｜ω｜滤波器对卷积滤波法进行非线性参量B／A成像的影响

The influence of |ω| filter function on nonlinear parameter imaging using filtered convolution method

非线性声参量Ｂ／Ａ是医学超声组织定征的一个新参量，利用Ｘ射线ＣＴ成像的算法──卷积滤波法可以对一个简单样品进行非线性参量Ｂ／Ａ计算机模拟成像。本文研究了四种｜ω｜滤波器，即ＲＬ滤波器，ＳＬ滤波器，抛物线滤波器和改进的ＳＬ滤波器，分析了它们对卷积滤波法非线性参量成像的图像质量的影响。

Acoustic nonlinearity parameter B/ A is a new important parameter in ultrasonic tissue characterization. The computer simulation of nonlinearity paramctCr B / A image for a simple liquid model can be obtained by using X-CT algorithm-fliered convolution method. In thes paper, four different filter functions, including RL, SL, Parabolic and Modi-SL, were used to reconstruct the B / A image. The influences of different filters on the quality of nonlinear parameter tomography have been compared and analyzed.