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一种射束与像素的快速遍历和求交算法

DOI: 10.11834/jig.20091006

Keywords: 图像重建,ART算法,遍历,求交,权因子

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Abstract:

针对ART(algebraicreconstructiontechnique)算法重建速度慢的问题,提出了一种射束与像素的快速遍历和求交算法。该算法通过一个距离参数来确定射束穿过的像素索引并计算出射束覆盖像素的面积,距离参数采用增量计算,因而运算效率很高。利用该算法在图像重建过程中实时计算权因子,不但节省了大量的内存空间,而且大大提高了图像重建的速度。实验结果表明,提出的算法非常有效,与传统方法相比取得了17倍以上的重建加速比。

References

[1]  Klaus Muller.Fast and Accurate Three-dimensional Reconstruction from Cone-beam Projection Data Using Algebraic Methods[D].OH,USA:Ohio State University,1998.
[2]  Klans Mueller,Roni Yagel.The weighted distance scheme:A globally optimizing projection ordering method for ART[J].IEEE Transactions on Medical Imaging,1997,16(2):1-14.
[3]  Herman G,Meyer L.Algebraic reconstruction can be made computationally efficient[J].IEEE Transactions on Medical Imaging,1993,12 (3):600-609.
[4]  Shepp L A,Logan B F.The Fourier reconstruction of a head section[J].IEEE Transactions on Nuclear Science,1974,21(1):21-43.
[5]  Sun Xiao-an,Chen Shu-zhen,Wu Zhi-bin,et al.Optimal method in image reconstruction[J].Journal of Image and Graphics,1999,4A(2):105-109.[孙晓安,陈淑珍,吴志斌等.图像重建中的最优化方法[J].中国图象图形学报.1999,4A(2):105-109.]
[6]  Liu Yuan,Zhang Ding-hua,Zhao Xin-bo,et al.A rapid parellel ART based on SIMD technology[J].Journal of Image and Graphics,2007,12(1):73-77.[刘远,张定华,赵歆波等.一种基于SIMD技术的快速并行代数重建算法[J].中国图象图形学报,2007,12(1):73-77.]
[7]  Guan H,Gordon R.A projection access order for speedy convergence of ART:A multilevel scheme for computed tomagraphy[J].Physics in Medicine and Bidogy,1994,39(1):2005-2022.
[8]  Qin Zhong-yuan,Mou Xuan-qin,Wang Ping,et al.A novel algebraic reconstruction technique of memory optimization and its fast implementation[J].Acta Electronics Sinica,2003,31(9):1327-1329.[秦中元,牟轩沁,王平等.一种内存优化的代数重建算法及其快速实现[J].电子学报,2003,31(9):1327-1329.]

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