The ultrasonic diagnostic device as the ultra wave is transmitted vis-a-vis the inspection body of the diagnostic object is something which diagnoses the organizational characteristics of the inspection body which is based on the ultra wave which is received by receiving the ultra wave which is reflected by the inspection body, it extracts the feature quantity of the frequency spectrum in the frequency spectrum which can by analyzing the ultrasonic frequency which is received the specified territory of the inspection body by closely resembling it uses with this feature quantity and the feature quantity of the frequency spectrum which is extracted on the basis of the ultra wave which is reflected from organizational characteristics and the said plural known inspection bodies of the plural known inspection bodiesOrganizational characteristics of the specified territory of the inspection body are decided due to especially.超音波診断装置は、診断対象の検体に対して超音波を送信するとともに検体によって反射された超音波を受信することにより、受信した超音波に基づく検体の組織性状を診断するものであり、受信した超音波の周波数を解析することによって得た周波数スペクトルを近似することによって検体の所定領域における周波数スペクトルの特徴量を抽出し、この特徴量と複数の既知検体の組織性状および該複数の既知検体から反射された超音波をもとに抽出された周波数スペクトルの特徴量とを用いることによって検体の所定領域の組織性状を判定する。
