[1] [1] D. R. Leff, O. J. Warren, L. C. Enfield, A. Gibson, T. Athanasiou, D. K. Patten, J. Hebden, G. Z. Yang, and A. Darzi, Breast Cancer Res. Treat. 108, 9 (2008).

[2] [2] L. C. Enfield, A. P. Gibson, N. L. Everdell, D. T. Delpy, M. Schweiger, S. R. Arridge, C. Richardson, M. Keshtgar, M. Douek, and J. C. Hebden, Appl. Opt. 46, 3628 (2007).

[3] [3] Q. Zhang, T. J. Brukilacchio, A. Li, J. J. Stott, T. Chaves, E. Hillman, T. Wu, M. Chorlton, E. Rafferty, R. H. Moore, D. B. Kopans, and D. A. Boas, J. Biomed. Opt. 10, 024033 (2005).

[4] [4] A. P. Gibson, J. C. Hebden, and S. R. Arridge, Phys. Med. Biol. 50, R1 (2005).

[5] [5] F. Gao, Y. Xue, H. Zhao, T. Kusaka, M. Ueno, and Y. Yamada, Chin. Opt. Lett. 5, 472 (2007).

[6] [6] F. Yang, Y. Ma, F. Gao, and H. Zhao, Acta Opt. Sin. (in Chinese) 28, 1571 (2008).

[7] [7] A. R. Zirak and M. Khademi, Opt. Commun. 279, 273 (2007).

[8] [8] H. Zhao, F. Gao, Y. Tanikawa, and Y. Yamada, J. Biomed. Opt. 12, 062107 (2007).

[9] [9] F. Gao, H. Zhao, Y. Tanikawa, and Y. Yamada, Ieice Trans. Inf. & Syst. E85, 133 (2002).

[10] [10] S. R. Arridge, Inverse Probl. 15, R41 (1999).

[11] [11] T. Durduran, R. Choe, J. P. Culver, L. Zubkov, M. J. Holboke, J. Giammarco, B. Chance, and A. G. Yodh, Phys. Med. Biol. 47, 2847 (2002).

[12] [12] K. Xu, F. Gao, and H. zhao, Biomedical Photonics (in Chinese) (Science Press, Beijing, 2007).