Multi-oriented windowed harmonic phase reconstruction for robust cardiac strain imaging.
Identifieur interne : 000031 ( Main/Exploration ); précédent : 000030; suivant : 000032Multi-oriented windowed harmonic phase reconstruction for robust cardiac strain imaging.
Auteurs : Lucilio Cordero-Grande [Royaume-Uni] ; Javier Royuela-Del-Val [Espagne] ; Santiago Sanz-Estébanez [Espagne] ; Marcos Martín-Fernández [Espagne] ; Carlos Alberola-L Pez [Espagne]Source :
- Medical image analysis [ 1361-8423 ] ; 2016.
Abstract
The purpose of this paper is to develop a method for direct estimation of the cardiac strain tensor by extending the harmonic phase reconstruction on tagged magnetic resonance images to obtain more precise and robust measurements. The extension relies on the reconstruction of the local phase of the image by means of the windowed Fourier transform and the acquisition of an overdetermined set of stripe orientations in order to avoid the phase interferences from structures outside the myocardium and the instabilities arising from the application of a gradient operator. Results have shown that increasing the number of acquired orientations provides a significant improvement in the reproducibility of the strain measurements and that the acquisition of an extended set of orientations also improves the reproducibility when compared with acquiring repeated samples from a smaller set of orientations. Additionally, biases in local phase estimation when using the original harmonic phase formulation are greatly diminished by the one here proposed. The ideas here presented allow the design of new methods for motion sensitive magnetic resonance imaging, which could simultaneously improve the resolution, robustness and accuracy of motion estimates.
DOI: 10.1016/j.media.2015.12.001
PubMed: 26745763
Affiliations:
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Electronic address: marcma@tel.uva.es.</nlm:affiliation><country xml:lang="fr">Espagne</country><wicri:regionArea>Laboratorio de Procesado de Imagen, Department of Teoría de la Señal y Comunicaciones e Ingeniería Telemática, ETSIT, Universidad de Valladolid, Campus Miguel Delibes s.n., 40011, Valladolid</wicri:regionArea><wicri:noRegion>Valladolid</wicri:noRegion></affiliation></author><author><name sortKey="Alberola L Pez, Carlos" sort="Alberola L Pez, Carlos" uniqKey="Alberola L Pez C" first="Carlos" last="Alberola-L Pez">Carlos Alberola-L Pez</name><affiliation wicri:level="1"><nlm:affiliation>Laboratorio de Procesado de Imagen, Department of Teoría de la Señal y Comunicaciones e Ingeniería Telemática, ETSIT, Universidad de Valladolid, Campus Miguel Delibes s.n., 40011, Valladolid, Spain. Electronic address: caralb@tel.uva.es.</nlm:affiliation><country xml:lang="fr">Espagne</country><wicri:regionArea>Laboratorio de Procesado de Imagen, Department of Teoría de la Señal y Comunicaciones e Ingeniería Telemática, ETSIT, Universidad de Valladolid, Campus Miguel Delibes s.n., 40011, Valladolid</wicri:regionArea><wicri:noRegion>Valladolid</wicri:noRegion></affiliation></author></analytic><series><title level="j">Medical image analysis</title><idno type="eISSN">1361-8423</idno><imprint><date when="2016" type="published">2016</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The purpose of this paper is to develop a method for direct estimation of the cardiac strain tensor by extending the harmonic phase reconstruction on tagged magnetic resonance images to obtain more precise and robust measurements. The extension relies on the reconstruction of the local phase of the image by means of the windowed Fourier transform and the acquisition of an overdetermined set of stripe orientations in order to avoid the phase interferences from structures outside the myocardium and the instabilities arising from the application of a gradient operator. Results have shown that increasing the number of acquired orientations provides a significant improvement in the reproducibility of the strain measurements and that the acquisition of an extended set of orientations also improves the reproducibility when compared with acquiring repeated samples from a smaller set of orientations. Additionally, biases in local phase estimation when using the original harmonic phase formulation are greatly diminished by the one here proposed. The ideas here presented allow the design of new methods for motion sensitive magnetic resonance imaging, which could simultaneously improve the resolution, robustness and accuracy of motion estimates.</div></front></TEI><affiliations><list><country><li>Espagne</li><li>Royaume-Uni</li></country><region><li>Angleterre</li><li>Grand Londres</li></region><settlement><li>Londres</li></settlement></list><tree><country name="Royaume-Uni"><region name="Angleterre"><name sortKey="Cordero Grande, Lucilio" sort="Cordero Grande, Lucilio" uniqKey="Cordero Grande L" first="Lucilio" last="Cordero-Grande">Lucilio Cordero-Grande</name></region></country><country name="Espagne"><noRegion><name sortKey="Royuela Del Val, Javier" sort="Royuela Del Val, Javier" uniqKey="Royuela Del Val J" first="Javier" last="Royuela-Del-Val">Javier Royuela-Del-Val</name></noRegion><name sortKey="Alberola L Pez, Carlos" sort="Alberola L Pez, Carlos" uniqKey="Alberola L Pez C" first="Carlos" last="Alberola-L Pez">Carlos Alberola-L Pez</name><name sortKey="Martin Fernandez, Marcos" sort="Martin Fernandez, Marcos" uniqKey="Martin Fernandez M" first="Marcos" last="Martín-Fernández">Marcos Martín-Fernández</name><name sortKey="Sanz Estebanez, Santiago" sort="Sanz Estebanez, Santiago" uniqKey="Sanz Estebanez S" first="Santiago" last="Sanz-Estébanez">Santiago Sanz-Estébanez</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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