28 April 2004 Multiresolution nonhomogeneous anisotropic diffusion approach to enhance ultrasound breast tumor image legibility
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Abstract
One factor used to tell if a tumor is benign or malignant is by examining the underlying structures of the tumor. In ultrasound images, these underlying structures are often buried in speckle noise. The proposed technique utilizes a median-anisotropic diffusion interactive algorithm to “dissolve” speckle noise and enhance images. This technique has two important differences from conventional anisotropic diffusion techniques. First, there is a two resolution level process, which converts the speckle to quasi-impulsive noise, making it more easily removable. Second, a median related reaction term is applied to the anisotropic diffusion equation, thus making it well suited for removing impulse type noise. In addition, the reaction term will make speckle reduction and image enhancement more adaptive to the local features in the image. The experimental data showed the proposed technique improved the legibility of the breast tumor images as important structures were emphasized.
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Zhi Yang, Zhi Yang, Martin D. Fox, Martin D. Fox, } "Multiresolution nonhomogeneous anisotropic diffusion approach to enhance ultrasound breast tumor image legibility", Proc. SPIE 5373, Medical Imaging 2004: Ultrasonic Imaging and Signal Processing, (28 April 2004); doi: 10.1117/12.536069; https://doi.org/10.1117/12.536069
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