Abstract #3342

Feasibility and Optimization of Ultra-Short Echo Time MRI for Improved Imaging of IVC Filters

Gesine Knobloch¹, Scott Nagle^1,2,3, Timothy Colgan¹, Tilman Schubert¹, Kevin M. Johnson^1,2, Peter Bannas¹, Nathan Artz¹, Christopher François¹, Mark Schiebler¹, James Holmes¹, and Scott Reeder^1,2,4,5,6

¹Department of Radiology, University of Wisconsin – School of Medicine and Public Health, Madison, WI, United States, ²Department of Medical Physics, University of Wisconsin – School of Medicine and Public Health, Madison, WI, United States, ³Department of Pediatrics, University of Wisconsin – School of Medicine and Public Health, Madison, WI, United States, ⁴Department of Biomedical Engineering, University of Wisconsin – School of Medicine and Public Health, Madison, WI, United States, ⁵Department of Medicine, University of Wisconsin – School of Medicine and Public Health, Madison, WI, United States, ⁶Department of Emergency Medicine, University of Wisconsin – School of Medicine and Public Health, Madison, WI, United States

Monitoring of inferior vena cava (IVC) filters for complications is commonly performed using CTA. It would be desirable to evaluate IVC-filters using MRA to avoid the need for ionizing radiation and to exploit the superior soft tissue contrast of MRA. Unfortunately, conventional contrast enhanced MRA (cMRA) techniques are limited by distortion and signal voids arising from metal in the IVC-filter. In this pilot study, we evaluated the feasibility of ultra-short echo time (UTE) MRA at 3.0T in nine patients with IVC-filters. Results demonstrate feasibility of free-breathing UTE-MRA for the assessment of IVC-filters with comparable IVC-depiction compared to cMRA.

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