%0 Journal Article
%T Segmentation of Breast Nodules on Ultrasonographic Images Based on Marke d-Controlled Watershed Transform
%A G¨®mez
%A W.
%A Leija
%A L.
%A Pereira
%A W. C. A.
%A Infantosi
%A A. F. C
%J Computaci¨®n y Sistemas
%D 2010
%I Instituto Polit¨¦cnico Nacional
%X in this article is presented a computerized segmentation method for breast nodules on ultrasonic images. with the goal of removing the speckle while preserving important information from the lesion boundaries, a gabor filter followed by an anisotropic diffusion filtering are applied to the ultrasonic image. furthermore, the marker-controlled watershed transform defines potential boundaries that maximize the average radial derivative function to get the final lesion contour. the segmentation procedure was applied on a database of 50 images and the computer-delineated margins were compared against manual outlines drawn by two radiologist. this comparison was performed by two metrics, which measure the similarity between two compared images: overlap ratio (or) and normalized residual value (nrv). if there is perfect agreement between both images or = 1 and nrv = 0. then, the mean values results, for each metric, were for the first radiologist: or = 0.87ˇŔ0.04 and nrv = 0.14ˇŔ0.06, and for the second radiologist: or = 0.86ˇŔ0.06 and nrv = 0.15ˇŔ0.05.
%K breast ultrasound
%K segmentation
%K watershed transform
%K average radial derivative.
%U http://www.scielo.org.mx/scielo.php?script=sci_abstract&pid=S1405-55462010000400007&lng=en&nrm=iso&tlng=en