The Research Laboratories

The Research Laboratories
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研究实验室

DOI:
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发表时间:
2015
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通讯作者:
G. Michaels
G. Michaels
中科院分区:
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文献类型:
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作者:
G. Michaels

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电子断层扫描可以在分子分辨率下阐明大型复杂生物标本的三维(3D)结构。为了实现这样的分辨率水平,必须使用大投影图像来计算3D重建。这种规模的层析重建需要大量的计算资源和相当长的处理时间。在这项工作中,我们提出并评估了一个矢量的方法,利用现代处理器中的多媒体扩展的快速3D重建。我们已经实现了标准的三维重建方法,加权反投影,使用流SIMD扩展(SSE),充分利用处理器的计算能力。我们已经评估了不同大小的几个数据集的层析重建的方法,并在一系列不同的计算平台。结果表明,矢量方法加快了约3倍的方法。所属单位:阿尔梅里亚大学
Electron tomography allows elucidation of the three-dimensional (3D) structure of large complex biological specimens at molecular resolution. In order to achieve such resolution levels, large projection images have to be used to compute the 3D reconstructions. Tomographic reconstruction on this scale requires an tremendous use of computational resources and considerable processing time. In this work, we present and evaluate a vector approach for fast 3D reconstruction that takes advantage of the multimedia extensions in modern processors. We have implemented the standard 3D reconstruction method, weighted backprojection, using the Streaming SIMD Extensions (SSE) to fully exploit the mputational capabilities of the processors. We have evaluated the method on tomographic reconstruction of several datasets of various sizes, and on a range of different computing platforms. The results show that the vector approach speeds up the method by a factor around 3. Affiliation: Universidad de Almería