[1] [1] D R Schwass, M V Swain, D G Purton, et al.. A system of calibrating microtomography for use in caries research [J]. Caries Res, 2009, 43(4): 314-321.

[2] [2] A Takeuchi, R Araki, S G Proskurin, et al.. A new method of bone tissue measurement based upon light scattering [J]. J Bone Mineral Res, 1997, 12(2): 261-266.

[3] [3] S E P Dowker, J C Elliott, G R Davis, et al.. Synchrotron X-ray microtomographic investigation of mineral concentrations at micrometre scale in sound and carious enamel [J]. Caries Res, 2004, 38(6): 514-522.

[4] [4] D M Cooper, J R Matyas, M A Katzenberg, et al.. Comparison of microcomputed tomographic and microradiographic measurements of cortical bone porosity [J]. Calcif Tissue Internat, 2004, 74(5): 437-447.

[5] [5] C R Parkinson, A Sasov. High-resolution non-destructive 3D interrogation of dentin using X-ray nanotomography [J]. Dent Mater, 2008, 24(6): 773-777.

[6] [6] Ma Jianjun, Li Dehua, Zhou Wei, et al.. Progress of terahertz pulse shaping techniques [J]. Laser & Optoelectronics Progress, 2012, 49(9): 090004.

[7] [7] A Hall, J M Girkin. A review of potential new diagnostic modalities for caries lesions [J]. J Dent Res, 2004, 83(suppl1): C89-C94.

[8] [8] N Ugryumova, S J Matcher, D P Attenburrow, et al.. Measurement of bone mineral density via light scattering [J]. Phys Med Biol, 2004, 49(3): 469-483.

[9] [9] Meng Zhuo, X Steve Yao, Yao Hui, et al.. Detecting early artificial caries by using optical coherence tomography [J]. Chinese J Lasers, 2010, 37(11): 2709-2713.

[10] [10] Yao Hui, Li Yanni, Wang Guanhua, et al.. Quantification detecting artificial early enamel caries with an ALL-fiber-OCT system [J]. Int J Biomed Eng, 2009, 32(2): 65-69.

[11] [11] D P Popescu, M G Sowa, M D Hewko, et al.. Assessment of early demineralization in teeth using the signal attenuation in optical coherence tomography images [J]. J Biomed Opt, 2008, 13(5): 054053.

[12] [12] F I Feldchtein, G V Gelikonov, V M Gelikonov, et al.. In vivo OCT imaging of hard and soft tissue of the oral cavity [J]. Opt Express, 1998, 3(6): 239-250.

[13] [13] T T Y Huang, A S Jones, L H He, et al.. Characterisation of enamel white spot lesions using X-ray micro-tomography [J]. J Dent, 2007, 35(9): 737-743.

[14] [14] J M Schmitt, R F Bonner. Measurement of optical properties of biological tissues by low-coherence reflectometry [J]. Appl Opt, 1993, 32(30): 6032-6042.

[15] [15] L Thrane, H T Yura, P E Andersen, et al.. Analysis of optical coherence tomography systems based on the extended Huygens Fresnel principle [J]. J Opt Soc Am A, 2000, 17(3): 484-490.

[16] [16] Ye Qing, Li Fuxin, Liu Yu, et al.. Dual-wavelength optical coherence tomography system [J]. Laser & Optoelectronics Progress, 2010,47(4): 041701.

[17] [17] M G Sowa, D P Popescu, J Werner, et al.. Precision of Raman depolarization and optical attenuation measurements of sound tooth enamel [J]. Anal Bioanal Chem, 2007, 387(5): 1613-1619.

[18] [18] C Robinson, R C Shore, S J Brookes, et al.. The chemistry of enamel caries [J]. Crit Rev Oral Biol Med, 2000, 11(4): 481-495