Voxels ' intensities are relative to values of voxels ' property, for example, the amplitude and coefficient. 数据体中体素的亮度与此体素的属性值有关,如振幅值和相干系数。
According to the least-square method, the relative transmission distance curve about the amplitude logarithm with the propagation distance was obtained. The corresponding attenuation coefficient was calculated. 根据最小二乘法拟合得到了振幅的对数相对传播距离的回归曲线,并计算出了该频率下的衰减系数。
The results show that the method can reduce the effects of the relative amplitude and phase between two sources on the system, obviously improve the localization precision, and detect the heterogeneity with smaller size, deeper and smaller absorption coefficient. 结果表明:新方法可减小相对幅度和相位及异质子参量对系统的影响,明显地提高定位精度,探测到尺度和吸收系数更小、深度更深的异质子。