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1. 发明授权

US07379527B2 Methods and apparatus for CT calibration 有权
标题翻译： CT校准方法和装置
公开(公告)号：US07379527B2
公开(公告)日：2008-05-27
申请号：US11315938
申请日：2005-12-22
申请人： Xiaoye Wu , Paavana Sainath , Ferry Tamtoro , Jean-Baptiste Thibault , Roy-Arnulf Helge Nilsen
发明人： Xiaoye Wu , Paavana Sainath , Ferry Tamtoro , Jean-Baptiste Thibault , Roy-Arnulf Helge Nilsen
IPC分类号： G01N23/00
CPC分类号： A61B6/583 , A61B6/027 , A61B6/032 , G01N2223/3035 , Y10S378/901
摘要： A method for normalizing a calibration of a computed tomographic (CT) imaging apparatus having a plurality of detector rows includes utilizing a prestored, predetermined inversion matrix and CT numbers obtained from images of a phantom to determine normalized calibration vectors for each row of a plurality of detector rows, and storing the determined normalized calibration vectors for each row of the plurality of detector rows in a memory for use in subsequent image reconstructions.
摘要翻译：用于对具有多个检测器行的计算机断层摄影（CT）成像设备进行校准的归一化方法包括利用预先存储的预定反演矩阵和从体模图像获得的CT数来确定多个检测器行，并且将所确定的多个检测器行中的每行的归一化校准向量存储在存储器中，以用于随后的图像重建。

2. 发明申请

US20070147580A1 Methods and apparatus for CT calibration 有权
标题翻译： CT校准方法和装置
公开(公告)号：US20070147580A1
公开(公告)日：2007-06-28
申请号：US11315938
申请日：2005-12-22
申请人： Xiaoye Wu , Paavana Sainath , Ferry Tamtoro , Jean-Baptiste Thibault , Roy-Arnulf Nilsen
发明人： Xiaoye Wu , Paavana Sainath , Ferry Tamtoro , Jean-Baptiste Thibault , Roy-Arnulf Nilsen
IPC分类号： A61B6/00 , H05G1/60 , G01N23/00 , G21K1/12
CPC分类号： A61B6/583 , A61B6/027 , A61B6/032 , G01N2223/3035 , Y10S378/901
摘要： A method for normalizing a calibration of a computed tomographic (CT) imaging apparatus having a plurality of detector rows includes utilizing a prestored, predetermined inversion matrix and CT numbers obtained from images of a phantom to determine normalized calibration vectors for each row of a plurality of detector rows, and storing the determined normalized calibration vectors for each row of the plurality of detector rows in a memory for use in subsequent image reconstructions.
摘要翻译：用于对具有多个检测器行的计算机断层摄影（CT）成像设备进行校准的归一化方法包括利用预先存储的预定反演矩阵和从体模图像获得的CT数来确定多个检测器行，并且将所确定的多个检测器行中的每行的归一化校准向量存储在存储器中，以用于随后的图像重建。

3. 发明授权

US07747057B2 Methods and apparatus for BIS correction 失效
标题翻译： BIS校正的方法和装置
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
IPC分类号： G06K9/00 , G01N23/00
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。

4. 发明申请

US20070274581A1 Methods and apparatus for BIS correction 失效
标题翻译： BIS校正的方法和装置
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。

5. 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。

6. 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。

7. 发明授权

US07801264B2 Method for calibrating a dual -spectral computed tomography (CT) system 有权
标题翻译：校准双光谱计算机断层摄影（CT）系统的方法
公开(公告)号：US07801264B2
公开(公告)日：2010-09-21
申请号：US11959709
申请日：2007-12-19
申请人： Xiaoye Wu , James Walter Leblanc , Paavana Sainath
发明人： Xiaoye Wu , James Walter Leblanc , Paavana Sainath
IPC分类号： A61B6/00
CPC分类号： A61B6/583 , A61B6/032 , A61B6/482 , A61B6/505
摘要： A method for calibrating and reconstructing material density images in a dual-spectral computed tomography (CT) system 100 is disclosed. An X-ray source in the CT system 100 emits a first X-ray spectrum and a second X-ray spectrum towards an object. The method includes computing calibration coefficients by using projection data from the object for the two X-ray spectra and by linearizing at least two basis materials such as bone and water simultaneously. Further, basis materials decomposition coefficients for the at least two basis materials are computed by linearizing the basis materials individually. Correction values for the projection data and for the basis materials are then computed by using the basis materials decomposition coefficients and the calibration coefficients. The computed correction values are used in reconstructing material density images for the basis materials.
摘要翻译：公开了一种用于在双光谱计算机断层摄影（CT）系统100中校准和重建材料密度图像的方法。 CT系统100中的X射线源朝向物体发射第一X射线光谱和第二X射线光谱。该方法包括通过使用来自对象的两个X射线光谱的投影数据和同时线性化至少两种基础材料例如骨骼和水来计算校准系数。此外，通过将基础材料单独线性化来计算至少两种基础材料的基础材料分解系数。然后通过使用基础材料分解系数和校准系数来计算投影数据和基础材料的校正值。计算的校正值用于重建基础材料的材料密度图像。

