公开(公告)号：WO1998027415A2

公开(公告)日：1998-06-25

申请号：PCT/US1997023142

申请日：1997-12-04

Applicant: GENERAL ELECTRIC COMPANY

Inventor： GENERAL ELECTRIC COMPANY ,  HU, Hui

IPC: G01N00/00

CPC classification number: A61B6/032 ,  A61B6/027 ,  G06T11/005 ,  G06T2211/416 ,  G06T2211/432 ,  Y10S378/901

Abstract: In a computed tomography imaging system, wherein a longitudinally-unbounded object is oriented with respect to a source of cone beam radiation and a detector array, a method is provided for reconstructing an image of the longitudinally-unbounded object. Initially, relative movement between a longitudinally-unbounded object and the cone beam source is established along at least one circular scan path and at least one linear component. The cone beam is operated to irradiate measurable regions of the object while a prescribed orbit is traversed, to project an image of the longitudinally-unbounded object as cone beam data, onto the detector array. A scan field of view is defined, relative to the cone beam geometry. An error propagation distance in a Z direction is determined for the scan. The definition of the scan field of view is then modified, according to error propagation distance, and a set of image reconstruction data is generated, within the modified field of view, from the circular and linear scan paths.

Abstract translation: 在计算机断层成像系统中，其中纵向无界物体相对于锥形束辐射源和检测器阵列定向，提供了用于重建纵向无界物体的图像的方法。 最初，沿着至少一个圆形扫描路径和至少一个线性分量建立纵向无界物体与锥形束源之间的相对移动。 操作锥形束以在规定的轨道穿过时照射物体的可测量区域，将纵向无界物体的图像作为锥形束数据投影到检测器阵列上。 相对于锥形束几何形状，定义扫描视场。 为扫描确定Z方向的误差传播距离。 然后根据误差传播距离修改扫描视野的定义，并且在修改的视野内，从圆形和线性扫描路径生成一组图像重建数据。

公开(公告)号：WO1995022115A1

公开(公告)日：1995-08-17

申请号：PCT/US1995001532

申请日：1995-02-06

Applicant: GENERAL ELECTRIC COMPANY

Inventor： GENERAL ELECTRIC COMPANY ,  HU, Hui

IPC: G06F159/00

CPC classification number: G06T11/008 ,  G01N23/046 ,  G01N2223/419 ,  G06T2211/421 ,  H05G1/60 ,  Y10S378/901

Abstract: A computed tomography x-ray imaging system (10) acquires a three-dimensional array of x-ray attenuation values using a cone beam x-ray source (13) and a curved two-dimensional array (16) of detector elements. Two-dimensional image slices are reconstructed using a filtered backprojection method, and corrections are made to the images to account for inaccuracies in the reconstruction method and for incomplete data due to the cone beam geometry.

Abstract translation: 计算机断层摄影X射线成像系统（10）使用锥形束x射线源（13）和检测器元件的弯曲二维阵列（16）获取X射线衰减值的三维阵列。 使用滤波反投影方法重建二维图像切片，并且对图像进行校正以解决重建方法中的不准确以及由于锥形束几何形状而导致的不完整数据。

公开(公告)号：WO1997050054A1

公开(公告)日：1997-12-31

申请号：PCT/US1997010849

申请日：1997-06-23

Applicant: GENERAL ELECTRIC COMPANY

Inventor： GENERAL ELECTRIC COMPANY ,  HU, Hui

IPC: G06K09/00

CPC classification number: G06T11/006 ,  A61B6/027 ,  G01N23/046 ,  G01N2223/419 ,  G06T2211/421 ,  Y10S378/901

Abstract: A CT cone beam imaging system is provided wherein a source (12) of cone beam radiation and a detector array (16) are mounted for movement with respect to an object (10), to provide a reconstructed image of the object (10). Relative movement is established between the cone beam source (12) and the object (10) along a scan path comprising a circular component (26) and a linear component (34). To minimize processing requirements a subset of data elements is selected from the linear data set, wherein each of the selected data elements is associated with a set of spatial parameters which define spatial regions (18a) contained within a hypothetical sphere (18), the Radon space, but which are not intersected by a Radon shell. First and second sets of image reconstruction data are respectively generated from the subset of the linear data and the circular data and combined to provide an image of the object.

