A method for improving quality of an ultrasound image includes acquiring ultrasound sampled signals along scan lines, corresponding the ultrasound sampled signals along scan lines into a plurality of strong sampled signal blocks and weak sampled signal blocks, determining a line length of each edge line of a strong sampled signal region formed by the plurality of strong sampled signal blocks, partitioning edges of the strong sampled signal region into a plurality of L-shaped edges, determining a first central point corresponding to the line length of the first side of each L-shaped edge and a second central point corresponding to the line length of the second side of the each L-shaped edge, determining a triangle region corresponding to the each L-shaped edge, determining the triangle region as a strong signal triangle region or a weak signal triangle region, generating an amended strong sampled signal region accordingly.超音波影像之品質改善方法包含取得沿著掃描線之超音波取樣訊號。將超音波取樣訊號對應到複數個強訊號及弱訊號取樣區塊。決定該些強訊號取樣區塊所形成之強訊號取樣區域的各直線的邊緣長度。將強訊號取樣區域之邊緣區分為複數個L型邊緣。依據各邊緣長度決定每一個L型邊緣第一邊之第一中點以及第二邊之第二中點,決定每一個L型邊緣對應之三角形區域。決定三角形區域為強訊號三角形區域或弱訊號三角形區域。依據強訊號取樣區域、每一個強訊號三角形區域及每一個弱訊號三角形區域,產生修正後的強訊號取樣區域。S801至S810‧‧‧步驟
