[1] [1] V. Ntziachristos, J. Ripoll, L. V. Wang, and R. Weissleder, Nat. Biotechnol. 23, 313 (2005).

[2] [2] G. Wang, W. Cong, Y. Li, W. Han, D. Kumar, X. Qian, H. Shen, M. Jiang, T. Zhou, J. Cheng, J. Tian, Y. Lv, H. Li, and J. Luo, Curr. Med. Imaging. Rev. 2, 453 (2006).

[3] [3] L. Jin, Y. Wu, J. Tian, H. Huang, and X. Qu, Chin. Opt. Lett. 7, 614 (2009).

[4] [4] C. Wilson and G. Adam, Med. Phys. 10, 824 (1983).

[5] [5] S. A. Prahl, M. Keijzer, S. L. Jacques, and A. J. Welch, Proc. SPIE IS 5, 102 (1989).

[6] [6] L. V. Wang, S. L. Jacques, and L. Q. Zheng, Comput. Meth. Prog. Bio. 47, 131 (1995).

[7] [7] D. A. Boas, J. Culver, J. Stott, and A. Dunn, Opt. Express 10, 159 (2002).

[8] [8] T. Binzoni, T. S. Leung, R. Giust, D. R¨ufenach, and A. H. Gandjbakhche, Comput. Meth. Prog. Bio. 89, 14 (2008).

[9] [9] E. Margallo-Balb′as and P. J. French, Opt. Express 15, 14086 (2007).

[10] [10] H. Li, J. Tian, F. Zhu, W. X. Cong, L. V. Wang, and G. Wang, Acad. Radiol. 11, 1029 (2004).

[11] [11] H. Shen and G. Wang, Phys. Med. Biol. 55, 947 (2010).

[12] [12] Q. Fang, Opt. Express 1, 165 (2007).

[13] [13] N. Ren, J. Liang, X. Qu, J. Li, B. Lu, and J. Tian, Opt. Express 18, 6811 (2010).

[14] [14] T. Moller, J. Graph. Tools 6, 29 (2001).

[15] [15] B. Dogdas, D. Stout, A. F. Chatziioannou, and R. M. Leahy, Phys. Med. Biol. 52, 577 (2007).