Methods and apparatus for detecting blood speckle in a display system of intravascular ultrasound imaging.

摘要

A method of distinguishing tissue from blood in an image of a blood vessel intravascular ultrasound, said method comprising the steps of: illuminating an intravascular target with ultrasonic RF energy to generate ultrasonic echoes from said intravascular target; transforming the ultrasonic echoes from the intravascular target in an RF reception signal; performing spectral analysis on at least a portion of said receive RF signal to provide intensity information on the spectrum of said received RF signal, said information including a first intensity strength at a high frequency within the spectrum indicated and a second intensity strength at a low frequency within the indicated range; comparing said first intensity strength and the second intensity strength indicated; determining that the intravascular target indicated is tissue if the first force indicated intensity and the second intensity strength mentioned are approximately equal and that said intravascular target is blood if the first intensity strength indicated is greater than the second force said intensity, wherein said determining step takes into account strength sensitivities backscattered tissue and blood in the said low and high frequencies.