In the context of radiofrequency ablation of cardiac arrhythmia, a catheter is inserted into the heart for contact electrophysiology recording and/or ablating the arrhythmogenic substrate. In this context, we propose to exploit MR-compatible microcoils located near the catheter tip to estimate the local motion of the heart. For this, a tracking module was interleaved with segments of a radial acquisition in a FLASH sequence. k-space segments were sorted retrospectively according to tracking readings before image reconstruction. Using this approach, artifact free images of a pig in vivo could be reconstructed.
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