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1. 发明申请

US20070036418A1 Imaging system 有权
标题翻译：成像系统
公开(公告)号：US20070036418A1
公开(公告)日：2007-02-15
申请号：US11410594
申请日：2006-04-24
申请人： Xiaochuan Pan , Yu Zou , Lifeng Yu , Chien-Min Kao , Martin King , Maryellen Giger , Dan Xia , Howard Halpern , Charles Pelizzari , Emil Sidky , Seungryong Cho
发明人： Xiaochuan Pan , Yu Zou , Lifeng Yu , Chien-Min Kao , Martin King , Maryellen Giger , Dan Xia , Howard Halpern , Charles Pelizzari , Emil Sidky , Seungryong Cho
IPC分类号： G06K9/00
CPC分类号： G06T11/006 , A61B6/027 , A61B6/502 , A61B6/5288 , G06T2211/432 , G06T2211/436
摘要： A method and apparatus for reconstruction of a region of interest for an object is provided. The reconstruction of the object may be based on chords which may fill a part, all, or more than all of the region of interest. Using chords for reconstruction may allow for reducing data acquired and/or processing for reconstructing a substantially exact image of the ROI. Moreover, various methodologies may be used in reconstructing the image, such as backprojection-filtration, and modified filtration backprojection.
摘要翻译：提供了一种用于重建对象的感兴趣区域的方法和装置。对象的重建可以基于可以填充所有感兴趣区域的全部或全部的和弦。使用和弦进行重建可以允许减少获得的数据和/或用于重建ROI的基本上精确的图像的处理。此外，各种方法可用于重建图像，例如反投影过滤和修改过滤反投影。

2. 发明授权

US08605975B2 Image reconstruction from limited or incomplete data 有权
标题翻译：从有限或不完整的数据重建图像
公开(公告)号：US08605975B2
公开(公告)日：2013-12-10
申请号：US12223946
申请日：2007-02-12
申请人： Xiaochuan M. Pan , Emil Sidky , Chien-min Kao
发明人： Xiaochuan M. Pan , Emil Sidky , Chien-min Kao
IPC分类号： G06K9/00 , G06K9/46
CPC分类号： G06T11/006 , G06T11/005 , G06T2211/424 , G06T2211/432 , G06T2211/436
摘要： A system and method are provided for reconstructing images from limited or incomplete data, such as few view data or limited angle data or truncated data (including exterior and interior data) generated from divergent beams. In one aspect of the invention, the method and apparatus iteratively constrains the variation of an estimated image in order to reconstruct the image. As one example, a divergent beam maybe used to generate data (“actual data”). As discussed above, the actual data may be less than sufficient to exactly reconstruct the image by conventional techniques, such as FBP. In order to reconstruct an image, a first estimated image may be generated. Estimated data may be generated from the first estimated image, and compared with the actual data. The comparison of the estimated data with the actual data may include determining a difference between the estimated and actual data. The comparison may then be used to generate a new estimated image. For example, the first estimated image may be combined with an image generated from the difference data to generate a new estimated image. In order to generate the image for the next iteration, the variation of the new estimated image may be constrained. For example, the variation of the new estimated image may be at least partly constrained in order to lessen or reducing the total variation of the image.
摘要翻译：提供了一种系统和方法，用于从有限或不完整的数据重建图像，例如由发散光束产生的少量视图数据或有限角度数据或截断数据（包括外部和内部数据）。在本发明的一个方面，该方法和装置迭代地约束了估计图像的变化，以便重建图像。作为一个示例，可以使用发散光束来生成数据（“实际数据”）。如上所述，实际数据可能不足以通过诸如FBP的常规技术精确地重建图像。为了重建图像，可以生成第一估计图像。可以从第一估计图像生成估计数据，并与实际数据进行比较。估计数据与实际数据的比较可以包括确定估计数据和实际数据之间的差异。然后可以使用比较来生成新的估计图像。例如，第一估计图像可以与从差数据生成的图像组合以生成新的估计图像。为了生成用于下一次迭代的图像，新估计图像的变化可能受到约束。例如，新估计图像的变化可以至少部分地被限制，以便减少或减少图像的总变化。

3. 发明申请

US20110044546A1 Image Reconstruction From Limited or Incomplete Data 有权
标题翻译：数据有限或不完整的图像重建
公开(公告)号：US20110044546A1
公开(公告)日：2011-02-24
申请号：US12223946
申请日：2007-02-12
申请人： Xiaochuan M. Pan , Emil Sidky , Chien-min Kao
发明人： Xiaochuan M. Pan , Emil Sidky , Chien-min Kao
IPC分类号： G06K9/46
CPC分类号： G06T11/006 , G06T11/005 , G06T2211/424 , G06T2211/432 , G06T2211/436
摘要： A system and method are provided for reconstructing images from limited or incomplete data, such as few view data or limited angle data or truncated data (including exterior and interior data) generated from divergent beams. In one aspect of the invention, the method and apparatus iteratively constrains the variation of an estimated image in order to reconstruct the image. As one example, a divergent beam maybe used to generate data (“actual data”). As discussed above, the actual data may be less than sufficient to exactly reconstruct the image by conventional techniques, such as FBP. In order to reconstruct an image, a first estimated image may be generated. Estimated data may be generated from the first estimated image, and compared with the actual data. The comparison of the estimated data with the actual data may include determining a difference between the estimated and actual data. The comparison may then be used to generate a new estimated image. For example, the first estimated image may be combined with an image generated from the difference data to generate a new estimated image. In order to generate the image for the next iteration, the variation of the new estimated image may be constrained. For example, the variation of the new estimated image may be at least partly constrained in order to lessen or reducing the total variation of the image.
摘要翻译：提供了一种系统和方法，用于从有限或不完整的数据重建图像，例如由发散光束产生的少量视图数据或有限角度数据或截断数据（包括外部和内部数据）。在本发明的一个方面，该方法和装置迭代地约束了估计图像的变化，以便重建图像。作为一个示例，可以使用发散光束来生成数据（“实际数据”）。如上所述，实际数据可能不足以通过诸如FBP的常规技术精确地重建图像。为了重建图像，可以生成第一估计图像。可以从第一估计图像生成估计数据，并与实际数据进行比较。估计数据与实际数据的比较可以包括确定估计数据和实际数据之间的差异。然后可以使用比较来生成新的估计图像。例如，第一估计图像可以与从差数据生成的图像组合以生成新的估计图像。为了生成用于下一次迭代的图像，新估计图像的变化可能受到约束。例如，新估计图像的变化可以至少部分地被限制，以便减少或减少图像的总变化。

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