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公开(公告)号：US07672424B2
公开(公告)日：2010-03-02
申请号：US11575902
申请日：2005-09-22
IPC分类号： A61B6/00
CPC分类号： G06T11/006
摘要： A radiographic imaging apparatus includes a radiation detector (16) and a radiation source (12) which projects a non-parallel beam of radiation into field of view (14). A footprint of each voxel (v) which is projected on the detector (16) is corrected based on the position of the voxel (v) in the field of view (14) in relation to the radiation detector (16) and the radiation source (12). The contributions from substantially parallel redundant projections are further combined based on a fractional distance frac from a center point (82) of the voxel (v) to a center of each of the adjacent redundant projections.
摘要翻译： 放射线照相成像装置包括辐射检测器（16）和辐射源（12），其将非平行辐射束投射到视场（14）中。 基于在视场（14）中相对于放射线检测器（16）的体素（v）的位置和辐射源（v）来校正投影在检测器（16）上的每个体素（v）的足迹 （12）。 基于从体素（v）的中心点（82）到每个相邻冗余投影的中心的分数距离压裂进一步组合基本上平行的冗余投影的贡献。
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公开(公告)号：US20090202036A1
公开(公告)日：2009-08-13
申请号：US11575902
申请日：2005-09-22
CPC分类号： G06T11/006
摘要： A radiographic imaging apparatus includes a radiation detector (16) and a radiation source (12) which projects a non-parallel beam of radiation into field of view (14). A footprint of each voxel (v) which is projected on the detector (16) is corrected based on the position of the voxel (v) in the field of view (14) in relation to the radiation detector (16) and the radiation source (12). The contributions from substantially parallel redundant projections are further combined based on a fractional distance frac from a center point (82) of the voxel (v) to a center of each of the adjacent redundant projections.
摘要翻译： 放射线照相成像装置包括辐射检测器（16）和辐射源（12），其将非平行辐射束投射到视场（14）中。 基于在视场（14）中相对于放射线检测器（16）的体素（v）的位置和辐射源（v）来校正投影在检测器（16）上的每个体素（v）的足迹 （12）。 基于从体素（v）的中心点（82）到每个相邻冗余投影的中心的分数距离压裂进一步组合基本上平行的冗余投影的贡献。
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公开(公告)号：US07570731B2
公开(公告)日：2009-08-04
申请号：US11570896
申请日：2005-06-24
申请人： Tim Nielsen , Andy Ziegler , Thomas Koehler , Roland Proksa
发明人： Tim Nielsen , Andy Ziegler , Thomas Koehler , Roland Proksa
IPC分类号： A61B6/03
CPC分类号： G06T11/006 , A61B6/027 , G06T2211/421 , Y10S378/901
摘要： The invention relates to an imaging method, especially a computerized tomography method, with which an object is penetrated by rays from different directions and measured values, which depend upon the intensity of the rays after penetrating the object, are acquired by a detector unit. From these measured values, an object image is reconstructed by means of back projection of measured-value-dependent back projection values. Therein, the object image is divided into overlapping, quasi-spherically symmetric image segments, each being defined by an image value and a quasi-spherically symmetric base function. Furthermore, during the back projection, the back projection values are added in proportions to the image values, wherein the proportion of a back projection value, which is added during the back projection to an image value, is dependent on a proportionality factor, which is equal to the average value of the line integrals of the base function belonging to the respective image value along those rays that have generated the measured value, on which the respective back projection value is dependent.
摘要翻译： 本发明涉及一种成像方法，特别是计算机断层摄影方法，其中物体被来自不同方向的光线穿透，并且测量值取决于穿透物体之后的光线的强度，由检测器单元获取。 从这些测量值，通过背投影测量值依赖的反投影值重建对象图像。 其中，对象图像被划分为重叠的准球形对称图像片段，每个片段由图像值和准球形对称的基本功能定义。 此外，在背投影期间，反投影值以与图像值成比例的方式相加，其中在后投影中添加的反投影值与图像值的比例取决于比例因子，即比例因子 等于属于相应图像值的基本功能的线积分的平均值，沿着相应的背投影值依赖于已经产生测量值的那些射线。
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公开(公告)号：US20080273655A1
公开(公告)日：2008-11-06
申请号：US11570896
申请日：2005-06-24
申请人： Tim Nielsen , Andy Ziegler , Thomas Koehler , Roland Proksa
发明人： Tim Nielsen , Andy Ziegler , Thomas Koehler , Roland Proksa
CPC分类号： G06T11/006 , A61B6/027 , G06T2211/421 , Y10S378/901
摘要： The invention relates to an imaging method, especially a computerized tomography method, with which an object is penetrated by rays from different directions and measured values, which depend upon the intensity of the rays after penetrating the object, are acquired by a detector unit. From these measured values, an object image is reconstructed by means of back projection of measured-value-dependent back projection values. Therein, the object image is divided into overlapping, quasi-spherically symmetric image segments, each being defined by an image value and a quasi-spherically symmetric base function. Furthermore, during the back projection, the back projection values are added in proportions to the image values, wherein the proportion of a back projection value, which is added during the back projection to an image value, is dependent on a proportionality factor, which is equal to the average value of the line integrals of the base function belonging to the respective image value along those rays that have generated the measured value, on which the respective back projection value is dependent.
