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Prostate contours delineation using interactive directional active contours model and parametric shape prior model
Author(s) -
Derraz Foued,
Forzy Gérard,
Delebarre Arnaud,
TalebAhmed Abdelmalik,
Oussalah Mourad,
Peyrodie Laurent,
Verclytte Sebastien
Publication year - 2015
Publication title -
international journal for numerical methods in biomedical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.741
H-Index - 63
eISSN - 2040-7947
pISSN - 2040-7939
DOI - 10.1002/cnm.2726
Subject(s) - computer science , parametric statistics , artificial intelligence , piecewise , active shape model , computer vision , active contour model , process (computing) , pattern recognition (psychology) , image (mathematics) , image segmentation , mathematics , segmentation , operating system , mathematical analysis , statistics
Summary Prostate contours delineation on Magnetic Resonance (MR) images is a challenging and important task in medical imaging with applications of guiding biopsy, surgery and therapy. While a fully automated method is highly desired for this application, it can be a very difficult task due to the structure and surrounding tissues of the prostate gland. Traditional active contours‐based delineation algorithms are typically quite successful for piecewise constant images. Nevertheless, when MR images have diffuse edges or multiple similar objects (e.g. bladder close to prostate) within close proximity, such approaches have proven to be unsuccessful. In order to mitigate these problems, we proposed a new framework for bi‐stage contours delineation algorithm based on directional active contours (DAC) incorporating prior knowledge of the prostate shape. We first explicitly addressed the prostate contour delineation problem based on fast globally DAC that incorporates both statistical and parametric shape prior model. In doing so, we were able to exploit the global aspects of contour delineation problem by incorporating a user feedback in contours delineation process where it is shown that only a small amount of user input can sometimes resolve ambiguous scenarios raised by DAC. In addition, once the prostate contours have been delineated, a cost functional is designed to incorporate both user feedback interaction and the parametric shape prior model. Using data from publicly available prostate MR datasets, which includes several challenging clinical datasets, we highlighted the effectiveness and the capability of the proposed algorithm. Besides, the algorithm has been compared with several state‐of‐the‐art methods. Copyright © 2015 John Wiley & Sons, Ltd.

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