Magnetic resonance imaging of the ankle performed on an InterStim patient.

Patients undergoing InterStim implantation often have comorbidities, which require magnetic resonance imaging (MRI) for diagnosis. Although MRI of the head has been recently approved for use with the InterStim neurostimulator, imaging of other regions remains controversial. We present a case of Achilles tendinitis diagnosed on MRI of the ankle in a patient with an InterStim device. The neurostimulator was deactivated, and using a transmit/receive extremity coil, the left ankle was imaged without any adverse events. At 9 months post-imaging, the patient continued to have good control of symptoms with InterStim, with no negative effects from MRI. MRI of the ankle is feasible in patients with InterStim implants using transmit/receive coils. Further evaluation is warranted to study the safety of MRI of other body region in InterStim patients.