prof. Hervé Liebgott

Université Claude Bernard Lyon 1,
Lyon, France

Motion estimation in ultrafast ultrasound imaging and medical applications

Medical imaging has long been considered only a tool for anotomic inspection of the observed tissues. But, more and more medical imaging is providing functional information and allows to charecatrize better tissues, enabling a better diagnosis. In particular the study of the motion, i.e. not only the displacement but also deformation, speed, propagation of mechanical waves inside the tissues plays a key role in this functional charcaterization. In this contect medical ultrasound has a central position due to its ability to provide fast acquisition rates reaching nowadays several thousands of frames per second depending on the observed organs. In this presentation it will be shown how the emergence of high frame rate or so called ultra-fast ultrasound imaging is revolutionizing the domain of medical imaging. The principle of these new imaging sequences along with some motion estimation methods will be recalled. Applications, mainly linked to the study of the motion of tissues and blood flow velocities in the cardiovascular system, which are the topics our team is working on at CREATIS, will be presented. Some perspectives of these techniques and their extension to 3D will also be given. BIO: Hervé Liebgott is a professor at CREATIS where he is the head of the ultrasound group. He is a junior member of the prestigious Institut Universitaire de France. His research concerns signal and image processing methods for medical ultrasound imaging. More specifically his work focuses on image reconstruction / beamforming and motion estimation. The application he’s working with are mainy cardiac and vascular. He is currently an associate editor of the IEEE Transcations on UFFC and a member of the technical program committee of the IEEE international Ultrasonics Symposium.