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1.发明授权Method and apparatus for efficient calculation and use of reconstructed pixel variance in tomography images 有权用于有效计算和使用断层图像中的重建像素方差的方法和装置公开(公告)号：US08111889B2
公开(公告)日：2012-02-07
申请号：US10813758
申请日：2004-03-31
申请人： Samit Kumar Basu , Bruno Kristiaan Bernard De Man , Peter Michael Edic , Ricardo Scott Avila , James Vradenburg Miller , Colin Craig McCulloch , Deborah Joy Walter , Paulo Ricardo dos Santos Mendonca , William Macomber Leue , Thomas Baby Sebastian
发明人： Samit Kumar Basu , Bruno Kristiaan Bernard De Man , Peter Michael Edic , Ricardo Scott Avila , James Vradenburg Miller , Colin Craig McCulloch , Deborah Joy Walter , Paulo Ricardo dos Santos Mendonca , William Macomber Leue , Thomas Baby Sebastian
IPC分类号： G06K9/00
CPC分类号： G06T11/005 , G06T2211/421
摘要： A technique is disclosed for generating variance data and a variance map from measured projection data acquired from a tomography system. The method comprises accessing the measured projection data from the tomography system. The method further comprises generating the variance map from the measured projection data and displaying, analyzing or processing the variance map. The variance data is determined based upon a statistical model from measured image data, and may be used for image analysis, data acquisition, in computer aided diagnosis routines, and so forth.
摘要翻译： 公开了用于从断层摄影系统获取的测量投影数据产生方差数据和方差图的技术。 该方法包括从断层摄影系统访问所测量的投影数据。 该方法还包括从所测量的投影数据生成方差图并显示，分析或处理方差图。 方差数据基于来自测量图像数据的统计模型确定，并且可以用于图像分析，数据采集，计算机辅助诊断例程等。
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2.发明授权Method for energy sensitive computed tomography using checkerboard filtering 有权使用棋盘过滤的能量敏感计算机断层扫描方法公开(公告)号：US08111803B2
公开(公告)日：2012-02-07
申请号：US12432225
申请日：2009-04-29
IPC分类号： G01N23/087 , G21K5/10 , H05G1/64
CPC分类号： G21K1/10 , A61B6/032 , A61B6/4035 , A61B6/482 , G01N2223/419 , G01N2223/423
摘要： Methods for energy-sensitive computed tomography systems that use checkerboard filtering. A method of enhancing image analysis of projection data acquired using a detector configured with a checkerboard filter includes disposing in a system a detector to receive a transmitted beam of X-rays traversing through an object, where the system is configured so the detector receives both high- and one of total- and low-energy projection data; receiving the high- and one of total- and low-energy projection data at the detector; and then estimating an effective atomic number of the object and/or processing the projection data so as to mitigate reconstruction artifacts. The present invention has been described in terms of specific embodiment(s), and it is recognized that equivalents, alternatives, and modifications, aside from those expressly stated, are possible and within the scope of the appended claims.
摘要翻译： 使用棋盘过滤的能量敏感计算机断层摄影系统的方法。 使用配置有棋盘滤波器的检测器获取的投影数据的图像分析增强方法包括在系统中设置检测器以接收穿过物体的X射线的透射束，其中系统配置为使得检测器接收高 - 和总能量和低能量投影数据之一; 在检测器处接收高能量投影数据和低能量投影数据之一; 然后估计对象的有效原子数和/或处理投影数据，以便减轻重建伪像。 已经根据具体实施例描述了本发明，并且认识到除了明确说明的那些之外的等同物，替代物和修改是可能的并且在所附权利要求的范围内。
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3.发明申请公开(公告)号：US20080247504A1
公开(公告)日：2008-10-09
申请号：US11954295
申请日：2007-12-12
IPC分类号： A61B6/00
CPC分类号： A61B6/405 , A61B6/027 , A61B6/032 , A61B6/4021 , A61B6/4028 , A61B6/4035 , A61B6/4085 , A61B6/4233 , A61B6/482 , G01T1/295 , G01T1/2985 , G01V5/0041 , G01V5/005 , H01J35/14 , H01J35/30
摘要： A CT system includes a rotatable gantry having an opening for receiving an object to be scanned, at least one x-ray source coupled to the gantry and configured to project x-rays toward the object, a detector coupled to the gantry and having a scintillator therein and configured to receive x-rays that pass through the object, and a generator configured to energize the at least one x-ray source. The system includes a controller configured to energize the generator to project a first beam of x-rays toward the object from a first focal spot position of an anode, the first beam of x-rays having a ray traversing a path through the object, acquire imaging data from the first beam of x-rays, position the at least one x-ray source such that a second beam of x-rays projected from a second focal spot position of the anode has a ray directed to traverse the path through the object, the second anode focal spot position different than the first anode focal spot position, energize the generator to project the second beam of x-rays toward the object, and acquire imaging data from the second beam of x-rays.