8. 发明授权

US08483361B2 Anode target for an x-ray tube and method for controlling the x-ray tube 有权
标题翻译：用于X射线管的阳极靶和用于控制X射线管的方法
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。

9. 发明申请

US20110211667A1 DE-POPULATED DETECTOR FOR COMPUTED TOMOGRAPHY AND METHOD OF MAKING SAME 审中-公开
标题翻译：用于计算机图像的人口检测器及其制造方法
公开(公告)号：US20110211667A1
公开(公告)日：2011-09-01
申请号：US12714168
申请日：2010-02-26
申请人： Abdelaziz Ikhlef , Jiang Hsieh , Jeffrey Alan Kautzer , Robert F. Senzig , Bruno Kristiaan Bernard De Man , Paavana Sainath , Xiaoye Wu , Jed Douglas Pack
发明人： Abdelaziz Ikhlef , Jiang Hsieh , Jeffrey Alan Kautzer , Robert F. Senzig , Bruno Kristiaan Bernard De Man , Paavana Sainath , Xiaoye Wu , Jed Douglas Pack
IPC分类号： H05G1/60 , B23P11/00
CPC分类号： A61B6/4208 , A61B6/032 , G01T1/2985 , Y10T29/49826
摘要： A system, method, and apparatus includes a computed tomography (CT) detector array having a central region with a plurality of central region detecting cells configured to acquire CT data of a first number of slices during a scan, a first wing along a first side of the central region, and a second wing along a second side of the central region opposite the first side. The first wing includes a plurality of first wing detecting cells configured to acquire CT data of a second number of slices during the scan. The second wing includes a plurality of second wing detecting cells configured to acquire CT data of a third number of slices during the scan. The second and third number of slices are less than the first number of slices. The first wing detecting cells are of a different type than the central region detecting cells.
摘要翻译：系统，方法和装置包括具有中心区域的计算机断层摄影（CT）检测器阵列，多个中心区域检测单元被配置为在扫描期间获取第一数量的切片的CT数据，沿着第一侧并且沿着与第一侧相对的中心区域的第二侧的第二翼。第一机翼包括多个第一机翼检测单元，其被配置为在扫描期间获取第二数量的切片的CT数据。第二翼包括多个第二翼检测单元，其被配置为在扫描期间获取第三数量的切片的CT数据。第二和第三数量的切片小于第一数量的切片。第一机翼检测单元与中央区域检测单元不同。

10. 发明申请

US20090161814A1 METHOD FOR CALIBRATING A DUAL -SPECTRAL COMPUTED TOMOGRAPHY (CT) SYSTEM 有权
标题翻译：用于校准双重计算机图像（CT）系统的方法
公开(公告)号：US20090161814A1
公开(公告)日：2009-06-25
申请号：US11959709
申请日：2007-12-19
申请人： Xiaoye Wu , James Walter Leblanc , Paavana Sainath
发明人： Xiaoye Wu , James Walter Leblanc , Paavana Sainath
IPC分类号： G12B13/00 , G06K9/00 , A61B6/03
CPC分类号： A61B6/583 , A61B6/032 , A61B6/482 , A61B6/505
摘要： A method for calibrating and reconstructing material density images in a dual-spectral computed tomography (CT) system 100 is disclosed. An X-ray source in the CT system 100 emits a first X-ray spectrum and a second X-ray spectrum towards an object. The method includes computing calibration coefficients by using projection data from the object for the two X-ray spectra and by linearizing at least two basis materials such as bone and water simultaneously. Further, basis materials decomposition coefficients for the at least two basis materials are computed by linearizing the basis materials individually. Correction values for the projection data and for the basis materials are then computed by using the basis materials decomposition coefficients and the calibration coefficients. The computed correction values are used in reconstructing material density images for the basis materials.
摘要翻译：公开了一种用于在双光谱计算机断层摄影（CT）系统100中校准和重建材料密度图像的方法。 CT系统100中的X射线源朝向物体发射第一X射线光谱和第二X射线光谱。该方法包括通过使用来自对象的两个X射线光谱的投影数据和同时线性化至少两种基础材料例如骨骼和水来计算校准系数。此外，通过将基础材料单独线性化来计算至少两种基础材料的基础材料分解系数。然后通过使用基础材料分解系数和校准系数来计算投影数据和基础材料的校正值。计算的校正值用于重建基础材料的材料密度图像。

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