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Proceedings Paper

A method for registration and model-based segmentation of Doppler ultrasound images
Author(s): Hrvoje Kalinić; Sven Lončarić; Maja Čikeš M.D.; Davor Milicic M.D.; Ivo Čikeš M.D.; George Sutherland M.D.; Bart Bijnens
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Paper Abstract

Morphological changes of Doppler ultrasound images are an important source of information for diagnosis of cardiovascular diseases. Quantification of these flow profiles requires segmentation of the ultrasound images. In this article, we propose a new model-based method for segmentation of (aortic outflow) velocity profiles. The method is based on a procedure for registration using a geometric transformation specifically designed for matching Doppler ultrasound profiles. After manual segmentation of a model image, the model image is temporarily registered to a new image using two manually defined points in time. Next, a non-rigid registration was carried out in the velocity direction. As a similarfity measure normalized mutual information is used, while optimization is performed by a genetic algorithm. The registration method is experimentally validated using an in-silico image phantom, and showed an accuracy of 5.4%. The model based on segmentation is evaluated in a seris of aortic outflow Doppler ultrasound images from 30 normal volunteers. Comparing the automated method to the manual delineation by an expert cardiologist the method proved accurate to 6.6%. The experimental results confirm the accuracy of the approach and shows that the method can be used for the segmentation of the clinically obtained aortic outflow velocity profiles.

Paper Details

Date Published: 27 March 2009
PDF: 8 pages
Proc. SPIE 7259, Medical Imaging 2009: Image Processing, 72590S (27 March 2009); doi: 10.1117/12.811331
Show Author Affiliations
Hrvoje Kalinić, Univ. of Zagreb (Croatia)
Sven Lončarić, Univ. of Zagreb (Croatia)
Maja Čikeš M.D., Univ. Hospital Ctr. Rebro (Croatia)
Davor Milicic M.D., Univ. Hospital Ctr. Rebro (Croatia)
Ivo Čikeš M.D., Univ. Hospital Ctr. Rebro (Croatia)
George Sutherland M.D., St. George's Hospital (Spain)
Bart Bijnens, Univ. Pompeu Fabra (Spain)

Published in SPIE Proceedings Vol. 7259:
Medical Imaging 2009: Image Processing
Josien P. W. Pluim; Benoit M. Dawant, Editor(s)

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