Centre for Medical Image Computing, University College London, London, UK.
Opt Lett. 2011 Oct 15;36(20):4101-3. doi: 10.1364/OL.36.004101.
The boundary element method (BEM) is a useful tool in diffuse optical imaging (DOI) when modelling large optical regions whose parameters are piecewise constant, but are computationally expensive. We present here an acceleration technique, the single-level fast multipole method, for a highly lossy medium. The enhanced practicability of the BEM in DOI is demonstrated through test examples on single-layer problems, where order of magnitude reduction factors on solution time are achieved and on a realistic three-layer model of the neonatal head. Our experimental results agree very closely with theoretical predictions of computational complexity.
边界元法（BEM）在模拟具有分段常数参数的大光学区域的漫射光学成像（DOI）中是一种有用的工具，但计算成本很高。我们在这里提出了一种加速技术，即单层快速多极子方法，用于高度耗散介质。通过单层问题的测试示例，证明了 BEM 在 DOI 中的增强实用性，在这些示例中，实现了解决方案时间的数量级减少因子，并在新生儿头部的现实三层模型上进行了测试。我们的实验结果与计算复杂度的理论预测非常吻合。
