| 摘要 |
PURPOSE: To easily reduce a side lobe signal generating pseudo echoes despite of simple constitution in an ultrasonic diagnostic device. CONSTITUTION: An oscillator group 10 is divided into two receiving groups. Receiving signals are synthesized according to respective groups by a distributor 12 so as to be formed into two synthetic signals. An equalizer 18 equalizes the amplitudes of the two synthetic signals each other to the smaller one. The adder 20 adds the two synthetic signals whose amplitudes are equalized to each other. The genuine echo whose phase and time phase are accorded with each other is left, however, pseudo echoes whose phase and time phase are not accorded with each other are cancelled. |
