A New Approach For Denoising Ultrasonographic Images Using DTCWT

Ultrasound imaging is a non invasive, non destructive and low cost technique. It is used for imaging organs and soft tissue structures in human body. Medical images are corrupted by noise in their acquisition and transmission process. Ultrasound images are very noisy. In addition to the system noise, a significant noise source is the speckle phenomenon. Speckle is created by a complex interference of ultrasound echoes made by reflectors spaced closer together than the ultrasound system’s resolution limit. In this paper, an efficient method based on Dual Tree Complex Wavelet Transform (DTCWT) has been proposed to denoise the ultrasound images. Testing shall be made on a set of medical images. It is proposed that results achieved with DTCWT will be better than the other existing methods like Discrete Wavelet Transform (DWT).

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