Speckle Noise Reduction Technique in medical Ultrasound Images Based on wavelet Thresholiding

Abstract

Today, ultrasound (us) is one of the most widely used imaging technologies in medicine .it is portable, free of radiation risk, and relatively inexpensive when compared with other imaging modalities. The ultrasound (us) b-scan images are obtained with simple linear or sector scan us probe, which show a granular appearance called speckle .this noise lead to the target delectability and recongnition and pathological tissue. The objective of this thesis is to give an overview about types of reduction techniques in ultrasound imaging, and to carry out comparative evaluation of despeckle filtering. Based on image quality evaluation matrix a new speckle suppression methods and coherence enhancement of medical ultrasound images were propsed.combines TV and wavelet decommmssion, it has been found the quality evaluation matrix the proposed method performs better than all other method while still retaining the structural details and experimental results show that this method retains the edge.