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21. 发明申请

US20110052022A1 SYSTEM AND METHOD OF DATA INTERPOLATION IN FAST KVP SWITCHING DUAL ENERGY CT 有权
标题翻译：快速KVP切换双能量CT数据插值系统与方法
公开(公告)号：US20110052022A1
公开(公告)日：2011-03-03
申请号：US12547117
申请日：2009-08-25
申请人： Dan Xu , David Allen Langan , Xiaoye Wu
发明人： Dan Xu , David Allen Langan , Xiaoye Wu
IPC分类号： G06K9/00 , G01N23/00
CPC分类号： G01N23/046 , A61B6/027 , G01N2223/419 , G01N2223/612 , G06T11/005 , G06T2211/408
摘要： A CT system includes a rotatable gantry having an opening for receiving an object to be scanned, an x-ray source coupled to the gantry and configured to project x-rays through the opening, a generator configured to energize the x-ray source to a first kVp and to a second kVp to generate the x-rays, and a detector having pixels therein, the detector attached to the gantry and positioned to receive the x-rays. The system includes a computer programmed to acquire a first view dataset and a second view dataset with the x-ray source energized to the first kVp, interpolate the first and second view datasets to generate interpolated pixels in an interpolated view dataset at the first kVp, using at least two pixels from each of the first and second view datasets to generate each interpolated pixel in the interpolated view dataset, and generate an image of the object using the interpolated view dataset.
摘要翻译： CT系统包括可旋转机架，其具有用于接收待扫描物体的开口，耦合到台架的X射线源，并且被配置成将X射线投射穿过开口;发生器，被配置为将x射线源激励到第一kVp和第二kVp以产生x射线，以及其中具有像素的检测器，所述检测器附接到台架并定位成接收x射线。该系统包括被编程为获取第一视图数据集的计算机和具有激励到第一kVp的x射线源的第二视图数据集，内插第一和第二视图数据集以在第一kVp的内插视图数据集中生成内插像素，使用来自第一和第二视图数据集中的每一个的至少两个像素来生成内插视图数据集中的每个内插像素，并且使用内插视图数据集生成对象的图像。

22. 发明授权

US07835486B2 Acquisition and reconstruction of projection data using a stationary CT geometry 有权
标题翻译：使用固定CT几何获取和重建投影数据
公开(公告)号：US07835486B2
公开(公告)日：2010-11-16
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： G01N23/083
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。

23. 发明授权

US07792241B2 System and method of fast KVP switching for dual energy CT 有权
标题翻译：双能CT快速KVP开关系统及方法
公开(公告)号：US07792241B2
公开(公告)日：2010-09-07
申请号：US12257658
申请日：2008-10-24
申请人： Xiaoye Wu , David Langan , Colin R. Wilson , Yun Zou
发明人： Xiaoye Wu , David Langan , Colin R. Wilson , Yun Zou
IPC分类号： A61B6/00
CPC分类号： H01J35/06 , H01J35/045 , H01J2235/068
摘要： A CT system includes a rotatable gantry having an opening for receiving an object to be scanned and an x-ray source coupled to the gantry and configured to project x-rays through the opening. The x-ray source includes a target, a first cathode configured to emit a first beam of electrons toward the target, a first gridding electrode coupled to the first cathode, a second cathode configured to emit a second beam of electrons toward the target, and a second gridding electrode coupled to the second cathode. The system includes a generator configured to energize the first cathode to a first kVp and to energize the second cathode to a second kVp, and a detector attached to the gantry and positioned to receive x-rays that pass through the opening. The system also includes a controller configured to apply a gridding voltage to the first gridding electrode to block emission of the first beam of electrons toward the target, apply the gridding voltage to the second gridding electrode to block emission of the second beam of electrons toward the target, and acquire dual energy imaging data from the detector.
摘要翻译： CT系统包括可旋转机架，其具有用于接收待扫描物体的开口和耦合到台架的x射线源，并且被配置成通过开口投影X射线。 x射线源包括目标，被配置为朝向目标发射第一电子束的第一阴极，耦合到第一阴极的第一网格电极，被配置为向靶发射第二电子束的第二阴极，以及耦合到第二阴极的第二栅电极。该系统包括发电机，其被配置为将第一阴极激励到第一kVp并且将第二阴极激励到第二kVp，以及附接到台架并被定位成接收穿过开口的x射线的检测器。该系统还包括：控制器，被配置为向第一格栅电极施加网格化电压，以阻止第一电子束朝向目标的发射，将网格化电压施加到第二格栅电极，以阻止第二电子束朝向目标，并从检测器获取双能量成像数据。