摘要翻译： CT系统包括具有用于接收待扫描物体的开口的可旋转台架，耦合到台架并被配置为向物体投射X射线的至少一个x射线源，耦合到台架并具有闪烁体 并且被配置为接收穿过物体的x射线，以及被配置为激励至少一个x射线源的发生器。 该系统包括控制器，该控制器被配置为对发生器进行激励，以从阳极的第一焦斑位置朝向物体投射第一射线束，第一射线X射线具有穿过物体的路径的光线 从X射线的第一束成像数据，定位至少一个x射线源，使得从阳极的第二焦点位置投影的第二射线束具有指向穿过物体的路径的射线 第二阳极焦点位置不同于第一阳极焦斑位置，激励发生器将第二射线束朝向物体投射，并从第二射线束获取成像数据。
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4.发明申请Acquisition and reconstruction of projection data using a stationary CT geometry 有权使用固定CT几何获取和重建投影数据公开(公告)号：US20080056437A1
公开(公告)日：2008-03-06
申请号：US11725892
申请日：2007-03-20
IPC分类号： G01N23/00
CPC分类号： G01T1/2985 , A61B6/027
摘要： Systems and methods are provided for acquiring and reconstructing projection data using a computed tomography (CT) system having stationary distributed X-ray sources and detector arrays. In one embodiment, a non-sequential activation of X-ray source locations on an annular source is employed to acquire projection data. In another embodiment, a distributed source is tilted relative to an axis of the scanner to acquire the projection data. In a further embodiment, a plurality of X-ray source locations on an annular source are activated such that the aggregated signals correspond to two or more sets of spatially interleaved helical scan data.
摘要翻译： 提供了使用具有固定分布式X射线源和检测器阵列的计算机断层摄影（CT）系统来获取和重建投影数据的系统和方法。 在一个实施例中，使用在环形源上的X射线源位置的非顺序激活来获取投影数据。 在另一个实施例中，分布式源相对于扫描器的轴线倾斜以获取投影数据。 在另一实施例中，环形源上的多个X射线源位置被激活，使得聚集的信号对应于两组或多组空间交错的螺旋扫描数据。
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5.发明申请Acquisition and reconstruction of projection data using a stationary CT geometry 有权使用固定CT几何获取和重建投影数据公开(公告)号：US20080056435A1
公开(公告)日：2008-03-06
申请号：US11726023
申请日：2007-03-20
申请人： Samit Kumar Basu , Bruno De Man , Jed Douglas Pack , Xiaoye Wu , Zhye Yin , Peter Michael Edic
发明人： Samit Kumar Basu , Bruno De Man , Jed Douglas Pack , Xiaoye Wu , Zhye Yin , Peter Michael Edic
IPC分类号： G01N23/00
CPC分类号： G01T1/2985 , A61B6/027
摘要： Systems and methods are provided for acquiring and reconstructing projection data that is mathematically complete or sufficient using a computed tomography (CT) system having stationary distributed X-ray sources and detector arrays. In one embodiment, a distributed source is provided as arcuate segments offset in the X-Y plane and along the Z-axis.
摘要翻译： 提供了系统和方法，用于使用具有固定分布式X射线源和检测器阵列的计算机断层摄影（CT）系统来获取和重建数学上完整或足够的投影数据。 在一个实施例中，分布式源被提供为在X-Y平面和Z轴上偏移的弧形段。
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公开(公告)号：US07082180B2
公开(公告)日：2006-07-25
申请号：US10724461
申请日：2003-11-26
IPC分类号： A61B6/00
CPC分类号： A61B6/507 , A61B6/032 , A61B6/481 , A61B6/488 , A61B6/5217 , Y10S378/901
摘要： A method for computing volumetric perfusion in a spatially stationary organ using a computed tomography (CT) imaging system includes positioning an area detector such that the area detector encompasses a spatially stationary organ within the field of view of the imaging system for all view angles, operating the CT imaging system in a cine mode to acquire a plurality of projection data representative of the tissue dynamics in the spatially stationary organ, processing the projection data, temporally filtering respective signals from volume elements of the reconstructions of the projection data which are representative of the tissue dynamics and computing the volumetric perfusion in the organ using the temporally filtered signals from volume elements.
摘要翻译： 使用计算机断层摄影（CT）成像系统计算空间静止器官中的体积灌注的方法包括定位区域检测器，使得区域检测器在成像系统的视野范围内包含用于所有视角的空间静止器官，操作 CT成像系统以电影模式获取表示空间静止器官中的组织动力学的多个投影数据，处理投影数据，对代表投影数据的投影数据的重建的体积元素的各个信号进行时间滤波 组织动力学和使用来自体积元素的时间滤波信号计算器官中的体积灌注。
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7.发明授权公开(公告)号：US07852979B2
公开(公告)日：2010-12-14
申请号：US11954295
申请日：2007-12-12
CPC分类号： A61B6/405 , A61B6/027 , A61B6/032 , A61B6/4021 , A61B6/4028 , A61B6/4035 , A61B6/4085 , A61B6/4233 , A61B6/482 , G01T1/295 , G01T1/2985 , G01V5/0041 , G01V5/005 , H01J35/14 , H01J35/30
摘要： A CT system includes a rotatable gantry having an opening for receiving an object to be scanned, at least one x-ray source coupled to the gantry and configured to project x-rays toward the object, a detector coupled to the gantry and having a scintillator therein and configured to receive x-rays that pass through the object, and a generator configured to energize the at least one x-ray source. The system includes a controller configured to energize the generator to project a first beam of x-rays toward the object from a first focal spot position of an anode, the first beam of x-rays having a ray traversing a path through the object, acquire imaging data from the first beam of x-rays, position the at least one x-ray source such that a second beam of x-rays projected from a second focal spot position of the anode has a ray directed to traverse the path through the object, the second anode focal spot position different than the first anode focal spot position, energize the generator to project the second beam of x-rays toward the object, and acquire imaging data from the second beam of x-rays.
