User's Manual

MRI Information
Non-clinical testing has demonstrated that the StimRouter lead is MR Conditional. Patients with
an implanted StimRouter lead can be scanned safely, immediately after implantation, on MRI
cylindrical bore systems that meet the following conditions:
•
•
•
Static magnetic field of 1.5 Tesla (T) or 3 T.
Highest spatial magnetic gradient of 2500 gauss/cm or less.
MR system reported, whole-body-averaged SAR does not exceed 2 W/kg at 1.5 T and
2 W/kg at 3 T.
Do not scan patients with a SAR level exceeding 2 W/kg. A scan above 2 W/kg may
increase the risk of MR-related heating.
The entire StimRouter lead must be at least 50 cm from the center of the MR
system’s bore (the iso-center of the bore) and at least 16 cm outside of the MR coil
measured from the edge of the MR coil, to ensure patient safety relative to MRI-related
heating. See Figure 2-1.
•
•
Bore
Table
RF Coil
Isocenter
>50 cm
cm
>16
>16 cm
Lead
Lead
Figure 2-1. The entire StimRouter lead must be at least 50 cm from the center of the MR system’s bore
(the iso-center) and at least 16 cm outside of the MR coil measured from the edge of the MR coil.
Left: lead implanted in the forearm. Right: Lead implanted in the lower leg.
6
Clinician’s Guide
cm
>50