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1. 发明授权

US6163617A Backprojection with a multi-color rendering engine 失效
标题翻译：使用多色渲染引擎进行反投影
公开(公告)号：US6163617A
公开(公告)日：2000-12-19
申请号：US193826
申请日：1998-11-17
申请人： Dominic J. Heuscher , David D. Matthews
发明人： Dominic J. Heuscher , David D. Matthews
IPC分类号： H04N7/18 , A61B6/03 , G06T1/00 , G06T11/00 , G06K9/00
CPC分类号： G06T11/006 , A61B6/027 , G06T2211/421
摘要： A method of diagnostic image reconstruction from projection data is provided. It includes generating projection data followed by a convolution of the same. The convolved projection data is then scaled into unsigned, fixed precision words of a predetermined number of bits. The words are then split into a predetermined number of color channels corresponding to color channels of a multi-color rendering engine (150). Simultaneously and independently, the split words are backprojected along each of the color channels to obtain backprojected views for each color channel. The backprojected views for each color channel are accumulated to produce separate color images corresponding to each color channel. Finally, the separate color images are recombined to produce an output image. In a preferred embodiment, prior to the convolution of the projection data, a rebinning operation is performed to ensure that the projection data is in a parallel format. In addition, after convolving the projection data, a selective pre-interpolating step of linear or higher order is optionally performed on the projection data.
摘要翻译：提供了一种从投影数据进行诊断图像重建的方法。它包括产生投影数据，随后是卷积。然后将卷积的投影数据缩放成预定位数的无符号固定精度字。然后将这些单词分割成与多色渲染引擎（150）的颜色通道对应的预定数量的颜色通道。同时独立地，分割词沿着每个颜色通道反向投影，以获得每个颜色通道的反投影视图。累积每个颜色通道的反投影视图以产生对应于每个颜色通道的分开的彩色图像。最后，分离的彩色图像被重组以产生输出图像。在优选实施例中，在投影数据的卷积之前，执行重新归类操作以确保投影数据是并行格式。此外，在卷积投影数据之后，可选地对投影数据执行线性或更高阶的选择性预插值步骤。

2. 发明授权

US07058440B2 Dynamic computed tomography imaging using positional state modeling 失效
标题翻译：使用位置状态建模的动态计算机断层成像
公开(公告)号：US07058440B2
公开(公告)日：2006-06-06
申请号：US10179487
申请日：2002-06-25
申请人： Dominic J. Heuscher , Shiying Zhao , David D. Matthews , Ge Wang
发明人： Dominic J. Heuscher , Shiying Zhao , David D. Matthews , Ge Wang
IPC分类号： A61B5/05
CPC分类号： A61B6/541 , A61B5/0456 , A61B5/7289 , A61B6/027 , A61B6/032 , A61B6/4085 , A61B6/5247 , A61B6/583 , A61B8/08 , A61B8/4416
摘要： An apparatus for computed tomography (CT) imaging of a cyclically moving organ includes a positional state monitor (24, 40) that monitors a positional state of the cyclically moving organ such as the heart. A cone-beam CT scanner (10) acquires image data at least within a plurality of time windows. Each time window is centered about an occurrence of a selected positional state of the organ. A window analyzer (38) selects a data segment within each time window such that the data segments combine to form a complete data set covering a selected angular range. A reconstruction processor (44) reconstructs the selected data segments into an image representation.
摘要翻译：循环运动器官的计算机断层摄影（CT）成像装置包括监视诸如心脏的循环移动器官的位置状态的位置状态监视器（24,40）。锥束CT扫描器（10）至少在多个时间窗口内获取图像数据。每个时间窗口以器官的选定位置状态的出现为中心。窗口分析器（38）选择每个时间窗内的数据段，使得数据段组合以形成覆盖所选角度范围的完整数据集。重建处理器（44）将所选择的数据段重建为图像表示。

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