Problem to be solved: to provide an ultrasonic diagnostic apparatus and an ultrasonic signal processing method in which distance resolution is improved, which can be realized by simple processing.A fundamental wave reflectivity estimator for estimating the reflectivity of ultrasonic waves and generating a fundamental wave reflectivity signal using a separation section separating a received signal into a reflected fundamental wave component and a reflected harmonic component, a predetermined waveform and a reflected fundamental wave component, and harmonic waveform and anti reflection A harmonic reflectivity estimator for estimating the ultrasonic reflectivity and generating a harmonic reflectivity signal using a harmonic component and a reflectivity combining part which synthesizes the fundamental wave reflectivity signal and the harmonic reflectivity signal to generate a reflectivity signal and an image based on the reflectivity signal RawAn image generating section is formed.Diagram【課題】単純な処理によって実現可能である、距離分解能を向上させた超音波診断装置および超音波信号処理方法を提供する。【解決手段】受信信号を、反射基本波成分と反射高調波成分とに分離する分離部と、所定の波形と反射基本波成分とを用いて、超音波反射率を推定し、基本波反射率信号を生成する基本波反射率推定部と、高調波波形と反射高調波成分とを用いて、超音波反射率を推定し、高調波反射率信号を生成する高調波反射率推定部と、基本波反射率信号と高調波反射率信号とを合成し反射率信号を生成する反射率合成部と、反射率信号に基づいて画像を生成する画像生成部とを備える。【選択図】図3
