公开(公告)号：US20070058771A1

公开(公告)日：2007-03-15

申请号：US11224413

申请日：2005-09-12

申请人： Ken Sauer ,  Charles Bouman ,  Jiang Hsieh ,  Jean-Baptiste Thibault

发明人： Ken Sauer ,  Charles Bouman ,  Jiang Hsieh ,  Jean-Baptiste Thibault

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

CPC分类号： G06T11/005

摘要： A method for filtering a measurement of density of an object is described. The method includes filtering the measurement of the density and preserving a local average of the measurement and additional measurements when performing the filtering.

摘要翻译： 描述用于过滤物体密度测量的方法。 该方法包括过滤密度的测量并保持测量的局部平均值和执行滤波时的附加测量。

公开(公告)号：US07173996B2

公开(公告)日：2007-02-06

申请号：US10892931

申请日：2004-07-16

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

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

IPC分类号： G01N23/00

CPC分类号： G06T11/006 ,  A61B6/027 ,  A61B6/032 ,  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 having a smallest cone angle in comparison with that of the conjugate rays of the radiation beam; and reconstructing an image of the object utilizing projection data obtained from the selected radiation beams while avoiding the use of redundant projection data from unselected conjugate rays of the selected radiation beams.

摘要翻译： 使用锥束体积计算机断层成像装置重建物体的图像的方法包括利用锥束体积计算机断层摄影装置用辐射源螺旋扫描物体; 选择辐射源发射的辐射束，其通过与辐射束的共轭射线相比具有最小锥角的像素P; 以及使用从所选择的辐射束获得的投影数据来重建物体的图像，同时避免使用来自所选择的辐射束的未选择的共轭射线的冗余投影数据。

公开(公告)号：US20070019777A1

公开(公告)日：2007-01-25

申请号：US11185477

申请日：2005-07-20

申请人： Ken Sauer ,  Charles Bouman ,  Jiang Hsieh ,  Jean-Baptiste Thibault

发明人： Ken Sauer ,  Charles Bouman ,  Jiang Hsieh ,  Jean-Baptiste Thibault

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

CPC分类号： A61B6/032 ,  A61B6/027 ,  G06T11/006 ,  G06T2211/424 ,  Y10S378/901

摘要： A method of reconstructing an image includes combining a two-dimensional forward projection function and a three-dimensional stabilizing function to generate an iterative reconstruction algorithm, and using the obtained iterative reconstruction algorithm to perform a multislice Computed Tomography (CT) reconstruction to generate an image.

摘要翻译： 重建图像的方法包括组合二维向前投影函数和三维稳定函数以产生迭代重建算法，并且使用所获得的迭代重建算法来执行多层次计算机断层扫描（CT）重建以生成图像 。

公开(公告)号：US20060262893A1

公开(公告)日：2006-11-23

申请号：US11130769

申请日：2005-05-17

申请人： Xiangyang Tang ,  Jiang Hsieh

发明人： Xiangyang Tang ,  Jiang Hsieh

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

CPC分类号： G06T11/006 ,  A61B6/027 ,  A61B6/032 ,  A61B6/4085 ,  G06T2211/421

摘要： Methods and systems for generating images from a set of projection data acquired during a CT scan is provided. The system includes a computer programmed to utilize at least one of a cone angle dependent view weighting and an image plane dependent view weighting to generate an image.

公开(公告)号：US20060215891A1

公开(公告)日：2006-09-28

申请号：US11087264

申请日：2005-03-23

申请人： Jeffrey Fessler ,  Jiang Hsieh

发明人： Jeffrey Fessler ,  Jiang Hsieh

IPC分类号： G06K9/00 ,  G06K9/40

CPC分类号： G06T11/005 ,  G06T2211/424

摘要： A method and system for controlling image reconstruction in an imaging system are provided. The method includes receiving scan data from an imaging system, and determining regularization parameters for a plurality of portions of an image for reconstructing the image based on the received scan data, wherein the regularization parameters vary for the plurality of portions of the image.

