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Abstract #2042

A generic approach for reverse polarization device imaging.

Dursun Korel Yildirim1, Rajiv Ramasawmy1, Daniel A. Herzka2, Robert J. Lederman1, Adrienne Campbell-Washburn3, and Ergin Atalar4,5,6
1National Heart Lung and Blood Institute, National Heart, Lung and Blood Institute, National Institute of Health, Bethesda, MD, United States, 2Department of Radiology, Case Western Reserve University and University Hospitals, Cleveland, OH, United States, 3National Heart, Lung and Blood Institute, National Heart Lung and Blood Institute, National Institute of Health, Bethesda, MD, United States, 4National Heart Lung and Blood Institute, National Institute of Health, Bethesda, MD, United States, 5National Magnetic Resonance Research Center (UMRAM), Bilkent University, Ankara, Turkey, 6Department of Electrical and Electronics Engineering, Bilkent University, Ankara, Turkey

Synopsis

Keywords: Interventional Devices, Interventional Devices, Reverse polarization, resonant marker, inductively coupled marker interventional MRI, interventional cardiovascular MRI

Motivation: MRI-guided intervention relies on tracking passive or active devices such as catheters or needles. Imaging the reverse polarization of inductively-coupled semi-active devices can improve device visualization in real-time.

Goal(s): To propose a generalized method to improve device specificity, which estimates the reverse polarization as orthogonal signals from the forward polarization using singular value decomposition.

Approach: The generalized method was tested against the previously established conjugate method to image a catheter with a resonant marker in a phantom and in a pig.

Results: The generalized reverse polarization method demonstrated improved selective signal from the catheter resonant marker in-vivo and improved the signal strength in-vitro.

Impact: Generalized reverse polarization approach enhances interventional device visibility across various field strengths and MRI systems, promoting broader adoption of interventional MRI with minimal device modifications omitting RF-induced heating prone, long transmission lines, ultimately facilitating safer and more efficient MRI-guided procedures.

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Keywords