5Milan Sonka 等.Image Processing，Analysis， and Machine Vision[M].北京:人民邮电出版社,2002.95-102.
6[3]Oursler M J, Pederson L, Pyfferoen J, et al. Estrogen modulation of avian osteoclast lysosomal gene expression[J]. Endocrinology, 1993, 132:1 373-1 380.
7[4]Sievanen H, Kannus P, Nieminem V, et al. Estimation of various mechanical characteristics of human bone using dual-energy X-ray absorptionmetry meth-odology and precision[J].Bone, 1996, 18(Suppl):17-28.
8[6]Hansen M A,Hassager C,Overguard,et al.Dual-energy X-ray ab-sorptiometry:a precise method of measuring bone mineral density in the lumbar spine[J].J NuclMed,1990,31:1 156-1 162.
9[7]Johnson J,Dawson Hughes B.Presision and stability of Dual-energy x-ray absorptiometry measurements[J].Calcif Tissue Int,1991,49:174-178.
10[1]Lundon K, Grynpas M. The lone term effect of ovariectomy on the quality and quantity of cor tical bone in the young cynomolgus monkey: a comparison of density fractionation and histomorphometric techniques[J]. Bone, 1993, 14:389-395.
