公开(公告)号：US07269244B2

公开(公告)日：2007-09-11

申请号：US11339343

申请日：2006-01-25

申请人： Xiangyang Tang ,  Jiang Hsieh

发明人： Xiangyang Tang ,  Jiang Hsieh

IPC分类号： H05G1/60

CPC分类号： G06T11/006 ,  A61B6/027 ,  A61B6/032 ,  A61B6/4085 ,  Y10S378/901

摘要： A method includes performing a Cone Beam reconstruction of a thick image using a plurality of virtual planes.

公开(公告)号：US20070116172A1

公开(公告)日：2007-05-24

申请号：US11286924

申请日：2005-11-23

申请人： Jiang Hsieh ,  Darin Okerlund ,  Mark Woodford

发明人： Jiang Hsieh ,  Darin Okerlund ,  Mark Woodford

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

CPC分类号： G01N23/046 ,  A61B6/027 ,  A61B6/032 ,  A61B6/4233 ,  A61B6/488 ,  A61B6/5264 ,  A61B6/541 ,  A61B6/583 ,  G01N2223/419 ,  G01N2223/612 ,  G01N2223/66

摘要： In one embodiment, a method is provided for performing computed tomography (CT) imaging. The method includes obtaining EKG gating information from an object and obtaining attenuation measurements from the object utilizing a detector that is rotated in a scan plane around the object. The method further includes performing a first reconstruction based on a first portion of the attenuation measurements that are collected by a first region of the detector, where the first reconstruction is performed independent of the EKG gating information to obtain a first reconstruction data set. A second reconstruction is performed based on a second port of the attenuation measurements that are collected by a second region of the detector, where the second reconstruction is performed based on the EKG gating information to obtain a second reconstruction data set.

公开(公告)号：US20070110211A1

公开(公告)日：2007-05-17

申请号：US11273851

申请日：2005-11-15

申请人： Jiang Hsieh ,  Alexander Katsevich ,  Samit Basu

发明人： Jiang Hsieh ,  Alexander Katsevich ,  Samit Basu

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

CPC分类号： A61B6/032 ,  A61B6/027 ,  A61B6/06 ,  G21K1/04

摘要： Methods and systems for controlling x-ray exposure during a dynamic pitch helical scan using a translatable table are provided. The system includes a collimator positioned between an x-ray source and an object to be scanned configured to shutter an x-ray fan beam generated by the x-ray source to at least one of translate the x-ray fan beam along a z-axis of the scan and vary the width of the x-ray beam along the z-axis, and a collimator controller configured to dynamically position the collimator using at least one of predetermined trajectory of the translatable table and a current position of the translatable table.

摘要翻译： 提供了使用可平移表在动态俯仰螺旋扫描期间控制X射线曝光的方法和系统。 该系统包括准直器，该准直器定位在x射线源和要被扫描的物体之间，其被构造成将由x射线源产生的X射线扇形光束快门以将X射线扇形光束沿Z轴平移， 并且沿着z轴改变x射线束的宽度，以及准直器控制器，被配置为使用可平移台的预定轨迹和可平移表的当前位置中的至少一个来动态地定位准直器。

公开(公告)号：US07215734B2

公开(公告)日：2007-05-08

申请号：US10881794

申请日：2004-06-30

申请人： Jiang Hsieh ,  Xiangyang Tang

发明人： Jiang Hsieh ,  Xiangyang Tang

IPC分类号： A61B6/03

CPC分类号： G06T3/0043 ,  A61B6/027 ,  A61B6/032 ,  G06T11/005 ,  G06T2211/421

摘要： A method and system for three-dimensional reconstruction of images are provided. The method includes receiving projection data from an imaging device scanning an object, identifying projection data corresponding to a conjugate pair of projection rays, and interpolating the projection data corresponding to the conjugate pair of projection rays to reconstruct an image of the object being scanned.

摘要翻译： 提供了一种用于图像三维重建的方法和系统。 该方法包括：接收来自扫描对象的成像设备的投影数据，识别对应于投影射线的共轭对的投影数据，以及内插与投影光线的共轭对相对应的投影数据，以重建被扫描对象的图像。

公开(公告)号：US20070098133A1

公开(公告)日：2007-05-03

申请号：US11535657

申请日：2006-09-27

申请人： Guang-Hong Chen ,  Jiang Hsieh

发明人： Guang-Hong Chen ,  Jiang Hsieh

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

CPC分类号： G06T3/4076 ,  G06T11/006

摘要： The resolution of an image produced by a CT imaging system is increased by employing an image reconstruction method that takes advantage of the redundant attenuation measurements made during a typical scan. An initial image is reconstructed with a filtered backprojection technique using the projection views acquired during the scan. Further images of higher resolution are produced by an iterative process in which the reconstructed image is reprojected, combined with originally acquired projection data, and backprojected again at the higher resolution.

