| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an ultrasonic device having high azimuth resolution and a favorable image contrast ratio. <P>SOLUTION: The ultrasonic device is provided with an adaptive type signal processing block (007) and a fixed type signal processing block (006). The adaptive type signal processing block obtains a correlation matrix of a plurality of received electric signals, extracts a plurality of partial matrices from the correlation matrix, calculates a partial correlation matrix by averaging the plurality of partial matrices, determines a weight coefficient based on the partial correlation matrix, and produces a first intermediate signal by combining the plurality of received electric signals using the weight coefficient. The fixed type signal processing block produces a second intermediate signal by combining the plurality of received electric signals using a predetermined weight coefficient. A comparative combination processing block 008 compares and combines the first and second intermediate signals to produce an output signal. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
