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公开(公告)号：US07086780B2
公开(公告)日：2006-08-08
申请号：US10850009
申请日：2004-05-20
IPC分类号： G01D18/00
摘要： A method for calibrating a computed tomographic imaging apparatus having a gantry, a radiation source operable at a plurality of kVp's, and a detector array having a plurality of detector elements includes using a system detection function to estimate signals of each detector element that would have been detected through air and through a given thickness of water to determine estimated datasets. The estimated datasets are used to determine data pair sets each comprising a normalized water projection value and an ideal projection value for each detector element. The method further includes determining and storing a representation of a mapping function of the normalized water projections values to the ideal projection values in a memory of the computed tomographic imaging apparatus as a spectral calibration of the computed tomographic imaging apparatus.
摘要翻译： 一种用于校准具有台架的计算机断层成像设备的方法，可在多个kVp处操作的辐射源以及具有多个检测器元件的检测器阵列的方法包括使用系统检测功能来估计已经被检测到的每个检测器元件的信号 通过空气和通过给定厚度的水检测以确定估计的数据集。 估计的数据集用于确定每个包括每个检测器元件的归一化水投影值和理想投影值的数据对集合。 该方法还包括将计算机断层成像设备的存储器中的归一化水投影值的映射函数的映射函数确定和存储为理想投影值，作为计算机断层成像设备的光谱校准。
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公开(公告)号：US07391844B2
公开(公告)日：2008-06-24
申请号：US11036618
申请日：2005-01-14
IPC分类号： A61B6/00
摘要： A method for determining a correction for beam hardening in CT images includes obtaining air scans at a plurality of kVp's, determining detection efficiencies for detector elements of the CT imaging apparatus, and estimating projection values through a combination of at least two different materials of different thicknesses. The method further includes determining a transfer function that translates the estimated projection values into ideal projection values for at least two of the different materials and storing the transfer function as the beam hardening correction for images of the CT imaging apparatus.
摘要翻译： 用于确定CT图像中的束硬化校正的方法包括以多个kVp获得空气扫描，确定CT成像装置的检测器元件的检测效率，以及通过组合至少两种不同厚度的不同厚度的材料来估计投影值 。 该方法还包括确定将估计的投影值转换为不同材料中的至少两种的理想投影值并将传递函数存储为CT成像装置的图像的束硬化校正的传递函数。
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公开(公告)号：US07747057B2
公开(公告)日：2010-06-29
申请号：US11442450
申请日：2006-05-26
申请人： Xiaoye Wu , Paavana Sainath , Thomas Louis Toth , Thomas John Myers , Mary Sue Kulpins , Xiangyang Tang , Roy-Arnulf Helge Nilsen
发明人： Xiaoye Wu , Paavana Sainath , Thomas Louis Toth , Thomas John Myers , Mary Sue Kulpins , Xiangyang Tang , Roy-Arnulf Helge Nilsen
CPC分类号： G06T11/008 , A61B6/027 , Y10S128/92
摘要： A method for performing BIS correction includes scanning an object with a computed tomography (CT) system to obtain data, reconstructing an image using the obtained data, and using the image to perform BIS correction.
摘要翻译： 用于执行BIS校正的方法包括用计算机断层摄影（CT）系统扫描对象以获得数据，使用所获得的数据重建图像，并且使用该图像执行BIS校正。
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公开(公告)号：US20050259784A1
公开(公告)日：2005-11-24
申请号：US10850009
申请日：2004-05-20
申请人： Xiaoye Wu , Neil Bromberg , Alexander Kolker , Piero Simoni , Thomas Toth
发明人： Xiaoye Wu , Neil Bromberg , Alexander Kolker , Piero Simoni , Thomas Toth
摘要： A method for calibrating a computed tomographic imaging apparatus having a gantry, a radiation source operable at a plurality of kVp's, and a detector array having a plurality of detector elements includes using a system detection function to estimate signals of each detector element that would have been detected through air and through a given thickness of water to determine estimated datasets. The estimated datasets are used to determine data pair sets each comprising a normalized water projection value and an ideal projection value for each detector element. The method further includes determining and storing a representation of a mapping function of the normalized water projections values to the ideal projection values in a memory of the computed tomographic imaging apparatus as a spectral calibration of the computed tomographic imaging apparatus.
