APPAREIL DE DIAGNOSTIC PAR ULTRASONS, PROCÉDÉ D'UTILISATION D'UN APPAREIL DE DIAGNOSTIC PAR ULTRASONS ET PROGRAMME D'UTILISATION D'UN APPAREIL DE DIAGNOSTIC PAR ULTRASONS
An ultrasound diagnosis apparatus according to the present invention includes a frequency analysis unit, a change rate calculation unit, and an attenuation rate estimation unit. The frequency analysis unit calculates a frequency spectrum of an ultrasound signal for each of reception depths by analyzing a frequency of the ultrasound signal. The change rate calculation unit calculates a second-order change rate of a frequency spectrum calculated by the frequency analysis unit or of a function defined by using the frequency spectrum by calculating a distance change rate and a frequency change rate on the frequency spectrum or on the function, in a predetermined order. The attenuation rate estimation unit estimates an attenuation rate per unit distance and per unit frequency, of the ultrasound signal in a predetermine region within a scanning region of the ultrasound transducer using the second-order change rate calculated by the change rate calculation unit.
