针对自发荧光断层成像,提出了一种非截断小波有限元算法.该算法采用单元间非截断组合小波基来逼近未知函数,从理论上解决了二维和三维下复杂形状体的剖分,并成功地应用于自发荧光断层成像正向问题中圆柱和圆球仿体的研究.理论分析和数值仿真结果表明,与传统有限元的数值解相比,该算法在获得同样有效解的情况下减少了单元剖分数,降低了计算的复杂度.
In this paper, an algorithm named non-truncated wavelet finite element for bioluminescence tomography (BLT) is proposed. Using linear combination of non-truncated wavelet functions across the elements to approximate the unknown function, this algorithm is used in BLT forward problem in phantoms of cylinder and sphere successfully. Theoretical analysis and numerical simulations show that the computation accuracy by this algorithm is almost as good as that of finite element method (FEM), while the number of elements and computational complexity reduce greatlv compared with FEM.