Surgical wound monitoring by MRI with a metamaterial-based implanted local coil
Imperial College London, EEE Department,
2 Imperial College Healthcare NHS Trust, Dept. of Radiology, Praed St., Paddington, W2 1NY London, UK
* e-mail: firstname.lastname@example.org
Accepted: 18 December 2017
Published online: 16 March 2018
An implantable sensor for monitoring surgical wounds after bowel reconstruction is proposed. The sensor consists of a coupled pair of 8-element magneto-inductive ring resonators, designed for mounting on a biofragmentable anastomosis ring to give a local increase in signal-to-noise ratio near an annular wound during 1H magnetic resonance imaging. Operation on an anti-symmetric spatial mode is used to avoid coupling to the B1 field during excitation, and a single wired connection is used for MRI signal output. The electrical response and field-of-view are estimated theoretically. Prototypes are constructed from flexible elements designed for operation at 1.5 T, electrical responses are characterized and local SNR enhancement is confirmed using agar gel phantoms.
Key words: Metamaterial / MRI / local coil
© H. Kamel et al., published by EDP Sciences, 2018
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