣对象的结构信息（107）。

5. 发明申请

US20080253502A1 Method and Device for the Iterative Reconstruction of Cardiac Images 有权
标题翻译：心脏图像迭代重建方法与装置
公开(公告)号：US20080253502A1
公开(公告)日：2008-10-16
申请号：US11908415
申请日：2006-03-09
申请人： Andy Ziegler , Michael Grass , Thomas Koehler
发明人： Andy Ziegler , Michael Grass , Thomas Koehler
IPC分类号： H05G1/60
CPC分类号： G06T11/006 , A61B6/027 , G06T2211/424
摘要： The invention relates to a method and a device for the iterative reconstruction of cross-sectional images of the heart (7) of a patient based on projections (P1, . . . P5) from different directions which are for example generated with a helical cone-beam CT scanner. A cardiac weight function (f) quantifies how near the projections (P1, . . . ) are to a given observation phase (To) of the heart cycle based on simultaneously recorded electrocardiographic signals (ECG). The whole set of projections (P1, . . . ) is divided into subsets (S1, . . . ) which each contain only projections corresponding to a similar cardiac weight (f), and an iterative reconstruction algorithm like ART uses in one update or iteration step all projections of such a subset (S1, . . . ) simultaneous].
摘要翻译：本发明涉及一种用于基于来自不同方向的投影（P 1，...，P 5）迭代重建病人心脏（7）的横截面图像的方法和装置，其例如用螺旋锥束CT扫描仪。心脏重量函数（f）基于同时记录的心电图信号（ECG）量化投影（P 1，...）附近到心脏周期的给定观察阶段（To）的距离。整个投影组（P 1，...）被划分成子集（S 1，...），每个子集仅包含对应于类似心脏重量（f）的投影，并且像ART这样的迭代重建算法在一个更新或迭代步骤同步所有这样的子集（S 1，...）的投影。

6. 发明申请

US20090274265A1 CONTINUOUS COMPUTER TOMOGRAPHY PERFORMING SUPER-SHORT-SCANS AND STRONGER WEIGHTING OF MOST RECENT DATA 审中-公开
标题翻译：连续计算机图像执行超短扫描和最新数据的强加权重
公开(公告)号：US20090274265A1
公开(公告)日：2009-11-05
申请号：US11913818
申请日：2006-05-03
申请人： Thomas Koehler , Peter Forthmann , Michael Grass
发明人： Thomas Koehler , Peter Forthmann , Michael Grass
IPC分类号： A61B6/00 , H05G1/60
CPC分类号： G01T1/2985 , G01N23/046 , G01N2223/419 , G06T11/005 , G06T2211/412 , G06T2211/421 , G06T2211/428
摘要： A computer tomography apparatus and method, a computer-readable medium and a program element are provided for examining a region of interest (ROI) of an object or patient in real-time. When only a region of interest is to be reconstructed, it is sufficient to rotate the radiation source and detector elements such that they cover a circular arc whose extension is less than π+α, α being the beam angle of the radiation source. This scanning range is called super-short-scan. Super-short-scans produce less data. Consequently image reconstruction is quicker which is very preferable for real-time CT. The CT data can furthermore be weighted in a manner that data detected at the end of a super-short-scan are weighted stronger than data detected at the beginning of a super-short-scan.
摘要翻译：提供计算机断层摄影装置和方法，计算机可读介质和程序元件，用于实时检查对象或患者的感兴趣区域（ROI）。当仅需要重建感兴趣的区域时，旋转辐射源和检测器元件就足以覆盖其延伸小于pi +α的圆弧，α是辐射源的射束角。该扫描范围称为超短扫描。超短扫描会产生较少的数据。因此，图像重建更快，这对于实时CT是非常优选的。此外可以以超短扫描结束时检测到的数据加权比在超短扫描开始时检测到的数据更强的CT数据进行加权。

7. 发明申请

US20070248253A1 Artifact Reduction 有权
标题翻译：人工减少
公开(公告)号：US20070248253A1
公开(公告)日：2007-10-25
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
IPC分类号： G06T11/00
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。

8. 发明申请

US20070183640A1 Gated cone-beam computed tomography reconstruction with motion compensation 审中-公开
标题翻译：带运动补偿的门控锥束计算机断层扫描重建
公开(公告)号：US20070183640A1
公开(公告)日：2007-08-09
申请号：US10599140
申请日：2005-03-18
申请人： Robert Manzke , Thomas Koehler , Michael Grass , Babak Movassaghi
发明人： Robert Manzke , Thomas Koehler , Michael Grass , Babak Movassaghi
IPC分类号： G06K9/00
CPC分类号： G06T11/005 , G06T2211/412
摘要： E.g. in cardiac cone-beam CT, the source path is interrupted due to the fact that the projection data is gated. According to the present invention, a method is provided to obtain projection data corresponding to an uninterrupted source trajectory from such a gated data set. For this purpose, a motion compensation is applied. Advantageously, a complete data set may be determined allowing for an approximate or an exact reconstruction method to be applied to the completed data set without interruption of the image generation.
摘要翻译：例如。在心脏锥束CT中，由于投影数据被门控的原因，源路径被中断。根据本发明，提供了一种从这种门控数据集获得对应于不中断的源轨迹的投影数据的方法。为此，应用运动补偿。有利地，可以确定完整数据集，允许将近似或精确重建方法应用于完成的数据集而不中断图像生成。

9. 发明授权

US07792347B2 Artifact reduction 有权
标题翻译：人工减少
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
IPC分类号： G06K9/00 , A61B6/00 , A61B5/02
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。

10. 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。

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