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Computational Imaging Lunch: Motion Resolved Dynamic MRI

Title: Motion resolved dynamic MRI
Speakers: Frank Ong

Description:  In some MRI applications, we are interested in visualizing motion over time, such as cardiac or respiratory motion, for functional information. However, there are a few challenges in reconstructing these motion dynamics accurately: 1) Each time frame is vastly under sampled in the Fourier domain, so some priors on motion is needed for reconstruction 2) Accurate representation for complex body motion are difficult come up with. 3) It is not clear how to incorporate motion models in an inverse problem formulation (what is the cost function?).

In this talk, I will give an overview of the problem and present preliminary results in modeling non-rigid body motion as local linear translations, which leads a cleaner formulation.