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A confidence index weighted least squares filter for ultrasound displacement regularization

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5 Author(s)
Lingyun Huang ; Dept. of Bioeng., Univ. of Washington, Seattle, WA, USA ; Congxian Jia ; Chi-Hyung Seo ; Jinjun Xia
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Filtering estimated displacements is widely used in ultrasonic strain imaging. To minimize spatial resolution loses due to filtering, we propose an adaptive, weighted least squares filtering scheme driven by a confidence index indicating estimation quality. Compared to traditional, non adaptive median filtering, the variance of displacement estimation was reduced 61%. Moreover, this adaptive filtering scheme is particularly helpful in accumulating displacement and strain estimates.

Published in:

Ultrasonics Symposium (IUS), 2010 IEEE

Date of Conference:

11-14 Oct. 2010