Abstract translation: 提供了一种CT锥形束成像系统，其中安装锥形束辐射源（12）和检测器阵列（16），以相对于物体（10）移动，以提供物体（10）的重建图像。 沿着包括圆形部件（26）和线性部件（34）的扫描路径在锥形束源（12）和物体（10）之间建立相对运动。 为了最小化处理要求，从线性数据集中选择数据元素的一个子集，其中所选择的数据元素中的每一个与定义包含在假想球体（18）内的空间区域（18a）的一组空间参数相关联，氡 空间，但不与氡壳相交。 分别从线性数据和圆形数据的子集生成第一和第二组图像重建数据，并组合以提供对象的图像。

公开(公告)号：WO1995012353A1

公开(公告)日：1995-05-11

申请号：PCT/US1993010568

申请日：1993-11-03

Applicant: GENERAL ELECTRIC COMPANY

Inventor： GENERAL ELECTRIC COMPANY ,  HU, Hui

IPC: A61B06/03

CPC classification number: G01T1/2985 ,  A61B6/027 ,  A61B6/032 ,  A61B6/4085 ,  G06T11/008

Abstract: An x-ray computed tomography system for helically scanning a patient, by translating the patient (42) as projections of the patient (42) at various beam angles are obtained, employs a detector array (16) having multiple rows displaced in along the direction of translation. The voxel attenuation valves reconstructed from the multiple rows are combined to produce an image having an improved beam profile in along the translation direction. A cone beam reconstruction method, which accounts for the divergence of the rays of a fan beam (40) of x-rays, and helical scanning is used to further improve the slice profile. The voxels may be selected so that they cluster closely about the position of the desired slice plane.

Abstract translation: 获得通过将患者（42）作为患者（42）的各种波束角的投影来平移扫描患者的X射线计算机断层摄影系统，使用具有沿着方向移位的多行的检测器阵列（16） 的翻译。 从多行重建的体素衰减阀被组合以产生沿着平移方向具有改进的射束轮廓的图像。 考虑到X射线的扇形光束（40）的射线的发散和螺旋扫描的锥束重建方法用于进一步改进切片轮廓。 可以选择体素使得它们围绕期望的切片平面的位置紧密地聚集。

公开(公告)号：EP0729320A1

公开(公告)日：1996-09-04

申请号：EP94902207.0

申请日：1993-11-03

Applicant: GENERAL ELECTRIC COMPANY

Inventor： HU, Hui

IPC: A61B6 ,  G01T1 ,  G06T1 ,  G06T11

CPC classification number: G01T1/2985 ,  A61B6/027 ,  A61B6/032 ,  A61B6/4085 ,  G06T11/008

Abstract: An x-ray computed tomography system for helically scanning a patient, by translating the patient (42) as projections of the patient (42) at various beam angles are obtained, employs a detector array (16) having multiple rows displaced in along the direction of translation. The voxel attenuation valves reconstructed from the multiple rows are combined to produce an image having an improved beam profile in along the translation direction. A cone beam reconstruction method, which accounts for the divergence of the rays of a fan beam (40) of x-rays, and helical scanning is used to further improve the slice profile. The voxels may be selected so that they cluster closely about the position of the desired slice plane.

公开(公告)号：EP0906059A2

公开(公告)日：1999-04-07

申请号：EP97949822.0

申请日：1997-12-04

Applicant: GENERAL ELECTRIC COMPANY

Inventor： HU, Hui

IPC: A61B6 ,  G06T1 ,  G06T11

CPC classification number: A61B6/032 ,  A61B6/027 ,  G06T11/005 ,  G06T2211/416 ,  G06T2211/432 ,  Y10S378/901

Abstract: In a computed tomography imaging system, wherein a longitudinally-unbounded object is oriented with respect to a source of cone beam radiation and a detector array, a method is provided for reconstructing an image of the longitudinally-unbounded object. Initially, relative movement between a longitudinally-unbounded object and the cone beam source is established along at least one circular scan path and at least one linear component. The cone beam is operated to irradiate measurable regions of the object while a prescribed orbit is traversed, to project an image of the longitudinally-unbounded object as cone beam data, onto the detector array. A scan field of view is defined, relative to the cone beam geometry. An error propagation distance in a Z direction is determined for the scan. The definition of the scan field of view is then modified, according to error propagation distance, and a set of image reconstruction data is generated, within the modified field of view, from the circular and linear scan paths.

