Extended Finite Element Method with Simplified Spherical Harmonics Approximation for the Forward Model of Optical Molecular Imaging

<table> (a) Heterogeneous tissues. (b) Standard finite element mesh boundary conforms to the interface. (c) Enriched elements and nodes of XFEM “cut” by the interface.</table>

Computational and Mathematical Methods in Medicine

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Figure 1

Figure 1: Extended Finite Element Method with Simplified Spherical Harmonics Approximation for the Forward Model of Optical Molecular Imaging 