24. 发明授权

US07609802B2 Method and system for reconstructing image volumes from helical scan acquisitions 有权
标题翻译：从螺旋扫描采集重建图像体积的方法和系统
公开(公告)号：US07609802B2
公开(公告)日：2009-10-27
申请号：US11740002
申请日：2007-04-25
申请人： David Allen Langan , Peter Michael Edic , Xiaoye Wu , Jed Douglas Pack
发明人： David Allen Langan , Peter Michael Edic , Xiaoye Wu , Jed Douglas Pack
IPC分类号： A61B6/00
CPC分类号： G06T11/006 , A61B6/027 , G06T2211/421
摘要： A method, computed tomography (CT) system and computer-readable medium for reconstructing an image volume of an object scanned in helical mode. An embodiment of the method includes determining discrete focal lengths within an imaging plane of the reconstructed field of view comprising the image volume; generating a circular scan sinogram(s) for the discrete focal lengths by interpolating the helical views; selecting within a backprojection operation a circular scan sonogram(s), for one or more image points within the imaging plane, over one or more circular views. The method then includes using the selected circular scan sinogram(s), in the backprojection of the image points point(s) over the circular views view(s) and performing a backprojection for all the image points over all the circular views to generate a reconstructed image of the object.
摘要翻译：一种计算机断层摄影（CT）系统和用于重建以螺旋模式扫描的物体的图像体积的计算机可读介质的方法。该方法的实施例包括确定包括图像体积的重建视野的成像平面内的离散焦距; 通过内插螺旋视图来产生用于离散焦距的圆形扫描正弦图; 在反投影操作中，在一个或多个圆形视图上选择用于成像平面内的一个或多个图像点的圆形扫描超声波图。该方法然后包括在圆形视图视图上的图像点点的反投影中使用所选择的圆形扫描正弦图，并对所有圆形视图上的所有图像点执行反投影以产生对象的重建图像。

25. 发明授权

US07606347B2 Photon counting x-ray detector with overrange logic control 有权
标题翻译：光子计数x射线探测器与超量程逻辑控制
公开(公告)号：US07606347B2
公开(公告)日：2009-10-20
申请号：US11744292
申请日：2007-05-04
申请人： John Eric Tkaczyk , Jonathan D. Short , James Wilson Rose , Xiaoye Wu , Samit Kumar Basu
发明人： John Eric Tkaczyk , Jonathan D. Short , James Wilson Rose , Xiaoye Wu , Samit Kumar Basu
IPC分类号： A61B6/03
CPC分类号： A61B6/5205 , A61B6/032 , A61B6/4291 , G01T1/2018 , G01T1/242 , G01T1/243 , G01T1/249
摘要： A CT detector includes a first detector configured to convert radiographic energy to electrical signals representative of energy sensitive radiographic data and a second detector configured to convert radiographic energy to electrical signals representative of energy sensitive radiographic data and positioned to receive x-rays that pass through the first detector. A logic controller is electrically connected to the first detector and the second detector and is configured to receive a logic output signal from the second detector indicative of an amount of a saturation level of the first detector, compare the logic output signal to a threshold value, and output, based on the comparison, electrical signals from the first detector, the second detector, or a combination thereof to an image chain.
摘要翻译： CT检测器包括：第一检测器，其被配置为将射线照相能量转换成表示能量敏感射线照相数据的电信号;以及第二检测器，被配置为将放射线照相能量转换成表示能量敏感射线照相数据的电信号，并被定位成接收穿过第一检测器逻辑控制器电连接到第一检测器和第二检测器，并且被配置为从第二检测器接收指示第一检测器的饱和电平的量的逻辑输出信号，将逻辑输出信号与阈值进行比较，并且基于比较将来自第一检测器，第二检测器或其组合的电信号输出到图像链。

