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Abstract #4035

Improved MR thermometry during Microwave ablation by correcting for sporadic electromagnetic interference

Aiming Lu1, Krzysztof R Gorny1, Christopher P Favazza1, Joel P Felmlee1, and David A Woodrum1

1Radiology, Mayo Clinic, Rochester, MN, United States

Image-guided microwave ablation (MWA) is a minimally invasive treatment for localized diseases. MRI is advantageous for localizing the lesions, guiding microwave antennae placement, and assessing the extent of ablation. Monitoring of MWA in real-time using MR thermometry has also been demonstrated to be feasible, but can suffer from the image quality degradation due to electromagnetic interference (EMI) from the microwave generator (MWG). A novel approach to correct for EMI-contaminated images is presented here by utilizing the uncontaminated k-space data from neighboring frames. Significantly improved temperature and thermal dose maps have been obtained in our clinical patient studies.

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