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    • 2. 发明申请
    • Method and apparatus for ultra fast symmetry and SIMD based projection-backprojection for 3D pet image reconstruction
    • 用于3D宠物图像重建的超快速对称和基于SIMD的投影反投影的方法和装置
    • US20070278410A1
    • 2007-12-06
    • US11800657
    • 2007-05-07
    • Zang ChoYoung KimCheol LeeIn HongSung ChungHang KimYoung Son
    • Zang ChoYoung KimCheol LeeIn HongSung ChungHang KimYoung Son
    • G06K9/00G01T1/164
    • G01T1/2985A61B6/037G06T11/003G06T11/006G06T2211/424
    • A method and apparatus are provided for reconstructing 3D image. The method may include the steps of: detecting a plurality of line of responses (LORs) emitted from an object; transforming the plurality of LORs into first sinogram data; back-projecting the first sinogram data with a plurality of projection angles to produce image data for the object; and projecting the produced image data with the plurality of projection angles to transform the image data into second sinogram data. The back-projecting may include filling pixels of image plane for each of the plurality of projection angles with the first sinogram data and rotating a coordinate axis of the image plane with corresponding projection angle to produce the image data. The projecting may include rotating the image data with corresponding projection angle in an opposite direction before projecting the image data with the plurality of projection angles. The projecting and the back-projecting may use symmetry properties in coordinate space.
    • 提供了一种重建3D图像的方法和装置。 该方法可以包括以下步骤:检测从对象发射的多条响应行(LOR); 将多个LOR转换成第一个正弦图数据; 以多个投影角度反投影第一正弦图数据以产生该对象的图像数据; 并且利用多个投影角度投影所生成的图像数据,以将图像数据转换成第二正弦图数据。 反投影可以包括用第一正弦图数据为多个投影角度中的每一个填充图像平面的像素,并且以相应的投影角旋转图像平面的坐标轴以产生图像数据。 投影可以包括在用多个投影角度投影图像数据之前以相反方向旋转具有相应投影角的图像数据。 投影和背投可以在坐标空间中使用对称性。