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1. 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）。

2. 发明申请

US20110096892A1 SPECTRAL CT 有权
标题翻译：光谱CT
公开(公告)号：US20110096892A1
公开(公告)日：2011-04-28
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： H05G1/60
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）。

3. 发明申请

US20080317311A1 Coherent Scatter Imaging 审中-公开
标题翻译：相干散射成像
公开(公告)号：US20080317311A1
公开(公告)日：2008-12-25
申请号：US11574742
申请日：2005-09-09
申请人： Michael Grass , Jens-Peter Schlomka , Udo Van Stevendaal
发明人： Michael Grass , Jens-Peter Schlomka , Udo Van Stevendaal
IPC分类号： G06K9/00
CPC分类号： G01V5/0025 , G01T1/1644
摘要： A region of interest is identified using a conventional CT or X-ray approach. Then, the region of interest is scanned using a plurality of pencil beams (28) to obtain a plurality of different scattered X-ray spectra. A geometric correction is then applied to each spectrum as if the spectrum was solely due to features in the region of interest. The various spectra recorded using the beams are combined and correlated to determine features of the region of interest (32) whilst minimising the effect of features in the rest of the sample (30).
摘要翻译：使用常规CT或X射线方法识别感兴趣区域。然后，使用多个笔形光束（28）扫描感兴趣区域，以获得多个不同的散射X射线光谱。然后将几何校正应用于每个频谱，好像光谱完全是由于感兴趣区域中的特征。使用光束记录的各种光谱被组合并相关，以确定感兴趣区域（32）的特征，同时最小化样本（30）的其余部分中的特征的影响。

4. 发明申请

US20070253532A1 Coherent Scatter Imaging 审中-公开
标题翻译：相干散射成像
公开(公告)号：US20070253532A1
公开(公告)日：2007-11-01
申请号：US11574741
申请日：2005-09-09
申请人： Udo Van Stevendaal , Jens-Peter Schlomka , Michael Grass
发明人： Udo Van Stevendaal , Jens-Peter Schlomka , Michael Grass
IPC分类号： G01N23/201
CPC分类号： G01T1/1644 , A61B6/03 , A61B6/483 , G01V5/0025
摘要： A CSI system is described that uses pencil beams 40,42,44,46 through a sample 30 having a region of interest 32. Each coherent scatter spectrum of sample beams 40, 44 through the region of interest is subtracted by the spectra using respective reference beams 42, 46. The measurements are combined to determine features of the region of interest 32 whilst minimising the effect of features in the rest of the sample 30.
摘要翻译：描述了CSI系统，其通过具有感兴趣区域32的样本30使用笔束40,42,44,46。通过使用相应参考的频谱将样本波束40,44通过感兴趣区域的每个相干散射光谱减去光束42,46。将测量结合以确定感兴趣区域32的特征，同时最小化样本30的其余部分中的特征的影响。

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

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。

7. 发明申请

US20080292157A1 Automatic Adaptive Soft Tissue Thresholding for Two-Pass Ct Cone-Beam Artifact Reduction 有权
标题翻译：自动自适应软组织阈值双通道锥形人造丝减少
公开(公告)号：US20080292157A1
公开(公告)日：2008-11-27
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： G06K9/00 , G06K9/40
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

US08437524B2 Imaging system for imaging a region of interest in different phases 有权
标题翻译：用于在不同阶段成像感兴趣区域的成像系统
公开(公告)号：US08437524B2
公开(公告)日：2013-05-07
申请号：US12521899
申请日：2008-01-02
申请人： Claas Bontus , Michael Grass , Carsten Oliver Schirra , Udo Van Stevendaal , Guy Lavi
发明人： Claas Bontus , Michael Grass , Carsten Oliver Schirra , Udo Van Stevendaal , Guy Lavi
IPC分类号： G06K9/00
CPC分类号： G06T7/20 , A61B5/0402 , A61B6/027 , A61B6/032 , A61B6/469 , A61B6/503 , A61B6/504 , A61B6/541
摘要： The invention relates to an imaging system for imaging a region of interest comprising a moving object, which moves less in small motion phases than in large motion phases. Detection values are provided and a small motion determination unit (15) determines the motion of the object in the region of interest in the small motion phases from the 5 detection values. A large motion determination unit (16) determines the motion of the object in the large motion phases from the determined motion of the object in the small motion phases. A reconstruction unit (17) reconstructs an image of the region of interest from the detection values, wherein the reconstruction unit (17) is adapted for performing a motion compensation using the determined motions in the small and large motion phases.
摘要翻译：本发明涉及一种用于对感兴趣的区域成像的成像系统，该成像系统包括移动物体，该运动物体在小运动相位上比在大运动相位中运动较少。提供检测值，并且小运动确定单元（15）从5个检测值确定在小运动相位中的感兴趣区域中的对象的运动。大运动确定单元（16）根据所确定的小运动阶段中的物体的运动来确定物体在大运动相位中的运动。重建单元（17）从检测值重建感兴趣区域的图像，其中重建单元（17）适于使用在小的和大的运动阶段中确定的运动来执行运动补偿。