26. 发明授权

US07280631B2 Stationary computed tomography system and method 有权
标题翻译：固定计算机断层扫描系统和方法
公开(公告)号：US07280631B2
公开(公告)日：2007-10-09
申请号：US10816064
申请日：2004-04-01
申请人： Bruno Kristiaan Bernard De Man , Samit Kumar Basu , Peter Michael Edic , Robert Franklin Senzig , William Robert Ross , Xiaoye Wu , Colin Richard Wilson , Mark Ernest Vermilyea , Eugene Lino Saragnese
发明人： Bruno Kristiaan Bernard De Man , Samit Kumar Basu , Peter Michael Edic , Robert Franklin Senzig , William Robert Ross , Xiaoye Wu , Colin Richard Wilson , Mark Ernest Vermilyea , Eugene Lino Saragnese
IPC分类号： G01N23/00
CPC分类号： A61B6/4275 , A61B6/027 , A61B6/03 , A61B6/032 , A61B6/4014 , G01N23/046 , G01N2223/419 , G01T1/2985
摘要： Configurations for stationary imaging systems are provided. The configurations may include combinations of various types of distributed sources of X-ray radiation, which generally include addressable emitter elements which may be triggered for emission in desired sequences and combinations. The sources may be ring-like, partial ring-like, or line-like (typically along a Z-axis), and so forth. Combinations of these are envisaged. Corresponding detectors may also be full ring detectors or partial ring detectors associated with the sources to provide sufficient coverage of imaging volumes and to provide the desired mathematical completeness of the collected data.
摘要翻译：提供固定成像系统的配置。这些配置可以包括各种类型的分布的X射线辐射源的组合，其通常包括可寻址的发射体元件，其可以以期望的顺序和组合被发射。源可以是环状，部分环状或线状（通常沿Z轴），等等。设想这些的组合。相应的检测器还可以是与源相关联的全环检测器或部分环检测器，以提供成像体积的足够覆盖并提供收集的数据的期望的数学完整性。

27. 发明申请

US20070165772A1 Methods and apparatus for scatter correction 有权
公开(公告)号：US20070165772A1
公开(公告)日：2007-07-19
申请号：US11331727
申请日：2006-01-14
申请人： Paavana Sainath , Xiaoye Wu , Masatake Nukui , Ronald Lundgren , Thomas Myers
发明人： Paavana Sainath , Xiaoye Wu , Masatake Nukui , Ronald Lundgren , Thomas Myers
IPC分类号： H05G1/60 , A61B6/00 , G01N23/00 , G21K1/12
CPC分类号： G06T11/005 , A61B6/027 , Y10S378/901
摘要： A method for reconstructing an image of an object includes scanning the object with a computed tomography (CT) system to obtain data, estimating a size of the object using the obtained data, using the estimated size of the object to perform scatter correction on the obtained data, and reconstructing an image using the scatter corrected data.

28. 发明申请

US20050002484A1 Method and apparatus for correcting bone induced spectral artifacts 失效
标题翻译：用于矫正骨诱导的光谱伪影的方法和装置
公开(公告)号：US20050002484A1
公开(公告)日：2005-01-06
申请号：US10611477
申请日：2003-07-01
申请人： Xiaoye Wu , James LeBlanc
发明人： Xiaoye Wu , James LeBlanc
IPC分类号： A61B6/00 , A61B6/03 , G21K1/12 , G01N23/00
CPC分类号： A61B6/583 , A61B6/032 , A61B6/501 , A61B6/585
摘要： The present technique provides for the estimation and correction of bone induced spectral (BIS) artifacts. Spectral matching is employed to approximate the incident X-ray spectrum attenuated by bone and water with an X-ray spectrum attenuated by water alone. A table can be built to express the amount in apparent projection value shift for objects containing bone and water compared with water-like object when their corresponding normalized spectra match. The BIS error may thereby be determined from existing spectral error data obtained from spectral calibration. A corresponding correction factor may be determined from the shift value.
摘要翻译：本技术提供骨诱导光谱（BIS）假象的估计和校正。采用光谱匹配来近似被水和单独衰减的X射线谱衰减的入射X射线谱。当相应的归一化光谱相匹配时，可以建立一个表格来表达含有骨骼和水的物体的表观投影值偏移量，与水样物体相比。因此可以从从光谱校准获得的现有光谱误差数据确定BIS误差。可以从移位值确定相应的校正因子。