摘要翻译： 本发明涉及一种成像方法，特别是计算机断层摄影方法，其中物体被来自不同方向的光线穿透，并且测量值取决于穿透物体之后的光线的强度，由检测器单元获取。 从这些测量值，通过背投影测量值依赖的反投影值重建对象图像。 其中，对象图像被划分为重叠的准球形对称图像片段，每个片段由图像值和准球形对称的基本功能定义。 此外，在背投影期间，反投影值以与图像值成比例的方式相加，其中在后投影中添加的反投影值与图像值的比例取决于比例因子，即比例因子 等于属于相应图像值的基本功能的线积分的平均值，沿着相应的背投影值依赖于已经产生测量值的那些射线。
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公开(公告)号：US07970195B2
公开(公告)日：2011-06-28
申请号：US11908294
申请日：2006-03-07
申请人： Andy Ziegler , Thomas Koehler , Roland Proksa
发明人： Andy Ziegler , Thomas Koehler , Roland Proksa
IPC分类号： G06K9/00
CPC分类号： G06T11/006 , G06T2211/424
摘要： The invention relates to a device and a method for the iterative reconstruction of the attenuation coefficients μj in a tomographic image of an object (1) from projection measurements mi. In the update equation for μjn during the n-th iteration the backprojected error (mi−mi−(μjn)) is weighted by a voxel dependent factor Formula (I). Such a voxel dependent update may particularly be included in the algorithms of ART or ML.
摘要翻译： 本发明涉及一种用于从投影测量mi在物体（1）的断层图像中迭代重建衰减系数μj的装置和方法。 在第n次迭代期间的μjn的更新方程中，反投影误差（mi-mi-（μjn））由体素因子因子公式（I）加权。 这种体素相关更新可以特别地包括在ART或ML的算法中。
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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。
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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
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。
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公开(公告)号：US08000434B2
公开(公告)日：2011-08-16
申请号：US12373112
申请日：2007-07-02
申请人： Andy Ziegler , Roland Proksa
发明人： Andy Ziegler , Roland Proksa
IPC分类号： A61B6/00
CPC分类号： G01T1/2985
摘要： A computed tomography system includes an x-ray source (108) that rotates about and emits radiation through an imaging region (116). At least one finite energy resolution detector (112) detects the emitted radiation. The at least one finite resolution detector (112) includes a plurality of sub-detectors (204). Each of the plurality of sub-detectors (204) is associated with one or more different energy thresholds. Each of the energy thresholds is used to count a number of incident photons based on a corresponding energy level. A reconstruction system (136) reconstructs the photon counts to generate one or more images of a subject residing within the imaging region (116).
摘要翻译： 计算机断层摄影系统包括绕着成像区域（116）旋转并发射辐射的x射线源（108）。 至少一个有限能量分辨率检测器（112）检测发射的辐射。 所述至少一个有限分辨率检测器（112）包括多个子检测器（204）。 多个子检测器（204）中的每一个与一个或多个不同的能量阈值相关联。 每个能量阈值用于根据相应的能级对一些入射光子进行计数。 重建系统（136）重建光子计数以产生驻留在成像区域（116）内的对象的一个或多个图像。
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公开(公告)号：US20100002830A1
公开(公告)日：2010-01-07
申请号：US12375427
申请日：2007-07-23
申请人： Roland Proksa , Andy Ziegler
发明人： Roland Proksa , Andy Ziegler
CPC分类号： G01T1/2985 , A61B6/027 , A61B6/032 , A61B6/4014 , G01T1/1647
摘要： A computed tomography system includes at least two x-ray sources (108), a at least one common detector (124), and a reconstruction system (136). The at least two x-ray sources (108) are aligned at different z-axis locations at about a same angular position and concurrently emit radiation that traverses an imaging region (116). The at least one detector (124) detects radiation emitted by the at least two x-ray source (108) and generates composite data indicative of the detected radiation. The reconstruction system (136) reconstructs the composite data to generate one or more images.
摘要翻译： 计算机断层摄影系统包括至少两个x射线源（108），至少一个公共检测器（124）和重建系统（136）。 所述至少两个x射线源（108）在大致相同的角位置处在不同的z轴位置对准，并同时发射穿过成像区域（116）的辐射。 所述至少一个检测器（124）检测由所述至少两个X射线源（108）发射的辐射并产生指示检测到的辐射的复合数据。 重建系统（136）重建复合数据以生成一个或多个图像。
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公开(公告)号：US20080205729A1
公开(公告)日：2008-08-28
申请号：US11908294
申请日：2006-03-07
申请人： Andy Ziegler , Thomas Kohler , Roland Proksa
发明人： Andy Ziegler , Thomas Kohler , Roland Proksa
IPC分类号： G06K9/00
CPC分类号： G06T11/006 , G06T2211/424
摘要： The invention relates to a device and a method for the iterative reconstruction of the attenuation coefficients μj in a tomographic image of an object (1) from projection measurements mi. In the update equation for μjn during the n-th iteration the backprojected error (mi−mi−(μjn)) is weighted by a voxel dependent factor Formula (I). Such a voxel dependent update may particularly be included in the algorithms of ART or ML.
摘要翻译： 本发明涉及一种用于从投射测量m 1 i中的对象（1）的断层图像中迭代重建衰减系数μn j i i的装置和方法。 在第n次迭代期间，对于mu n 的更新等式，反向投影的误差（m i） 通过体素依赖因子公式（I）加权 - （mu＆lt; j＆lt; n＆gt; n＆gt;））。 这种体素相关更新可以特别地包括在ART或ML的算法中。
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