Guillaume Zahnd
Telecommunications Engineer (INSA-Lyon 2007)
PhD student @ CREATIS, Lyon, France
ultrasound imaging research team
guillaume.zahnd[at]creatis.insa-lyon.fr
PhD topic
2D real-time joint estimation of blood vector flow and vessel wall tracking with ultrasound imaging
Cardiovascular diseases, especially atherosclerosis, are responsible of one-third of deaths throughout the world, and represent the principal cause of mortality and morbidity in industrialized countries. During the atherosclerosis process, significant changes of the mechanical properties of the vessel wall may occur before the anatomical changes become visible. Early detection of this pathology is therefore an important issue.
A novel approach to estimate the 2D trajectory of the arterial walls, in ultrasound B-mode image sequences of the common carotid artery in vivo is proposed. This user-independent method is based on both segmentation and speckle tracking.
Publications
Journal articles
Zahnd G, Vray D, Sérusclat A, Alibay D, Bartold M, Brown A, Durand M, Jamieson LM, Kapellas K, Maple-Brown LJ, O'Dea K, Moulin P, Celermajer DS, Skilton MR. "Longitudinal displacement of the carotid wall and cardiovascular risk factors: associations with aging, adiposity, blood pressure and periodontal disease independent of cross-sectional distensibility and intima-media thickness." Ultrasound in Medecine & Biology, 2012. in press
Zahnd G, Boussel L, Marion A, Durand M, Moulin P, Sérusclat A, Vray D. "Measurement of two-dimensional movement parameters of the carotid artery wall for early detection of arteriosclerosis: a preliminary clinical study." Ultrasound in Medecine & Biology, vol. 37, no. 9, pp. 1421-1429, 2011.
International conferences with proceedings
Zahnd G, Boussel L, Sérusclat A, Vray D. "Intramural shear strain can highlight the presence of atherosclerosis: a clinical in vivo study." IEEE Ultrasonics Symposium, Orlando, Florida (USA), pp. 1770-1773, 2011.
Zahnd G, Orkisz M, Sérusclat A, Vray D. "Minimal-path contours combined with speckle tracking to estimate 2D displacements of the carotid artery wall in B-mode imaging." IEEE Ultrasonics Symposium, Orlando, Florida (USA), pp. 732-735, 2011.
Zahnd G, Marion A, Sérusclat A, Moulin P, Durand M, Boussel L, Vray D. "A new user-independent in vivo method for 2D motion estimation of the carotid wall by ultrasound imaging for early detection of pathological behavior." IEEE Ultrasonics Symposium, San Diego, California (USA), pp. 1348-1351, 2010.
Zahnd G, Basarab A, Liebgott H, Basset O, Delachartre P. "Real-time specific beamforming applied to motion trajectory estimation in ultrasound imaging." IEEE Ultrasonics Symposium, Roma (Italy), pp. 1342-1345, 2009.
National conferences with proceedings
Zahnd G, Orkisz M, Sérusclat A, Vray D. "Estimation de la trajectoire 2D des parois de l’artère carotide, dans des séquences d’images échographiques, par une approche conjointe de segmentation et de suivi de speckle guidé." GRETSI, Bordeaux (France), 2011, in press.
Zahnd G, Marion A, Sérusclat A, Durand M, Boussel L, Vray D. "Estimation des paramètres mécaniques de la paroi carotidienne par imagerie ultrasonore in vivo pour la détection précoce de comportements pathologiques." 10ème Congrès Français d'Acoustique, Lyon (France), 2010.
Master
Real-time specific beamforming applied to motion trajectory estimation in ultrasound imaging. CREATIS, 2009.
Teaching
Computer science practical course & Mechatronics - 2nd year EURINSA students
Computer science practical course - 1st year ASINSA students (2009-11)
Pretty stuff
