Ultrasonic diagnostic apparatus, the working program of the working method and ultrasonic diagnostic apparatus of the ultrasound diagnostic apparatus

摘要

Ultrasonic diagnostic apparatus according to the present invention, a frequency analysis unit for calculating a frequency spectrum for each receiving depth of the ultrasonic signal by analyzing the frequency of the ultrasonic signal, the frequency spectrum or the frequency spectrum the frequency analysis section is calculated a change rate calculating section for calculating a second rate of change of the frequency spectrum or a function by calculating the distance change rate and a frequency change rate at a function in a predetermined order defined using a two rate of change calculator is calculated using the following rate of change; and a damping ratio estimating unit for estimating a unit distance and the attenuation rate per unit frequency of the ultrasonic signal in a predetermined region of the scanning region of the ultrasound transducer.