公开(公告)号：US20100080357A1

公开(公告)日：2010-04-01

申请号：US12243610

申请日：2008-10-01

申请人： Jason Stuart Katcha ,  Thomas Louis Toth ,  Jiang Hsieh ,  Carey Shawn Rogers ,  John Scott Price ,  Baojun Li ,  Yun Zou

发明人： Jason Stuart Katcha ,  Thomas Louis Toth ,  Jiang Hsieh ,  Carey Shawn Rogers ,  John Scott Price ,  Baojun Li ,  Yun Zou

IPC分类号： H01J35/10 ,  H01J35/08

CPC分类号： H01J35/10 ,  H01J2235/068 ,  H01J2235/086

摘要： An x-ray tube is disclosed herein. The x-ray tube includes an anode assembly adapted to rotate generally about a rotational axis. The anode assembly includes a first target surface at least partially disposed at a first angle greater than 70 degrees with respect to the rotational axis and a second target surface at least partially disposed at a second angle greater than 70 degrees with respect to the rotational axis. The first target surface is adapted to emit a first x-ray beam and the second target surface is adapted to emit a second x-ray beam. A CT system is also disclosed.

摘要翻译： 本文公开了一种X射线管。 X射线管包括适于大致围绕旋转轴线旋转的阳极组件。 阳极组件包括至少部分地以相对于旋转轴线大于70度的第一角度设置的第一目标表面和相对于旋转轴线以大于70度的第二角度至少部分地设置的第二目标表面。 第一目标表面适于发射第一x射线束，并且第二目标表面适于发射第二x射线束。 还公开了一种CT系统。

公开(公告)号：US07649973B1

公开(公告)日：2010-01-19

申请号：US12244569

申请日：2008-10-02

申请人： Baojun Li ,  Thomas Louis Toth ,  Jiang Hsieh

发明人： Baojun Li ,  Thomas Louis Toth ,  Jiang Hsieh

IPC分类号： G01N23/083

CPC分类号： G01N23/04 ,  A61B6/032 ,  A61B6/4035 ,  A61B6/482 ,  A61B6/542 ,  G01N2223/313 ,  G01T1/2985

摘要： An imaging system includes at least two x-ray sources, an x-ray detector assembly and an attenuation filter. The at least two x-ray sources are displaced along a z-axis and configured to alternately emit x-ray beams. The x-ray detector assembly is configured to detect the x-ray beams. The attenuation filter is mounted proximate the at least two x-ray sources and is configured to provide different amounts of x-ray attenuation to the x-ray beams along the z-axis.

摘要翻译： 成像系统包括至少两个X射线源，X射线检测器组件和衰减滤波器。 所述至少两个x射线源沿Z轴移位并被配置为交替地发射x射线束。 x射线检测器组件被配置为检测x射线束。 所述衰减滤波器安装在所述至少两个x射线源附近，并且被配置为沿着z轴向x射线束提供不同量的X射线衰减。

公开(公告)号：US08699811B2

公开(公告)日：2014-04-15

申请号：US13009584

申请日：2011-01-19

申请人： Baojun Li ,  Jiang Hsieh

发明人： Baojun Li ,  Jiang Hsieh

IPC分类号： G06K9/40

CPC分类号： G01T1/2985

摘要： An imaging system includes a two-dimensional detector having a plurality of cells wherein each cell is configured to detect energy or signal passing through an object. The imaging system includes a computer programmed to acquire imaging data for the plurality of cells, identify a cell to be corrected, based on the imaging data, interpolate Ix and Iy for the identified cell based on neighbor cells, and calculate local gradients gx and gy between the identified cell and its neighbor cells based on the interpolation. The computer is further programmed to calculate weighting factors wx and wy based on the local gradients, calculate a corrected final value I(0,0) for the identified cell, and correct the identified cell with the corrected final value.

