[1] [1] F. Zhang and X. Feng, Chin. Comput. Med. Mag (in Chinese) 12, 429 (2006).

[2] [2] L. Sun, G. Wang, and J. Zhang, Appl. Opt. (in Chinese) 26, 4 (2005).

[3] [3] E. Pickwell, B. E. Cole, A. J. Fitzgerald, M. Pepper, and V. P. Wallace, Phys. Med. Biol. 49, 1595 (2004).

[4] [4] M.-A Brun, F. Formanek, A. Yasuda, M. Sekine, N. Ando, and Y. Eishii, Phys. Med. Biol. 55, 4615 (2010).

[5] [5] M. W. Ruth, E. C. Bryan, P. W. Vincent, J. P. Richard, D. A. Donald, H. L. Edmund, and P. J. Michael, Phys. Med. Biol. 47, 3853 (2002).

[6] [6] R. M. Woodward, V. P. Wallace, D. D. Arnone, E. H. L Linfield, and M. Pepper, J. Biol. Phys. 29, 257 (2003).

[7] [7] P. W. Vincent, F. T. Philip, J. F. Anthony, M. W. Ruth, C. Julian, J. P. Richard, and D. A. Donald, Faraday Discussions 126, 255 (2004).

[8] [8] P. W. Vincent. J. F. Anthony, P. Emma, J. P. Richard, F. T. Philip, F. Niamh, and H. Thomas, Appl. Spectrosc. 60, 1127 (2006).

[9] [9] J. F. Anthony, P. W. Vincent, B. Lynda, J. P. Richard, D. P. Anand, and D. A. Donald, Radiology 239, 533 (2006).

[10] [10] X.Wang andW.Wang, Acta Clinical Sonica (in Chinese) 20, 2248 (2008).

[11] [11] Y. Li, Y. Zheng, and W. Wang, Journal of Capital Normal University (Natural Science Edition) (in Chinese) 3, 28 (2007).

[12] [12] E. Pickwell and V. P. Wallace, J. Phys. D: Appl. Phys. R 39, 301 (2006).