Acoustic Radiation Force Imaging(ARFI)is a novel method of tissue stiffness estimation. Compared with other conventional ultrasound methods, ARFI is quantitative and less operator dependent. However, current ARFI still cannot provide quasi-real-time 2D images since its algorithm is data-intensive and time-consuming. In order to obtain real-time2 D ARFI image, a new ARFI algorithm which is suitable for parallel computation on GPU is put forward and accomplished.According to the results, a high accelerate rat...