A New Speckle Reduction Method of Medical Ultrasonic Image

There are inherent speckle noises in the medical ultrasound image. Speckle is multiplicative noise and the main reason to cause ultrasonic image degenerate. A new method of speckle reduction based on wavelet transform and soft threshold is presented and discussed. We compare our proposed technique with two existing speckle reduction methods. The results show that our method performances well not only in reducing the speckle noise but also in preserving the resolvable details. Finally, the prospect of the nonlinear filtering method is discussed.