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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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