摘要翻译： 成像系统包括具有多个单元的二维检测器，其中每个单元被配置为检测通过物体的能量或信号。 成像系统包括被编程为采集多个单元的成像数据的计算机，基于成像数据识别要校正的单元，基于相邻单元对所识别的单元插值Ix和Iy，并计算局部梯度gx和gy 基于内插，在所识别的小区及其相邻小区之间。 计算机还被编程为基于局部梯度计算加权因子wx和wy，计算所识别的单元的校正后的最终值I（0,0），并用校正的最终值校正所识别的单元。

公开(公告)号：US20110142314A1

公开(公告)日：2011-06-16

申请号：US12638723

申请日：2009-12-15

申请人： Jiang Hsieh ,  Roy-Arnulf Helge Nilsen ,  Peter Michael Edic ,  Bruno Kristiaan Bernard De Man ,  Jean-Baptiste Thibault ,  Baojun Li ,  John Lawrence Seamans

发明人： Jiang Hsieh ,  Roy-Arnulf Helge Nilsen ,  Peter Michael Edic ,  Bruno Kristiaan Bernard De Man ,  Jean-Baptiste Thibault ,  Baojun Li ,  John Lawrence Seamans

IPC分类号： G06T7/00 ,  G06K9/32

CPC分类号： A61B6/032 ,  A61B6/482 ,  A61B6/503 ,  G06T11/006 ,  G06T2211/412 ,  G06T2211/424

摘要： A system, method, and apparatus includes a computed tomography (CT) system having a rotatable gantry, an x-ray source, a generator, a detector having pixels and positioned to receive x-rays, and a computer. The computer is programmed to acquire CT data representative of an object, determine a first subset of the CT data, determine a second subset of the CT data, and determine a difference between the first and second subsets of the CT data to identify a motion region in the object. The computer is also programmed to update image data reconstructed from a first portion of the first subset of the CT data and corresponding to the region and reconstruct an image based on the updated image data and non-updated image data. The non-updated image data is reconstructed from a second portion the first subset of the CT data.

摘要翻译： 系统，方法和装置包括具有可旋转机架，X射线源，发生器，具有像素并被定位成接收x射线的检测器的计算机断层摄影（CT）系统和计算机。 计算机被编程为获取表示对象的CT数据，确定CT数据的第一子集，确定CT数据的第二子集，并且确定CT数据的第一和第二子集之间的差异，以识别运动区域 在对象中。 计算机还被编程为更新从CT数据的第一子集的第一部分重建并对应于该区域的图像数据，并且基于更新的图像数据和未更新的图像数据重建图像。 从CT数据的第一子集的第二部分重构未更新的图像数据。

公开(公告)号：US20050265590A1

公开(公告)日：2005-12-01

申请号：US10859423

申请日：2004-06-01

申请人： Baojun Li ,  Stephen Metz ,  John Sabol ,  Gopal Avinash ,  Jiang Hsieh

发明人： Baojun Li ,  Stephen Metz ,  John Sabol ,  Gopal Avinash ,  Jiang Hsieh

IPC分类号： G06K9/00

CPC分类号： G06T11/005 ,  G06T2211/424 ,  G06T2211/436

摘要： Systems, methods and apparatus are provided through which in one aspect, a three-dimensional (3D) image of an object is constructed from a plurality of two-dimensional (2D) images of the object using a specialized filter. The specialized filter implements a linear ramp function, a windowing function, and/or a polynomial function. The 3D image is back-projected from the filtered two-dimensional images, yielding a 3D image that has improved visual distinction of overlapping anatomic structures and reduced blurring.

