Ultrasonic diagnosis device

摘要: This invention provides a technology that freely changes the frequency of reference signal in digital ultrasonic diagnosis device and makes it possible to conduct various high-quality or high-speed imaging. Reception signals obtained by an element group disposed array are digitized sampling cycle higher than Nyquist reception signals, mixed with signal. The then accumulated direction, number being equal plurality samples, delayed added wave focusing means. serially read out used from memory means such manner as correspond signals. A train acquired which decreases gradually lapse time, transmission, alternately two having different frequencies, may be stored advance