We are studying methods to obtain information inside our body by using high-frequency sound waves, which cannot be heard by the human ear. At hospital, doctors frequently make a diagnosis by using ultrasonic diagnosis apparatuses. Our main goal is to establish the basis for next-generation diagnosis apparatuses, in addition to ultrasonic microscopes for diagnosing biological tissues with sound waves. Studying this field requires a broad knowledge of software and hardware, but it makes our study all the more interesting.