人体软组织微观结构的超声散射分析

Analytic proof of extended optic source coherence

分别利用ＡＲ倒谱和小波变换的方法，研究脾脏组织超声散射元的平均间距．结果表明，离体和在体情况下组织散射元的平均间距不同．ＡＲ倒谱和小波变换相结合是确定组织散射元间距的有效方法．

From the mechanism of the optic source irradiation, the coherence of extended optic source is analysed using Fourier analysis method and the principle of vibration superposition. It is proved that all extended optic sources are incoherent with each other, that the so called point optic source is actually a kind of idealized optic source and that obtaining coherent optic source is far more difficult than obtaining coherent mechanical wave source.