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Ultrasound speckle reduction using adaptive wavelet thresholding

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Abstract

Ultrasound is the most widely used biomedical imaging modality for the purpose of diagnosis. It often comes with speckle that results in reduced quality of images by hiding fine details like edges and boundaries, as well as texture information. In this present study, a novel wavelet thresholding technique for despeckling of ultrasound images is proposed. For analysing performance of the method, it is first tested on synthetic (ground truth) images. Speckle noise with distinct noise levels (0.01–0.04) has been added to the synthetic images in order to examine its efficiency at different noise levels. The proposed technique is applied to various orthogonal and biorthogonal wavelet filters. It has been observed that Daubechies 1 gives the best results out of all wavelet filters. The proposed method is further applied on ultrasound images. Performance of the proposed technique has been validated by comparing it with some state-of-the-art techniques. The results have also been validated visually by the expert. Results reveal that the proposed technique outperforms other state-of-the-art techniques in terms of edge preservation and similarities in structures. Thus, the technique is effective in reducing speckle noise in addition to preserving texture information that can be used for further processing.

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  1. Department of Electronics and Communication Engineering, Dr. B. R. Ambedkar National Institute of Technology, Jalandhar, Jalandhar, India

    Anterpreet Kaur Bedi & Ramesh Kumar Sunkaria

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  1. Anterpreet Kaur Bedi
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  2. Ramesh Kumar Sunkaria
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Correspondence to Anterpreet Kaur Bedi.

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Bedi, A.K., Sunkaria, R.K. Ultrasound speckle reduction using adaptive wavelet thresholding. Multidim Syst Sign Process 33, 275–300 (2022). https://doi.org/10.1007/s11045-021-00799-4

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