摘要翻译： 提供了一种系统，方法和装置，通过该系统，方法和装置，在一个方面，使用专用滤波器从对象的多个二维（2D）图像构建对象的三维（3D）图像。 专用滤波器实现线性斜坡函数，加窗函数和/或多项式函数。 3D图像从经滤波的二维图像中反投影，产生3D图像，其改善了重叠解剖结构的视觉区别并减少了模糊。

公开(公告)号：US20050111616A1

公开(公告)日：2005-05-26

申请号：US10723034

申请日：2003-11-26

申请人： Baojun Li ,  Bernhard Claus ,  Gopal Avinash ,  Stephen Metz ,  Jiang Hsieh

发明人： Baojun Li ,  Bernhard Claus ,  Gopal Avinash ,  Stephen Metz ,  Jiang Hsieh

IPC分类号： A61B6/02 ,  A61B6/03 ,  G06T11/00 ,  G21K1/12 ,  H05G1/60 ,  G01N23/00 ,  A61B6/00 ,  H05G1/00

CPC分类号： A61B6/025 ,  G06F19/00 ,  G06T11/005 ,  G06T2211/436

摘要： A technique is provided for non-uniform weighting in back-projection calculations in tomosythesis. The non-uniform weighting may include weighting based on a count map of the number of times pixels of individual slices are traversed by radiation in different projections. Weighting may also include non-uniform functions for contributions of features at different slice level to the sensed X-ray attenuation system response inconsistencies are accounted for by further weighting based upon projection maps which may be created in separate system calibration or configuration routines.

摘要翻译： 提供了一种技术，用于在重构运算中的反投影计算中的不均匀加权。 不均匀加权可以包括基于不同投影中的辐射遍历各个切片的像素的次数的计数图的加权。 加权还可以包括用于在不同切片级别对感测的X射线衰减系统的特征贡献的不均匀的功能。通过基于可以在单独的系统校准或配置例程中创建的投影图进一步加权来解决不一致性。

公开(公告)号：US20110116700A1

公开(公告)日：2011-05-19

申请号：US13009584

申请日：2011-01-19

申请人： Baojun Li ,  Jiang Hsieh

发明人： Baojun Li ,  Jiang Hsieh

IPC分类号： G06K9/00 ,  G06F19/00

CPC分类号： G01T1/2985

摘要： An imaging system includes a two-dimensional detector having a plurality of cells wherein each cell is configured to detect energy or signal passing through an object. The imaging system includes a computer programmed to acquire imaging data for the plurality of cells, identify a cell to be corrected, based on the imaging data, interpolate Ix and Iy for the identified cell based on neighbor cells, and calculate local gradients gx and gy between the identified cell and its neighbor cells based on the interpolation. The computer is further programmed to calculate weighting factors wx and wy based on the local gradients, calculate a corrected final value I(0,0) for the identified cell, and correct the identified cell with the corrected final value.

摘要翻译： 成像系统包括具有多个单元的二维检测器，其中每个单元被配置为检测通过物体的能量或信号。 成像系统包括被编程为采集多个单元的成像数据的计算机，基于成像数据识别要校正的单元，基于相邻单元对所识别的单元插值Ix和Iy，并计算局部梯度gx和gy 基于内插，在所识别的小区及其相邻小区之间。 计算机还被编程为基于局部梯度计算加权因子wx和wy，计算所识别的单元的校正后的最终值I（0,0），并用校正的最终值校正所识别的单元。

公开(公告)号：US20080107324A1

公开(公告)日：2008-05-08

申请号：US11950418

申请日：2007-12-04

申请人： Jiang Hsieh ,  Stephen Metz ,  Gopal Avinash ,  Baojun Li ,  John Sabol

发明人： Jiang Hsieh ,  Stephen Metz ,  Gopal Avinash ,  Baojun Li ,  John Sabol

IPC分类号： G06K9/00

CPC分类号： G06T11/005 ,  G06T2211/424 ,  G06T2211/436

摘要： Systems, methods and apparatus are provided through which in one aspect, a three-dimensional (3D) image of an object is constructed from a plurality of two-dimensional (2D) images of the object using a specialized filter. In some embodiments, the specialized filter implements a linear ramp function, a windowing function, and/or a polynomial function. In some embodiments, the 3D image is back-projected from the filtered two-dimensional images, yielding a 3D image that has improved visual distinction of overlapping anatomic structures and reduced blurring.