摘要翻译： 通过采用利用在典型扫描期间进行的冗余衰减测量的图像重建方法来增加由CT成像系统产生的图像的分辨率。 使用在扫描期间获取的投影视图，利用滤波反投影技术重建初始图像。 通过迭代过程产生更高分辨率的更多图像，其中重建图像被重新投射，与原始获取的投影数据组合，并以更高分辨率再次反投影。

公开(公告)号：US20060280283A1

公开(公告)日：2006-12-14

申请号：US11149993

申请日：2005-06-10

申请人： Jiang Hsieh ,  Jianying Li ,  Xiangyang Tang

发明人： Jiang Hsieh ,  Jianying Li ,  Xiangyang Tang

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

CPC分类号： A61B6/503 ,  A61B6/027 ,  A61B6/032 ,  A61B6/4085 ,  A61B6/541 ,  G06T11/005 ,  G06T2211/404 ,  G06T2211/412

摘要： The present invention is directed to a method and system of blending data acquired from neighboring partial-scans. Data is acquired from an imaging volume in a series of fractional or partial-scans. Each partial-scan samples a fraction of the imaging volume. During reconstruction, data from the partial-scans are combined to compensate for the unsampled portion of the imaging volume that is experienced in any partial-scan alone.

公开(公告)号：US20060257011A1

公开(公告)日：2006-11-16

申请号：US11126086

申请日：2005-05-10

申请人： Jianying Li ,  Jiang Hsieh

发明人： Jianying Li ,  Jiang Hsieh

IPC分类号： G06K9/00

CPC分类号： G06T5/002 ,  G06T5/20 ,  G06T11/005 ,  G06T2200/04 ,  G06T2207/10081 ,  G06T2207/10104 ,  G06T2207/10108 ,  G06T2207/30048

摘要： Methods and systems for filtering scan data are provided. The method includes generating scan data from a plurality of signals. The method further includes adjusting an initial filtering threshold, independent of an amplitude of the signals, to generate an adjusted threshold. Furthermore, the method includes filtering the scan data, based on the adjusted threshold.

摘要翻译： 提供了扫描数据过滤的方法和系统。 该方法包括从多个信号产生扫描数据。 该方法还包括调整独立于信号幅度的初始滤波阈值以产生经调整的阈值。 此外，该方法包括基于调整后的阈值对扫描数据进行滤波。

公开(公告)号：US07065179B2

公开(公告)日：2006-06-20

申请号：US10605943

申请日：2003-11-07

申请人： Wayne F. Block ,  J. Scott Price ,  Jiang Hsieh ,  Eric Chabin ,  Gorur N. Sridhar

发明人： Wayne F. Block ,  J. Scott Price ,  Jiang Hsieh ,  Eric Chabin ,  Gorur N. Sridhar

IPC分类号： H01J35/06 ,  H01J35/08 ,  H01G1/60

CPC分类号： H01J35/10 ,  H01J2235/068

摘要： An anode assembly having multiple target electrodes is disclosed. Each target electrode produces an x-ray fan beam for radiographic data acquisition. The target electrodes are designed to sequentially generate an x-ray fan beam and therefore operate at a proportional duty cycle per scan. Power output capabilities of the anode assembly is increased without an increase in the size or thermal overloading of the anode assembly.

摘要翻译： 公开了一种具有多个目标电极的阳极组件。 每个目标电极产生用于放射照相数据采集的x射线扇形束。 目标电极被设计成顺序地产生X射线扇形光束，因此以每次扫描的比例占空比工作。 增加阳极组件的功率输出能力而不增加阳极组件的尺寸或热过载。

公开(公告)号：US07054407B1

公开(公告)日：2006-05-30

申请号：US11053762

申请日：2005-02-08

申请人： Jianying Li ,  Jiang Hsieh

发明人： Jianying Li ,  Jiang Hsieh

IPC分类号： H05G1/26

CPC分类号： A61B6/032 ,  A61B6/4085 ,  A61B6/542

摘要： A methods and apparatus for reconstructing images are provided. The apparatus includes a CT imaging system configured to scan an anatomy to acquire path-length information, determine at least one threshold value using the acquired path length information, dynamically adjusting the threshold based on clinical applications and scan parameters, and perform a low signal correction on data obtained from scanning the anatomy using the determined threshold value.

摘要翻译： 提供了重建图像的方法和装置。 该装置包括CT成像系统，被配置为扫描解剖结构以获取路径长度信息，使用获取的路径长度信息确定至少一个阈值，基于临床应用和扫描参数动态调整阈值，并执行低信号校正 关于使用确定的阈值从解剖结构扫描获得的数据。

公开(公告)号：US20060083344A1

公开(公告)日：2006-04-20

申请号：US10966881

申请日：2004-10-15

申请人： Xiangyang Tang ,  Jiang Hsieh ,  Roy Arnulf Nilsen

发明人： Xiangyang Tang ,  Jiang Hsieh ,  Roy Arnulf Nilsen

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

CPC分类号： G06T11/006 ,  A61B6/027 ,  G06T2211/416 ,  G06T2211/421 ,  Y10S378/901

摘要： A method for reconstructing an image of an object utilizing a cone-beam volumetric computed tomographic imaging apparatus includes helically scanning the object with a radiation source utilizing the cone-beam volumetric computed tomographic imaging apparatus, selecting radiation beams emitted by the radiation source passing through a pixel P, a Tam-window, and a Katsevich window, filtering the selected projection data, and reconstructing an image of the object utilizing the filtered selected projection data including projection data within the Katsevich window and outside the Tam-window.