摘要翻译： 一种用于校准具有台架的计算机断层成像设备的方法，可在多个kVp处操作的辐射源以及具有多个检测器元件的检测器阵列的方法包括使用系统检测功能来估计已经被检测到的每个检测器元件的信号 通过空气和通过给定厚度的水检测以确定估计的数据集。 估计的数据集用于确定每个包括每个检测器元件的归一化水投影值和理想投影值的数据对集合。 该方法还包括将计算机断层成像设备的存储器中的归一化水投影值的映射函数的映射函数确定和存储为理想投影值，作为计算机断层成像设备的光谱校准。
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公开(公告)号：US20070274581A1
公开(公告)日：2007-11-29
申请号：US11442450
申请日：2006-05-26
申请人： Xiaoye Wu , Paavana Sainath , Thomas Louis Toth , Thomas John Myers , Mary Sue Kulpins , Xiangyang Tang , Roy-Arnulf Helge Nilsen
发明人： Xiaoye Wu , Paavana Sainath , Thomas Louis Toth , Thomas John Myers , Mary Sue Kulpins , Xiangyang Tang , Roy-Arnulf Helge Nilsen
IPC分类号： G06K9/00
CPC分类号： G06T11/008 , A61B6/027 , Y10S128/92
摘要： A method for performing BIS correction includes scanning an object with a computed tomography (CT) system to obtain data, reconstructing an image using the obtained data, and using the image to perform BIS correction.
摘要翻译： 用于执行BIS校正的方法包括用计算机断层摄影（CT）系统扫描对象以获得数据，使用所获得的数据重建图像，并且使用该图像执行BIS校正。
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公开(公告)号：US08611627B2
公开(公告)日：2013-12-17
申请号：US12976785
申请日：2010-12-22
申请人： Xiaoye Wu , Robert Franklin Senzig , Jing Zhao
发明人： Xiaoye Wu , Robert Franklin Senzig , Jing Zhao
IPC分类号： G06K9/00
CPC分类号： A61B6/032 , A61B6/5205 , A61B6/5229 , A61B6/583 , G06T11/005
摘要： The present disclosure relates to the performing spectral calibration of a CT imaging system. In accordance with certain embodiments, spectral calibration phantoms are scanned while positioned on a table in the imaging volume of the CT imaging system. The scans of the calibration phantoms, in conjunction with air sans performed on the CT imaging system, are used to derive information about the deviation of the measured phantom scans from an ideal. The deviation information is in turn used to derive spectral calibration vectors that may be used with the CT imaging system.
摘要翻译： 本公开涉及执行CT成像系统的光谱校准。 根据某些实施例，在定位在CT成像系统的成像体积的台上的同时扫描光谱校准模体。 校准模型的扫描结合在CT成像系统上执行的空气，用于得到关于测量的幻影扫描与理想的偏差的信息。 偏差信息又用于导出可与CT成像系统一起使用的光谱校准矢量。
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7.发明授权公开(公告)号：US08483361B2
公开(公告)日：2013-07-09
申请号：US12976950
申请日：2010-12-22
申请人： Paavana Sainath , Xiaoye Wu , Girijesh K. Yadava
发明人： Paavana Sainath , Xiaoye Wu , Girijesh K. Yadava
IPC分类号： H01J35/30
CPC分类号： H01J35/10 , A61B6/027 , A61B6/032 , A61B6/4021 , A61B6/4028 , A61B6/4078 , A61B6/4233 , A61B6/482 , H01J35/14 , H01J2235/081 , H01J2235/086
摘要： Anode targets for an x-ray tube and methods for controlling x-ray tubes for x-ray systems are provided. One x-ray system includes a field-generator configured to generate a field, an electron beam generator configured to generate an electron beam directed towards a target and a voltage controller configured to control the electron beam generator to produce an electron beam at a first energy level and an electron beam at a second energy level. The x-ray system also includes a field-generator controller configured to control a field to deflect at least one of the electron beams, wherein the electron beam, at the first energy level, impinges on the target at a first contact position and the electron beam, at the second energy level, impinges on the target at a second contact position. The at the first contact position and at the second contact position is configured to filter x-rays.
