My colleague Brad Treeby from the Biomedical Ultrasound Group (BUG) at UCL got me involved in an interesting project that tries to find ways to numerically simulate the acoustic fields that ultrasound transducers generate in complex media. The idea is to find an equivalent interior source term that would reproduce field measurements taken in a homogeneous medium. The work let to a paper titled “Equivalent-Source Acoustic Holography for Projecting Measured Ultrasound Fields through Complex Media” which just got accepted for publication in IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control. Big thanks to Brad and the other co-authors!
Together with Tanja Tarvainen, I organize a minisymposium on “Imaging with Light and Sound” at the SIAM conference on Imaging Science 2018, which will take place in Bologna. It’s going to be a great and exciting conference, check out the list of all minisymposia.
A while ago, I got involved in an interesting collaboration with Alexandre Gramfort, Joseph Salmon & Yousra Bekhti from the Télécom ParisTech. We drew a connection between majorization-minimization methods for sparse non-convex regression and a particular kind of hierarchical Bayesian modeling. Furthermore, we demonstrate how it can be used to quantify the inherent uncertainty and ambiguity of ill-posed regression problems such as EEG/MEG source reconstruction. The paper can be found on arXiv, big thanks to all the co-authors! [Update: It has been published in Inverse Problems.]
We just submitted our second major paper on how to improve dynamic, high-resolution 3D photoacoustic tomography (4D PAT) by novel imaging techniques. It combines compressed sensing data acquisition with a generic spatio-temporal regularization framework that incorporates a PDE-based motion model. The paper can be found on arXiv, big thanks to all the co-authors! [Update: It has been published in SIAM Imaging Science.]
I just moved to Amsterdam to pick up a tenure track position at the Centrum Wiskunde & Informatica (CWI). With the group for Computational Imaging, headed by Joost Batenburg, I will work on dynamic computerized tomography (CT). Their facilities include a world class X-ray lab that allows you to design a wide range of interesting challenging experiments. Check out the news story about the opening of the lab including a pretty cool animation