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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。

3. 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。

4. 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。

5. 发明申请

US20110002444A1 MODEL BASED SELF-POSITIONING PATIENT TABLE FOR X-RAY SYSTEMS 审中-公开
标题翻译：基于模型的X射线系统自定位患者表
公开(公告)号：US20110002444A1
公开(公告)日：2011-01-06
申请号：US12920333
申请日：2009-03-09
申请人： Holger Schmitt , Udo Van Stevendaal , Peter Forthmann , Michael Grass
发明人： Holger Schmitt , Udo Van Stevendaal , Peter Forthmann , Michael Grass
IPC分类号： A61B6/04 , G01N23/04
CPC分类号： A61B6/0457 , A61B6/4441 , A61B6/465 , A61B6/469 , A61B6/488 , A61B6/547
摘要： A System (24) for positioning a carrier (9) of an object (10) within a field of view of an imaging unit (7b), the system comprising: an imaging receiving interface unit (14) for receiving image data (22) representing an image (9) of the object (10) from an imaging unit (7b), an object components position determination unit (15) for determining object components (11, 12) position data (25) representing positions of components (11, 12) of the object (10), a memory (16) with anatomic model data stored therein, the anatomic model data representing anatomic model (9*) component positions of anatomic model components (11*, 12*) of an atomic model (10*), a matching unit (17) designed to match object components (11, 12) positions and anatomic model components (11*, 12*) positions based on object components position data and anatomic model data, an input receiving unit (19) for receiving input data (23) representing a selected component (11) of interest, a positioning planning unit (18) for determining position shift data representing a direction and a distance by which the carrier (8) is to be shifted, considering the input data, anatomic model data and object components position data, an interface (20) to a positioning system (21) for shifting the carrier (8) based on the position shift data (27).
摘要翻译：一种用于将物体（10）的载体（9）定位在成像单元（7b）的视野内的系统（24），所述系统包括：用于接收图像数据（22）的成像接收接口单元（14）从成像单元（7b）表示对象（10）的图像（9）;对象分量位置确定单元（15），用于确定表示分量（11,12）的位置的对象分量（11,12）（10）的存储器（16），存储有解剖模型数据的存储器（16），所述解剖模型数据表示原子模型的解剖模型组件（11 *，12 *）的解剖模型（9 *）组件位置 10 *），匹配单元（17），其被设计为基于对象分量位置数据和解剖模型数据来匹配对象分量（11,12）位置和解剖模型分量（11 *，12 *）位置;输入接收单元），用于接收表示所选择的所选择的组件（11）的输入数据（23）;定位计划单元（18）考虑到输入数据，解剖模型数据和对象分量位置数据，表示载体（8）要移动的方向和距离的位置移位数据，到定位系统（21）的接口（20），用于移位载体（8）基于位置偏移数据（27）。

6. 发明授权

US08442184B2 Spectral CT 有权
标题翻译：光谱CT
公开(公告)号：US08442184B2
公开(公告)日：2013-05-14
申请号：US12996985
申请日：2009-06-01
申请人： Peter Forthmann , Udo Van Stevendaal , Ewald Roessl , Michael Grass , Roland Proksa , Jens-Peter Schlomka
发明人： Peter Forthmann , Udo Van Stevendaal , Ewald Roessl , Michael Grass , Roland Proksa , Jens-Peter Schlomka
IPC分类号： A61B6/00
CPC分类号： A61B6/405 , A61B6/032 , A61B6/4014 , A61B6/4035 , A61B6/4042 , A61B6/4241 , A61B6/482
摘要： An imaging system includes a radiation source (106, T1, T2, T3) that rotates about an examination region and emits radiation that traverses the examination region. The radiation source (106, T1, T2, T3) emits radiation having an energy spectrum that is selectively alternately switched between at least two different energy spectra during an imaging procedure. The system further includes an energy-resolving detector array (116, D1, D2, D3) that detects radiation traversing the examination region. The energy-resolving detector array (116, D1, D2, D3) resolves the detected radiation over at least two different energy ranges and produces energy-resolved output signals as a function of both emission energy spectrum and energy range. The system further includes a reconstructor (126) that performs a spectral reconstruction of the energy-resolved output signals. In another embodiment, the detector array (116) includes a photon-counting detector array (116).
摘要翻译：成像系统包括围绕检查区域旋转并且发射穿过检查区域的辐射的辐射源（106，T1，T2，T3）。辐射源（106，T1，T2，T3）发射具有在成像过程期间在至少两个不同能量谱之间选择性交替切换的能谱的辐射。该系统还包括检测穿过检查区域的辐射的能量分辨检测器阵列（116，D1，D2，D3）。能量分辨检测器阵列（116，D1，D2，D3）通过至少两个不同的能量范围来解析检测到的辐射，并且产生作为发射能量谱和能量范围的函数的能量分辨的输出信号。该系统还包括执行能量分辨输出信号的频谱重建的重建器（126）。在另一个实施例中，检测器阵列（116）包括光子计数检测器阵列（116）。

7. 发明授权

US08135197B2 Automatic adaptive soft tissue thresholding for two-pass CT cone-beam artifact reduction 有权
标题翻译：自动适应性软组织阈值二次CT锥束伪影减少
公开(公告)号：US08135197B2
公开(公告)日：2012-03-13
申请号：US12090654
申请日：2006-10-06
申请人： Peter Forthmann , Michael Grass , Roland Proksa
发明人： Peter Forthmann , Michael Grass , Roland Proksa
IPC分类号： A61B6/03
CPC分类号： G06T11/008 , Y10S378/901
摘要： Since the soft tissue levels in an image usually comprise a variety of values between air and bone boundaries, it may not be obvious a priori what threshold value applies. According to an exemplary embodiment of the present invention, an examination apparatus is provided which is adapted for determining the optimal weight for subtraction of a soft tissue correction image without performing a multitude of forward and backward projections. This may be provided determining a roughness function based on a plurality of subtractions of the soft tissue streak image, each subtraction corresponding to a different weighting of the streak image.
摘要翻译：由于图像中的软组织水平通常包含空气和骨骼边界之间的各种值，所以事先显示出什么阈值可能并不明显。根据本发明的示例性实施例，提供一种检查装置，其适于确定用于减去软组织校正图像的最佳权重，而不执行大量向前和向后的投影。可以提供这样来确定基于软组织条纹图像的多个减法的粗糙度函数，每个减法对应于条纹图像的不同加权。

8. 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。

9. 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。

10. 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。

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