Abstract #3308

Super-resolution T2* mapping of the knee using UTE Spiral VIBE MRI

Céline Smekens¹, Quinten Beirinckx², Floris Vanhevel³, Pieter Van Dyck³, Arjan den Dekker², Jan Sijbers², Thomas Janssens¹, and Ben Jeurissen²

¹Siemens Healthcare NV/SA, Beersel, Belgium, ²imec-Vision Lab, Department of Physics, University of Antwerp, Wilrijk, Belgium, ³Department of Radiology, Antwerp University Hospital and University of Antwerp, Edegem, Belgium

T2* mapping using ultrashort echo time (UTE) MRI allows for quantitative evaluation of collagen-rich knee structures with short mean transverse relaxation times. However, acquisitions with low through-plane resolution are commonly used to obtain T2* maps within reasonable scan times, affecting the accuracy of the estimations because of partial volume effects. In this work, model-based super-resolution reconstructions based on UTE Spiral VIBE MRI were performed to obtain high-resolution T2* maps of knee structures within a reasonable scan time. The obtained T2* maps are comparable to maps generated with direct 3D UTE Spiral VIBE acquisitions while requiring approximately 25% less scan time.

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