公开(公告)号：US20060204065A1

公开(公告)日：2006-09-14

申请号：US11079355

申请日：2005-03-14

申请人： Jiang Hsieh ,  Paavana Sainath ,  James Madine ,  Charles Shaughnessy ,  Eugene Williams ,  Abdelaziz Ikhlef

发明人： Jiang Hsieh ,  Paavana Sainath ,  James Madine ,  Charles Shaughnessy ,  Eugene Williams ,  Abdelaziz Ikhlef

IPC分类号： G06K9/00

CPC分类号： G06T5/005 ,  A61B6/027 ,  G06T11/005 ,  G06T2207/10081 ,  G06T2207/30004

摘要： Methods and systems for scanning a patient by using a medical imaging device are provided. The methods include determining a defective cell in a row n of a detector of the medical imaging device, determining a mode of operation of the medical imaging device, estimating the output of the defective cell using the determined mode of operation and at least one of a conjugate sample of the defective cell, an adjusted conjugate sample of the defective cell, and an estimate of the output of the defective cell using an output of a corresponding cell in an adjacent row and reconstructing an image of the patient using the estimated value of the defective cell.

公开(公告)号：US20060104536A1

公开(公告)日：2006-05-18

申请号：US10990921

申请日：2004-11-17

申请人： Jiang Hsieh ,  Charles Bouman ,  Ken Sauer ,  Jean-Baptiste Thibault

发明人： Jiang Hsieh ,  Charles Bouman ,  Ken Sauer ,  Jean-Baptiste Thibault

IPC分类号： G06K9/40 ,  G06K9/00

CPC分类号： G06T7/0004 ,  A61B6/027

摘要： A method for improving images of an imaging system including a plurality of detector cells includes assigning a quality factor for each detector cell.

摘要翻译： 一种用于改善包括多个检测器单元的成像系统的图像的方法包括分配每个检测器单元的品质因数。

公开(公告)号：US20060104410A1

公开(公告)日：2006-05-18

申请号：US10991177

申请日：2004-11-17

申请人： Ken Sauer ,  Jean-Baptiste Thibault ,  Charles Bouman ,  Jiang Hsieh

发明人： Ken Sauer ,  Jean-Baptiste Thibault ,  Charles Bouman ,  Jiang Hsieh

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

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

摘要： A method of reconstructing an image includes performing an iterative CT X-ray image reconstruction using a model including a point spread function (PSF) to reconstruct an image.

摘要翻译： 重建图像的方法包括使用包括点扩展函数（PSF）的模型来执行迭代CT X射线图像重建以重建图像。

公开(公告)号：US20060020200A1

公开(公告)日：2006-01-26

申请号：US10887489

申请日：2004-07-08

申请人： Joshua Medow ,  Charles Mistretta ,  Ranjini Tolakanahalli ,  Jiang Hsieh

发明人： Joshua Medow ,  Charles Mistretta ,  Ranjini Tolakanahalli ,  Jiang Hsieh

IPC分类号： A61B5/05

CPC分类号： A61B6/032 ,  A61B6/027 ,  A61B6/4085 ,  A61B6/481 ,  A61B6/504 ,  G06T11/005 ,  G06T2211/404

摘要： A helical scan is performed with a fan beam or cone beam CT system to acquire a first set of sinogram data sets. The subject is injected with a contrast agent and the identical helical scan is performed to acquire a second set of sinogram data sets. Corresponding projection views are subtracted in the two data sets and a number of different images are reconstructed from the difference data set. One image is a tomographic image produced using a filtered backprojection method and a second image is a topograph produced by selecting and displaying projection views acquired at the same view angle in successive sinogram data sets.

摘要翻译： 用扇形束或锥形束CT系统执行螺旋扫描以获取第一组正弦图数据集。 对象被注入造影剂，并执行相同的螺旋扫描以获取第二组正弦图数据集。 在两个数据集中减去对应的投影视图，并从差异数据集中重建多个不同的图像。 一个图像是使用滤波反投影方法产生的断层图像，并且第二图像是通过在连续的正弦图数据集中选择和显示以相同视角采集的投影视图而产生的地形图。

公开(公告)号：US20060018439A1

公开(公告)日：2006-01-26

申请号：US10895704

申请日：2004-07-21

申请人： Xiangyang Tang ,  Jiang Hsieh ,  Sandeep Dutta ,  Roy Helge Nilsen

发明人： Xiangyang Tang ,  Jiang Hsieh ,  Sandeep Dutta ,  Roy Helge Nilsen

IPC分类号： H05G1/00

CPC分类号： A61B6/032 ,  A61B6/027 ,  A61B6/583 ,  G06T11/005

摘要： A method for producing an image of an object includes scanning an object with an imaging apparatus to collect projection data of the object utilizing cone sampling. The projection data is rebinned in a row-wise, fan-to-parallel fashion to produce rebinned data and the rebinned data is view-weighted to produce view-weighted data. The method further includes filtering the view-weighted data utilizing a row-wise ramp filter to produce filtered data and generating an image of the object utilizing the filtered data and a three-dimensional (3D) backprojection.