The impact of MRI procedures on medical devices has been the subject of regulatory concern for better than a decade, but the FDA needed until 2019 to craft a guidance that deals with testing and labeling for such considerations. The final guidance offers several tweaks and adjustments to the 2019 draft, but ignores several requests made by industry, including a request that the final not rely on a clinically relevant worst-case scenario when evaluating the potential for device heating.