29. 发明授权

US08942341B2 Method of dose reduction for CT imaging and apparatus for implementing same 有权
标题翻译： CT成像剂量减少方法及其实施方法
公开(公告)号：US08942341B2
公开(公告)日：2015-01-27
申请号：US13223665
申请日：2011-09-01
申请人： Jiang Hsieh , Abdelaziz Ikhlef , Paavana Sainath , Xiaoye Wu , Roman Melnyk
发明人： Jiang Hsieh , Abdelaziz Ikhlef , Paavana Sainath , Xiaoye Wu , Roman Melnyk
IPC分类号： A61B6/03 , G21K3/00 , A61B6/06 , A61B6/00
CPC分类号： A61B6/032 , A61B6/06 , A61B6/4078 , A61B6/503 , A61B6/542
摘要： A CT system includes an x-ray source configured to project an x-ray beam toward an object, a detector array, and a bowtie filter. The bowtie filter includes a first x-ray filtration region positioned to attenuate x-rays that pass through an isochannel of the detector array, a second x-ray filtration region positioned to attenuate x-rays that pass through channels of the detector array that are offcenter in a channel direction from the isochannel, and an x-ray attenuation material positionable to attenuate the x-rays that pass through the channels of the detector array that are offcenter in the channel direction from the isochannel. The CT system also includes a data acquisition system (DAS) connected to the detector array and configured to receive outputs from the detector array, and a computer programmed to acquire projections of imaging data of the object, and generate an image of the object using the imaging data.
摘要翻译： CT系统包括被配置为将X射线束投影到物体的X射线源，检测器阵列和bowtie滤波器。弓形过滤器包括第一x射线过滤区域，其定位成衰减穿过检测器阵列的等通道的x射线;第二x射线过滤区域，其被定位成衰减穿过检测器阵列的通道的x射线，离子中心在来自等信道的通道方向上，以及x射线衰减材料，其可定位成衰减穿过检测器阵列的通道的X射线，所述X射线在通道方向上偏离同步通道。 CT系统还包括连接到检测器阵列并被配置为接收来自检测器阵列的输出的数据采集系统（DAS），以及被编程为获取对象的成像数据的投影的计算机，并且使用成像数据。

30. 发明申请

US20130058451A1 METHOD OF DOSE REDUCTION FOR CT IMAGING AND APPARATUS FOR IMPLEMENTING SAME 有权
标题翻译：用于CT成像的剂量减少方法和用于实施其的装置
公开(公告)号：US20130058451A1
公开(公告)日：2013-03-07
申请号：US13223665
申请日：2011-09-01
申请人： Jiang Hsieh , Abdelaziz Ikhlef , Paavana Sainath , Xiaoye Wu , Roman Melnyk
发明人： Jiang Hsieh , Abdelaziz Ikhlef , Paavana Sainath , Xiaoye Wu , Roman Melnyk
IPC分类号： A61B6/03
CPC分类号： A61B6/032 , A61B6/06 , A61B6/4078 , A61B6/503 , A61B6/542
摘要： A CT system includes an x-ray source configured to project an x-ray beam toward an object, a detector array, and a bowtie filter. The bowtie filter includes a first x-ray filtration region positioned to attenuate x-rays that pass through an isochannel of the detector array, a second x-ray filtration region positioned to attenuate x-rays that pass through channels of the detector array that are offcenter in a channel direction from the isochannel, and an x-ray attenuation material positionable to attenuate the x-rays that pass through the channels of the detector array that are offcenter in the channel direction from the isochannel. The CT system also includes a data acquisition system (DAS) connected to the detector array and configured to receive outputs from the detector array, and a computer programmed to acquire projections of imaging data of the object, and generate an image of the object using the imaging data.
摘要翻译： CT系统包括被配置为将X射线束投影到物体的X射线源，检测器阵列和bowtie滤波器。弓形过滤器包括第一x射线过滤区域，其定位成衰减穿过检测器阵列的等通道的x射线;第二x射线过滤区域，其被定位成衰减穿过检测器阵列的通道的x射线，离子中心在来自等信道的通道方向上，以及x射线衰减材料，其可定位成衰减穿过检测器阵列的通道的X射线，所述X射线在通道方向上偏离同步通道。 CT系统还包括连接到检测器阵列并被配置为接收来自检测器阵列的输出的数据采集系统（DAS），以及被编程为获取对象的成像数据的投影的计算机，并且使用成像数据。

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