Segmentation of ultrasonic images of the carotid

Authors:
Rui Rocha;Aurélio Campilho;Jorge Silva
Affiliations:
Laboratório de Sinal e Imagem Biomédica, INEB – Instituto de Engenharia Biomédica;Laboratório de Sinal e Imagem Biomédica, INEB – Instituto de Engenharia Biomédica;Laboratório de Sinal e Imagem Biomédica, INEB – Instituto de Engenharia Biomédica
Venue:
ICIAR'05 Proceedings of the Second international conference on Image Analysis and Recognition
Year:
2005

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Abstract

A new algorithm for an effective and automatic segmentation of the carotid wall in ultrasonic images is proposed. It combines the speed of thresholding algorithms with the accuracy, flexibility and robustness of a successful geometric active contour model which incorporates an optimal image segmentation model in a level set framework. Due to the multiphase nature of these images, a sequential minimum cross entropy thresholding is used to get a first approximation of the segments, reducing the problem to a two phase segmentation. This thresholding solution is then used as a starting point for a two phase piecewise constant version of a geometric active contour model to reduce noise, smooth contours, improve their position accuracy and close eventual gaps in the carotid wall.