September 4, 2014 Journal article Closed Access

Jaouen, Vincent; González, Paulo; Stute, Simon; Guilloteau, Denis; Chalon, Sylvie; Buvat, Irène; Tauber, Clovis

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    <subfield code="a">&lt;p&gt;In this paper, we extend the gradient vector flow&lt;/p&gt;

&lt;p&gt;field for robust variational segmentation of vector-valued images.&lt;/p&gt;

&lt;p&gt;Rather than using scalar edge information, we define a vectorial&lt;/p&gt;

&lt;p&gt;edge map derived from a weighted local structure tensor of&lt;/p&gt;

&lt;p&gt;the image that enables the diffusion of the gradient vectors in&lt;/p&gt;

&lt;p&gt;accurate directions through the 4D gradient vector flow equation.&lt;/p&gt;

&lt;p&gt;To reduce the contribution of noise in the structure tensor,&lt;/p&gt;

&lt;p&gt;image channels are weighted according to a blind estimator of&lt;/p&gt;

&lt;p&gt;contrast. The method is applied to biological volume delineation&lt;/p&gt;

&lt;p&gt;in dynamic PET imaging, and validated on realistic Monte Carlo&lt;/p&gt;

&lt;p&gt;simulations of numerical phantoms as well as on real images.&lt;/p&gt;</subfield>
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    <subfield code="u">Université François-Rabelais de Tours, INSERM U930 Imaging and Brain, Tours 37032, France and Universidad Católica del Maule, Talca, Chile</subfield>
    <subfield code="a">González, Paulo</subfield>
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    <subfield code="u">Commissariat à l’énergie Atomique, Institut d’Imagerie Biomédicale, Service Hospitalier Frédéric Joliot, Orsay 91405, France</subfield>
    <subfield code="a">Stute, Simon</subfield>
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    <subfield code="a">Guilloteau, Denis</subfield>
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    <subfield code="a">Chalon, Sylvie</subfield>
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