Ultrasounic imaging based on coded exciting technology and adaptive beamforming

Compared with traditional imaging algorithm based on Delay and Sum (DAS), Capon algorithm can increase horizontal resolution of medical ultrasound image, but the contrast is not improved. A new algorithm named Chirp_Caopn is proposed in this paper, which combines ultrasound coded exciting technology with Capon algorithm, so the excellent relation of coded signal can remedy the common contrast of Capon algorithm. The simulated result shows that compared with Capon algorithm, the new algorithm not only improves the horizonta resolution, but also can give a high contrast image with less noise.