Patent ID: 6638224
Filing Date: 2003-10-28
Classification: A61B,G01S

Abstract:
An echo image forming apparatus adapted to distinguish an echo from a scattered echo which creates a speckle pattern in an image, comprising:a wave transmitter for transmitting an observation wave pulse of a wide band; a wave receiver for receiving an echo of the observation wave pulse to generate a reception signal; a filter for extracting sign components of a plurality of different frequencies predetermined from the reception signal obtained by the wave receiver; and a display device for imaging respectively the signal components of each frequency extracted by the filter and displaying images corresponding to resultant frequencies mutually relating to each other, wherein the display device assigns a different color to the signal components of different frequency to display the obtained images of the colors by overlaying, and wherein the display device modulates the overlayed image obtained from the signal of each frequency by intensity of the reception signal as it is obtained by the wave receiver to display, thereby allowing an obtained image of a scattered echo to be distinguished from an obtained image of an echo.