A generic approach for reverse polarization device imaging.

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.