| 摘要 |
PURPOSE:To improve the S/N of a color Doppler to a rate depth direction even when a black dropout, etc., is generated in data by adding respective pixel data of respective rates from a line memory at prescribed times and, further, dividing them at prescribed times. CONSTITUTION:When the data from a timer buffering memory 30 are read to a digital filter 8, data S1 at respective pixel points of respective rates of an ultrasonic raster M are inputted to an adder 41 of an adding circuit 31, pixel data N11, N12 and N 13 in the same rate are successively added by the adder 41, and a pixel counter 42 sends a rest signal S5 to the adder 41 at prescribed times 3 by means of a control signal S3 from a controller 32. Then, an added output N11+N12+N13 is outputted from the adder 41 to a 1/N circuit 43, the division is executed, and a mean output P11 (N11+N12+N13)/3 in a pixel point N1 is obtained. Since one pixel data are prepared in such a way, even when the black dropout of, for example, N12=0, N13=0, etc., are generated, P11 is made into N11/3, and the S/N of the color Doppler can be improved to the rate depth direction. |