9. 发明申请

US20090310825A1 IMAGING SYSTEM FOR IMAGING A REGION OF INTEREST COMPRISING A MOVING OBJECT 有权
标题翻译：用于成像包含运动对象的兴趣区域的成像系统
公开(公告)号：US20090310825A1
公开(公告)日：2009-12-17
申请号：US12521899
申请日：2008-01-02
申请人： Claas Bontus , Michael Grass , Carsten Oliver Schirra , Udo Van Stevendaal , Guy Lavi
发明人： Claas Bontus , Michael Grass , Carsten Oliver Schirra , Udo Van Stevendaal , Guy Lavi
IPC分类号： G06K9/00
CPC分类号： G06T7/20 , A61B5/0402 , A61B6/027 , A61B6/032 , A61B6/469 , A61B6/503 , A61B6/504 , A61B6/541
摘要： The invention relates to an imaging system for imaging a region of interest comprising a moving object, which moves less in small motion phases than in large motion phases. Detection values are provided and a small motion determination unit (15) determines the motion of the object in the region of interest in the small motion phases from the 5 detection values. A large motion determination unit (16) determines the motion of the object in the large motion phases from the determined motion of the object in the small motion phases. A reconstruction unit (17) reconstructs an image of the region of interest from the detection values, wherein the reconstruction unit (17) is adapted for performing a motion compensation using the determined motions in the small and large motion phases.
摘要翻译：本发明涉及一种用于对感兴趣的区域成像的成像系统，该成像系统包括移动物体，该运动物体在小运动相位上比在大运动相位中运动较少。提供检测值，并且小运动确定单元（15）从5个检测值确定在小运动相位中的感兴趣区域中的对象的运动。大运动确定单元（16）根据所确定的小运动阶段中的物体的运动来确定物体在大运动相位中的运动。重建单元（17）从检测值重建感兴趣区域的图像，其中重建单元（17）适于使用在小的和大的运动阶段中确定的运动来执行运动补偿。

10. 发明授权

US08184883B2 Motion compensated CT reconstruction of high contrast objects 有权
标题翻译：高对比度物体运动补偿CT重建
公开(公告)号：US08184883B2
公开(公告)日：2012-05-22
申请号：US12093458
申请日：2006-11-14
申请人： Michael Grass , Dirk Schaefer , Udo Van Stevendaal
发明人： Michael Grass , Dirk Schaefer , Udo Van Stevendaal
IPC分类号： G06K9/00 , A61B6/03
CPC分类号： A61B6/032 , A61B6/027 , A61B6/12 , A61B6/541 , G06T7/20 , G06T11/006 , G06T2207/10081 , G06T2207/30048 , G06T2211/412
摘要： Cardiac CT imaging using gated reconstruction is currently limited in its temporal and spatial resolution. According to an exemplary embodiment of the present invention, an examination apparatus is provided in which an identification of a high contrast object is performed. This high contrast object is then followed through the phases, resulting in a motion vector field of the high contrast object, on the basis of which a motion compensated reconstruction is then performed.
摘要翻译：使用门控重建的心脏CT成像目前在其时间和空间分辨率方面受到限制。根据本发明的示例性实施例，提供一种检查装置，其中执行高对比度对象的识别。然后，该对比度较高的对象随后进入相位，导致高对比度对象的运动矢量场，然后基于此进行运动补偿重建。

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