公开(公告)号：EP1048008B1

公开(公告)日：2006-06-07

申请号：EP99962882.9

申请日：1999-11-23

Applicant: GENERAL ELECTRIC COMPANY

Inventor： HU, Hui ,  BUCHANAN, Robert, Alan ,  MITSA, Theophano

IPC: G06T7/00

CPC classification number: G06T7/0012

Abstract: The present invention, in one form, is a method for generating a calcification score in a CT image data using a scoring algorithm. In accordance with one embodiment of the algorithm, a calcium score is determined by identifying a scorable region in the image data, defining at least one region of interest in the scorable region, and determining a density score. After determining a calcium score for each region of interest, a total calcium score is determined. In addition, to correct for unequal and/or non-contiguous spacing of the slices of image data, a weighted total calcium score is determined.

公开(公告)号：EP1049406B1

公开(公告)日：2007-03-07

申请号：EP99961797.0

申请日：1999-11-23

Applicant: GENERAL ELECTRIC COMPANY

Inventor： HU, Hui ,  KINSINGER, Richard, E.

IPC: A61B6/03 ,  A61B6/00

CPC classification number: A61B6/541 ,  A61B5/0456 ,  A61B6/027 ,  A61B6/032

Abstract: An imaging system which, in one embodiment, includes a timing algorithm which identifies the proper projection data to be used and a modified halfscan image reconstruction algorithm which provides improved image quality along with the benefits of an enhanced temporal response, is described. In an exemplary embodiment, the timing algorithm includes the steps of determining a diastolic period of a patient's heart and corresponding projection data during the diastolic period. The modified halfscan algorithm includes the steps of identifying redundant data and unequally weighting the data. The resulting images are used for coronary calcification detection.

公开(公告)号：EP1049406A1

公开(公告)日：2000-11-08

申请号：EP99961797.0

申请日：1999-11-23

Applicant: GENERAL ELECTRIC COMPANY

Inventor： HU, Hui ,  KINSINGER, Richard, E.

IPC: A61B6/03 ,  A61B6/00

CPC classification number: A61B6/541 ,  A61B5/0456 ,  A61B6/027 ,  A61B6/032

Abstract: An imaging system which, in one embodiment, includes a timing algorithm which identifies the proper projection data to be used and a modified halfscan image reconstruction algorithm which provides improved image quality along with the benefits of an enhanced temporal response, is described. In an exemplary embodiment, the timing algorithm includes the steps of determining a diastolic period of a patient's heart and corresponding projection data during the diastolic period. The modified halfscan algorithm includes the steps of identifying redundant data and unequally weighting the data. The resulting images are used for coronary calcification detection.

公开(公告)号：EP1048008A1

公开(公告)日：2000-11-02

申请号：EP99962882.9

申请日：1999-11-23

Applicant: GENERAL ELECTRIC COMPANY

Inventor： HU, Hui ,  BUCHANAN, Robert, Alan ,  MITSA, Theophano

IPC: G06T7/00

CPC classification number: G06T7/0012

Abstract: The present invention, in one form, is a method for generating a calcification score in a CT image data using a scoring algorithm. In accordance with one embodiment of the algorithm, a calcium score is determined by identifying a scorable region in the image data, defining at least one region of interest in the scorable region, and determining a density score. After determining a calcium score for each region of interest, a total calcium score is determined. In addition, to correct for unequal and/or non-contiguous spacing of the slices of image data, a weighted total calcium score is determined.