Shiina T, Ikeda K, Saito M
Med Prog Technol. 1987;12(3-4):185-95. doi: 10.1007/978-94-009-3361-3_16.
We propose a method of estimating two tissue parameters, that is, the reflection coefficient and attenuation coefficient from the reflected ultrasound for the purpose of improving the resolution of ultrasonic images and obtaining information on tissue characterization. The reflection coefficient is estimated by deconvolution technique using Kalman filter taking into account the distortion of the propagating pulse due to the frequency-dependent attenuation. The attenuation is estimated by adaptive processings based upon the criterion function calculated using estimates of the reflection coefficient. Simulated signals are used to investigate the ability of this method. Additionally, actual reflected signals from soft tissues are processed by the method. The results show that the method can be applied in clinical cases.
我们提出一种估计两个组织参数的方法，即从反射超声中估计反射系数和衰减系数，目的是提高超声图像的分辨率并获取组织特征信息。通过使用卡尔曼滤波器的反卷积技术来估计反射系数，该技术考虑了由于频率依赖性衰减导致的传播脉冲的失真。基于使用反射系数估计值计算的准则函数，通过自适应处理来估计衰减。使用模拟信号来研究该方法的能力。此外，用该方法处理来自软组织的实际反射信号。结果表明该方法可应用于临床病例。