摘要翻译： 提供了一种系统，方法和装置，通过该系统，方法和装置，在一个方面，使用专用滤波器从对象的多个二维（2D）图像构建对象的三维（3D）图像。 在一些实施例中，专用滤波器实现线性斜坡函数，加窗函数和/或多项式函数。 在一些实施例中，3D图像从经过滤的二维图像反投影，产生3D重建解剖结构改善的视觉区别并减少模糊。

公开(公告)号：US07310436B2

公开(公告)日：2007-12-18

申请号：US10859423

申请日：2004-06-01

申请人： Baojun Li ,  Steven W. Metz ,  John Michael Sabol ,  Gopal B. Avinash ,  Jiang Hsieh

发明人： Baojun Li ,  Steven W. Metz ,  John Michael Sabol ,  Gopal B. Avinash ,  Jiang Hsieh

IPC分类号： G06K9/00

CPC分类号： G06T11/005 ,  G06T2211/424 ,  G06T2211/436

摘要： Systems, methods and apparatus are provided through which in one aspect, a three-dimensional (3D) image of an object is constructed from a plurality of two-dimensional (2D) images of the object using a specialized filter. The specialized filter implements a linear ramp function, a windowing function, and/or a polynomial function. The 3D image is back-projected from the filtered two-dimensional images, yielding a 3D image that has improved visual distinction of overlapping anatomic structures and reduced blurring.

摘要翻译： 提供了一种系统，方法和装置，通过该系统，方法和装置，在一个方面，使用专用滤波器从对象的多个二维（2D）图像构建对象的三维（3D）图像。 专用滤波器实现线性斜坡函数，加窗函数和/或多项式函数。 3D图像从经滤波的二维图像中反投影，产生3D图像，其改善了重叠解剖结构的视觉区别并减少了模糊。

公开(公告)号：US20120314928A1

公开(公告)日：2012-12-13

申请号：US13593156

申请日：2012-08-23

申请人： Jiang Hsieh ,  Roy-Arnulf Helge Nilsen ,  Peter Michael Edic ,  Bruno Kristiaan Bernard De Man ,  Jean-Baptiste Thibault ,  Baojun Li ,  John Lawrence Seamans

发明人： Jiang Hsieh ,  Roy-Arnulf Helge Nilsen ,  Peter Michael Edic ,  Bruno Kristiaan Bernard De Man ,  Jean-Baptiste Thibault ,  Baojun Li ,  John Lawrence Seamans

IPC分类号： G06K9/46

CPC分类号： A61B6/032 ,  A61B6/482 ,  A61B6/503 ,  G06T11/006 ,  G06T2211/412 ,  G06T2211/424

摘要： A system, method, and apparatus includes a computed tomography (CT) system having a rotatable gantry, an x-ray source, a generator, a detector having pixels and positioned to receive x-rays, and a computer. The computer is programmed to acquire CT data representative of an object, determine a first subset of the CT data, determine a second subset of the CT data, and determine a difference between the first and second subsets of the CT data to identify a motion region in the object. The computer is also programmed to update image data reconstructed from a first portion of the first subset of the CT data and corresponding to the region and reconstruct an image based on the updated image data and non-updated image data. The non-updated image data is reconstructed from a second portion the first subset of the CT data.

摘要翻译： 系统，方法和装置包括具有可旋转机架，X射线源，发生器，具有像素并被定位成接收x射线的检测器的计算机断层摄影（CT）系统和计算机。 计算机被编程为获取表示对象的CT数据，确定CT数据的第一子集，确定CT数据的第二子集，并且确定CT数据的第一和第二子集之间的差异，以识别运动区域 在对象中。 计算机还被编程为更新从CT数据的第一子集的第一部分重建并对应于该区域的图像数据，并且基于更新的图像数据和未更新的图像数据重建图像。 从CT数据的第一子集的第二部分重构未更新的图像数据。