| 摘要 |
<p>An ultrasonic diagnostic apparatus which detects a moving portion and a stationary portion in one and the same frame, selects suitable averaging coefficients for them so as to improve the ability to follow an image, and can offer sufficient noise removing performance. The apparatus comprises a frame memory for storing old data as reception signals most recently inputted, a weight function generator for determining difference data as an absolute value of the difference between new data as a reception signal inputted this time and old data read out from the frame memory for each pixel, and calculating 'φ' and 'φ-1' of the averaging coefficients as the weight functions of the new data or the old data and the difference data, a new data multiplier form multiplying the new data by the output data '1-φ' of the weight function generator for each pixel, and old data multiplier for multiplying the old data read out from the frame memory by the output data 'φ' of the weight function generator for each pixel, and an adder for adding the output data of the new data multiplier to the output data of the old data multiplier.</p> |
