Metamaterial MRI-based surgical wound monitor

An implantable sensor for monitoring wound healing after bowel reconstruction is demonstrated. The sensor consists of a pair of magneto-inductive ring resonators, designed for mounting on a biofragmentable anastomosis ring and inductively coupled to an external coil to give a local increase in signal-to-noise ratio near an annular wound during
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H magnetic resonance imaging. SNR enhancement is confirmed using thin-film prototypes operating at 3T.