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Phase-Based Level Set Segmentation of Ultrasound Images

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4 Author(s)
Belaid, A. ; Centre de Rech. de Royallieu, Univ. de Technol. de Compiegne, Compiègne, France ; Boukerroui, D. ; Maingourd, Y. ; Lerallut, J.-F.

Ultrasonic image segmentation is a difficult problem due to speckle noise, low contrast, and local changes of intensity. Intensity-based methods do not perform particularly well on ultrasound images. However, it has been previously shown that these images respond well to local phase-based methods which are theoretically intensity invariant. Here, we use level set propagation to capture the left ventricle boundaries. The proposed approach uses a new speed term based on local phase and local orientation derived from the monogenic signal, which makes the algorithm robust to attenuation artifact. Furthermore, we use Cauchy kernels, as a better alternative to the commonly used log-Gabor, as pair of quadrature filters for the feature extraction. Results on synthetic and natural data show that the proposed method can robustly handle noise, and captures well the low contrast boundaries.

Published in:

Information Technology in Biomedicine, IEEE Transactions on  (Volume:15 ,  Issue: 1 )

Date of Publication:

Jan. 2011

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