A method of calibrating ultrasound velocity comprising receiving an ultrasound non-delayed data set generating a plurality of aperture images by processing a beam-forming process to the ultrasound non-delayed data set at a plurality of velocities finding out velocity which the aperture images are respond to and the aperture images which two apertures are respond to at a Mean Absolute Error(MAE) range by executing a MAE process selecting a first aperture and a second aperture then generating a first aperture image and a second aperture image at the responded velocity generating a image error corresponding figure including an error curve finding out a trend curve according to the error curve finding out a MAE value lowest point and a responding velocity which the MAE value lowest point is respond to at the trend curve to calibrate the ultrasound velocity.一種超音波聲速校正方法,其包含接收一超音波未延遲資料集;以複數個聲速對超音波未延遲資料集進行波束形成處理以產生複數個孔徑影像;利用平均絕對誤差(Mean Absolute Error;MAE)處理,找出在MAE範圍中所對應之聲速與所對應該些孔徑影像中之二者;選定第一與第二子孔徑,以所對應之聲速產生第一與第二孔徑影像;對第一與第二孔徑影像進行MAE處理以產生具有誤差曲線之影像誤差對應圖;利用誤差曲線找出一趨勢曲線;找出趨勢曲線中之MAE值最低點與其所對應該些聲速中之一者,藉以校正出超音波聲速。
