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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