| 摘要 |
The present invention provides an ultrasonic imaging device which narrows the width of annular areas to be established, without increasing the number of channels, thereby enabling enhancement of a focused sound pressure. The controller establishes the annular areas 421 to 42p the number of which is larger than the number of signal lines, along the line intersections between the wave surfaces 51 to 54 of reflective waves and a two-dimensional surface of the probe 1. The controller selects multiple annular areas (0, 0), (0, 1), and (0, 2) with focal depths differing by an integral multiple of the ultrasonic wavelengthλ, out of the multiple annular areas being established, and connects the transducer elements positioned within the selected multiple annular areas with an identical signal line. Accordingly, the received signals from the selected multiple annular areas arrive at multiple time points shifted by the time corresponding to the wavelength, and the signals do not cancel one another out. Furthermore, the annular areas the number of which is larger than the number of signal lines can be established, thereby narrowing the width of the annular areas.
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