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Abstract

Apparatus and method to clearly indicate a region in which a bubble based on therapeutic ultrasonic waves is occurring. A controller acquires reception signals based on an ultrasonic waves that have been transmitted from an ultrasonic probe at differing phases and timings, reflected by a biological tissue, and received by the ultrasonic probe. The controller adds the reception signals to generate a higher harmonic reception signal. The controller acquires a fundamental wave reception signal, which is one of the reception signals. The controller determines a comparison value which represents the difference between the value of the higher harmonic reception signal and the value of the fundamental wave reception signal. The controller determines, on the basis of the comparison value, whether a processing target pixel indicated by the higher harmonic reception signal or the fundamental wave reception signal indicates a cavitation region or a normal region.

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First Claim