Patent ID: 7608044

Claim:
An ultrasonic image display method for displaying a composite image made from a B mode image and a tissue velocity image of an object taken by means of an ultrasonic imaging system, said method comprising: receiving an echo receiver signal using a transceiver unit in response to ultrasound waves transmitted into the object by an ultrasonic probe, the echo receiver signal including a Doppler signal and a signal indicative of an intensity of echo at each reflection point on a sonic scan line; processing a tissue velocity data component of the Doppler signal using a Doppler processing unit in order to generate the tissue velocity image; decreasing a weight of the B mode image using a B mode processing unit while increasing a weight of the tissue velocity image in response to an increase of a brightness of the B mode image, the weight of the B mode image decreased based on a linear function when the brightness of the B mode image is less than a threshold and decreased based on at least one linear function when the brightness of the B mode image is greater than or equal to the threshold; adding the weighted B mode image and the tissue velocity image using an image processing unit coupled to the Doppler processing unit and the B mode processing unit in order to form a composite image that is expressed by RGB _Transparent= a — Ib*RGB — B +(1.0− a — Ib )* RGB _Color; and displaying the composite image using a composite image display unit coupled to the image processing unit.