摘要翻译： 阳极靶向X射线管，并提供了用于控制x射线系统的X射线管的方法。 一个x射线系统包括被配置为产生场的场发生器，被配置为产生朝向目标的电子束的电子束发生器和被配置为控制电子束发生器以产生第一能量的电子束的电压控制器 电平和电子束处于第二能级。 x射线系统还包括场发生器控制器，其被配置为控制场以偏转至少一个电子束，其中在第一能级处的电子束在第一接触位置撞击靶，并且电子 在第二能量水平处的光束在第二接触位置处撞击在目标上。 在第一接触位置处和在第二接触位置处被配置为过滤x射线。
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8.发明授权Method of fast current modulation in an X-ray tube and apparatus for implementing same 有权X射线管中的快速电流调制方法及其实现方法公开(公告)号：US08396185B2
公开(公告)日：2013-03-12
申请号：US12778756
申请日：2010-05-12
申请人： Yun Zou , Brian Lounsberry , Carey Shawn Rogers , Sergio Lemaitre , Xiaoye Wu , Jizhong Chen , Floribertus P. Heukensfeldt Jansen
发明人： Yun Zou , Brian Lounsberry , Carey Shawn Rogers , Sergio Lemaitre , Xiaoye Wu , Jizhong Chen , Floribertus P. Heukensfeldt Jansen
CPC分类号： A61B6/405 , A61B6/032 , A61B6/4021 , A61B6/4291 , A61B6/482 , H01J35/045 , H01J35/06
摘要： An X-ray tube includes a target and a cathode assembly. The cathode assembly includes a first filament configured to emit a first beam of electrons toward the target, a first gridding electrode coupled to the first filament, a second filament configured to emit a second beam of electrons toward the target, and a second gridding electrode coupled to the second filament.
摘要翻译： X射线管包括靶和阴极组件。 阴极组件包括：第一灯丝，被配置为朝向靶发射第一电子束;第一栅网电极，其耦合到第一灯丝;第二灯丝，被配置为朝向靶发射第二电子束;以及第二栅电极， 到第二根丝。
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公开(公告)号：US08363779B2
公开(公告)日：2013-01-29
申请号：US13484707
申请日：2012-05-31
申请人： Naveen Chandra , Xiaoye Wu , Thomas L. Toth , Jiang Hsieh
发明人： Naveen Chandra , Xiaoye Wu , Thomas L. Toth , Jiang Hsieh
CPC分类号： A61B6/4035 , A61B6/032 , A61B6/4007 , A61B6/405 , A61B6/4241 , A61B6/482
摘要： A CT system includes a rotatable gantry having an opening for receiving an object to be scanned, and a controller. The controller is configured to apply a first kVp for a first time period, apply a second kVp for a second time period, integrate two or more view datasets during the first time period, integrate one or more view datasets during the second time period, and generate an image using the datasets integrated during the first time period and during the second time period.
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机架和控制器。 控制器被配置为在第一时间段内施加第一kVp，在第二时间段施加第二kVp，在第一时间段期间集成两个或更多个视图数据集，在第二时间段期间集成一个或多个视图数据集;以及 使用在第一时间段期间和第二时间段期间集成的数据集生成图像。
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公开(公告)号：US08160200B2
公开(公告)日：2012-04-17
申请号：US12750050
申请日：2010-03-30
申请人： John Eric Tkaczyk , David Allen Langan , Samit Kumar Basu , Xiaoye Wu , Bruno Kristiaan Bernard De Man , Jeffrey Seymour Gordon
发明人： John Eric Tkaczyk , David Allen Langan , Samit Kumar Basu , Xiaoye Wu , Bruno Kristiaan Bernard De Man , Jeffrey Seymour Gordon
IPC分类号： H05G1/26
CPC分类号： A61B6/4035 , A61B6/032 , A61B6/405 , A61B6/4241 , A61B6/482 , A61B6/488 , A61B6/542
摘要： A technique for acquiring desired image data in an imaging system comprising at least one radiation source and a detector is described. Initially, preliminary image data corresponding to an object may be acquired. Further, at least one parameter associated with the radiation source and corresponding to a particular view angle of the radiation source may be determined based on the preliminary image data and a priori information. Similarly, at least one parameter associated with the detector and corresponding to the particular view angle may be determined based on a priori information and the preliminary image data. Efficient operating modes of the radiation source and the detector corresponding to the particular view angle may be selected based on the determined parameters to achieve a desired system performance. Subsequently, the final image data may be acquired using the selected operating modes of the radiation source and the detector.
摘要翻译： 描述了在包括至少一个辐射源和检测器的成像系统中获取所需图像数据的技术。 首先，可以获取与对象相对应的初步图像数据。 此外，可以基于初步图像数据和先验信息来确定与辐射源相关联并且对应于辐射源的特定视角的至少一个参数。 类似地，可以基于先验信息和初步图像数据来确定与检测器相关联并且对应于特定视角的至少一个参数。 可以基于确定的参数来选择对应于特定视角的辐射源和检测器的有效操作模式以实现期望的系统性能。 随后，可以使用所选择的辐射源和检测器的操作模式来获取最终图像数据。
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