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41. 发明申请

US20060072800A1 Method and system for distributed iterative image reconstruction 审中-公开
标题翻译：分布式迭代图像重建方法与系统
公开(公告)号：US20060072800A1
公开(公告)日：2006-04-06
申请号：US10950780
申请日：2004-09-24
申请人： Bruno Bernard Deman , Samit Basu
发明人： Bruno Bernard Deman , Samit Basu
IPC分类号： G06K9/00
CPC分类号： G06T11/006 , G06T2211/424
摘要： A method for performing distributed statistical iterative reconstruction of an image volume using a computed tomography (CT) system is provided. The method comprises partitioning the image volume across one or more computing nodes. Each computing node receives a portion of measured sinogram data corresponding to a portion of the image volume. The method further comprises distributing a reconstruction operation of the image volume across the one or more computing nodes.
摘要翻译：提供了一种使用计算机断层摄影（CT）系统执行图像体积的分布式统计迭代重建的方法。该方法包括在一个或多个计算节点上划分图像体积。每个计算节点接收对应于图像体积的一部分的测量的正弦图数据的一部分。该方法还包括在一个或多个计算节点上分发图像卷的重构操作。

42. 发明申请

US20050105693A1 ITERATIVE CT RECONSTRUCTION METHOD USING MULTI-MODAL EDGE INFORMATION 失效
标题翻译：使用多模式边缘信息的迭代CT重建方法
公开(公告)号：US20050105693A1
公开(公告)日：2005-05-19
申请号：US10707031
申请日：2003-11-17
申请人： Qi Zhao , Chunhe Gong , Bruno De Man , Samit Basu , Francis Little
发明人： Qi Zhao , Chunhe Gong , Bruno De Man , Samit Basu , Francis Little
IPC分类号： G01N23/04 , G06T11/00 , H05G1/00
CPC分类号： G06T11/006 , G06T2211/424 , Y10S378/901
摘要： A computed tomography (CT) reconstruction method includes implementing an iterative image reconstruction process for CT metrology of an object, wherein the iterative reconstruction process utilizes accurate forward projection. During each of a plurality of iterations, a reconstructed image is constrained by utilizing prior outer edge information obtained from a modality in addition to CT, and then transformed to a projection domain so as to generate a calculated sinogram. A correction image is determined based on the calculated sinogram and a measured sinogram.
摘要翻译：计算机断层摄影（CT）重建方法包括对物体的CT计量实施迭代图像重建过程，其中迭代重建过程利用精确的向前投影。在多个迭代中的每个迭代期间，通过利用除了CT之外的从模态获得的先前的外部边缘信息来约束重建的图像，然后将其转换为投影域，以便产生计算的正弦图。基于计算的正弦图和测得的正弦图确定校正图像。

43. 发明授权

US06351548B1 Fast hierarchical reprojection algorithm for tomography 有权
标题翻译：用于断层扫描的快速层次重建算法
公开(公告)号：US06351548B1
公开(公告)日：2002-02-26
申请号：US09539073
申请日：2000-03-30
申请人： Samit Basu , Yoram Bresler
发明人： Samit Basu , Yoram Bresler
IPC分类号： G06K900
CPC分类号： G06T11/001 , G06T11/006 , G06T2211/424
摘要： A method for reprojecting images into sinograms includes the steps of dividing a two-dimensional image into sub-images as small as one pixel and reprojecting the sub-images at a smaller number of orientations to form subsinograms. These sub-sinograms are then successively aggregated and processed to form a full sinogram. The method uses two algorithms to aggregate the sub-sinograms. In one algorithm, the aggregation is exact, and in the other algorithm, aggregation is an approximation. The first algorithm is accurate, but relatively slow, and the second algorithm is faster, but less accurate. By performing some aggregations with the exact algorithm and some aggregations with the approximate algorithm, switching between the two algorithms in one of a number of suitable ways, an accurate result can be obtained quickly.
摘要翻译：用于将图像重新投影到正弦图中的方法包括以下步骤：将二维图像划分为小至一个像素的子图像，并以较小数目的取向重新投影子图像以形成亚谱图。然后将这些子图像连续地聚合并处理以形成完整的正弦图。该方法使用两种算法来聚合子图像。在一种算法中，聚合是精确的，而在另一种算法中，聚合是一种近似。第一种算法是准确的，但相对较慢，第二种算法更快，但不太准确。通过使用精确算法和一些具有近似算法的聚合来执行一些聚合，可以通过多种合适的方式之一来切换两种算法，可以快速获得准确的结果。

44. 发明授权

US06332035B1 Fast hierarchical reprojection algorithms for 3D radon transforms 有权
标题翻译：用于3D氡变换的快速分层重投影算法
公开(公告)号：US06332035B1
公开(公告)日：2001-12-18
申请号：US09669505
申请日：2000-09-25
申请人： Samit Basu , Yoram Bresler
发明人： Samit Basu , Yoram Bresler
IPC分类号： G06K900
CPC分类号： G06T11/006 , G06T11/001 , G06T2211/424
摘要： A method for reprojecting a 3D image into a 3D Radon sinogram includes the steps of dividing a three-dimensional image into sub-images as small as one voxel and reprojecting the sub-images at a smaller number of orientations to form subsinograms. These sub-sinograms are then successively aggregated and processed to form a full sinogram. The method uses two algorithms to aggregate the sub-sinograms. In one algorithm, the aggregation is exact, and in the other algorithm, aggregation is an approximation, and involves increasing the number of orientations by interpolation. The first algorithm is accurate, but relatively slow, and the second algorithm is faster, but less accurate. By performing some aggregations with the exact algorithm and some aggregations with the approximate algorithm, switching between the two algorithms in one of a number of suitable ways, an accurate result can be obtained quickly.
摘要翻译：将3D图像重新投影到3D氡正弦图中的方法包括以下步骤：将三维图像划分为像一个体素一样小的子图像，并以较小数量的取向重新投影子图像以形成亚谱图。然后将这些子图像连续地聚集并处理以形成完整的正弦图。该方法使用两种算法来聚合子图像。在一种算法中，聚合是精确的，而在另一种算法中，聚合是一种近似，并且涉及通过插值增加取向数。第一种算法是准确的，但相对较慢，第二种算法更快，但不太准确。通过使用精确算法和一些具有近似算法的聚合来执行一些聚合，可以通过多种合适的方式之一来切换两种算法，可以快速获得准确的结果。

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