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Figure 5 Accuracy of image integration based upon the iron oxide injection experiments. (A) As described in the legend of Figure 2, the register magnetic resonance imaging was used to guide movement of the catheter tip (green icon) to the iron oxide injection targets (yellow dot). (B and C) After catheter ablation at this point, the animal was killed and distance from the ablation lesion (blue asterisk) to the injection (arrow) noted.