摘要翻译： CT系统包括具有用于接收待扫描物体的开口的可旋转台架，耦合到台架并被配置为向物体投射X射线的至少一个x射线源，耦合到台架并具有闪烁体 并且被配置为接收穿过物体的x射线，以及被配置为激励至少一个x射线源的发生器。 该系统包括控制器，该控制器被配置为对发生器进行激励，以从阳极的第一焦斑位置朝向物体投射第一射线束，第一射线X射线具有穿过物体的路径的光线 从X射线的第一束成像数据，定位至少一个x射线源，使得从阳极的第二焦点位置投影的第二射线束具有指向穿过物体的路径的射线 第二阳极焦点位置不同于第一阳极焦斑位置，激励发生器将第二射线束朝向物体投射，并从第二射线束获取成像数据。
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8.发明授权Acquisition and reconstruction of projection data using a stationary CT geometry 有权使用固定CT几何获取和重建投影数据公开(公告)号：US07706499B2
公开(公告)日：2010-04-27
申请号：US11725892
申请日：2007-03-20
IPC分类号： H05G1/60
CPC分类号： G01T1/2985 , A61B6/027
摘要： Systems and methods are provided for acquiring and reconstructing projection data using a computed tomography (CT) system having stationary distributed X-ray sources and detector arrays. In one embodiment, a non-sequential activation of X-ray source locations on an annular source is employed to acquire projection data. In another embodiment, a distributed source is tilted relative to an axis of the scanner to acquire the projection data. In a further embodiment, a plurality of X-ray source locations on an annular source are activated such that the aggregated signals correspond to two or more sets of spatially interleaved helical scan data.
摘要翻译： 提供了使用具有固定分布式X射线源和检测器阵列的计算机断层摄影（CT）系统来获取和重建投影数据的系统和方法。 在一个实施例中，使用在环形源上的X射线源位置的非顺序激活来获取投影数据。 在另一个实施例中，分布式源相对于扫描器的轴线倾斜以获取投影数据。 在另一实施例中，环形源上的多个X射线源位置被激活，使得聚集的信号对应于两组或多组空间交错的螺旋扫描数据。
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公开(公告)号：US07396162B1
公开(公告)日：2008-07-08
申请号：US11731357
申请日：2007-03-30
IPC分类号： G01D18/00
CPC分类号： A61B6/5282 , A61B6/4291 , G01T1/1647 , G01T1/2985
摘要： A method, system, and machine readable media are provided for correcting scatter in an image. The method comprises sequentially emitting radiation from a subset of radiation sources toward a detector array and measuring radiation on areas of the detector array not exposed to the emitted primary radiation at the time of measurement. Scatter is estimated from the measured radiation. Furthermore, the scatter estimates are subtracted from the measured data and images with improved image quality are reconstructed.
摘要翻译： 提供了一种用于校正图像中的散射的方法，系统和机器可读介质。 该方法包括从辐射源的子集向检测器阵列顺序地发射辐射，并且在测量时测量不暴露于所发射的主辐射的检测器阵列的区域上的辐射。 从测量的辐射估计散射。 此外，从测量数据中减去散射估计值，并重建具有改善图像质量的图像。
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公开(公告)号：US07376255B2
公开(公告)日：2008-05-20
申请号：US10874976
申请日：2004-06-23
CPC分类号： G06T11/005 , G06T2211/416 , G06T2211/421 , Y10S378/901
摘要： A method for reconstructing image data acquired by a computed tomography system is provided. The method comprises selecting a portion of image data to be reconstructed and determining a corresponding portion of projection data. An adaptive filter is computed and applied to the portion of projection data to generate a portion of adaptively-filtered projection data. The adaptive filter is computed based upon desired quality properties of the portion of image data. Finally, the portion of image data is reconstructed based upon the portion of adaptively-filtered projection data. The step of selecting, computing and reconstructing is repeated for every pixel or group of pixels comprising the image data.
摘要翻译： 提供了一种重建由计算机断层摄影系统获取的图像数据的方法。 该方法包括选择要重建的图像数据的一部分并确定投影数据的对应部分。 计算自适应滤波器并将其应用于投影数据的一部分以生成自适应滤波投影数据的一部分。 基于图像数据部分的期望质量特性来计算自适应滤波器。 最后，基于自适应滤波投影数据的部分重建图像数据的部分。 对于包括图像数据的每个像素或像素组重复选择，计算和重建的步骤。
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