MRI Guidelines - Implanted Above Rib 4
Scan Conditions
SenTiva™ Model 1000, SenTiva DUO™ Model 1000-D, AspireSR™ Model 106, AspireHC™ Model 105, Demipulse™ Model 103
The following scan conditions apply for a cylindrical closed-bore 1.5T or 3.0T scanner.
The device has been evaluated for MRI induced risks, including heating, unintended stimulation, force, torque, device malfunction and device vibration and has been determined to be safe under the conditions specified in labeling; however, the patient may feel sensations of warmth or vibration at the implant site during the MRI scan.
Scan conditions - Latest VNS Therapy technology
*Demipulse™ Model 103, AspireHC™ Model 105, AspireSR™ Model 106, SenTiva™ Model 1000
MR Conditional | Yes |
|---|---|
| Static Magnet Strength | 1.5T or 3T |
| Scanner Type | Horizontal field, cylindrical closed-bore |
| Operating Model | Normal Operating Mode |
| Exclusion Zone | Body Coil: C7-L3 Transmit-receive head or extremity coil: C7-T8 |
| Max Spatial Gradient | ≤3000 Gauss/cm |
| Max Skew Rate | 200 T/m/s |
| RF Coil | Transmit: Body coil or Transmit-receive head or extremity coils Receive: No restrictions |
| Max SAR | Transmit head coil: 3.2 W/kg Transmit body coil: 2.0 W/kg |
| System Programming | Stimulation OFF Sensing OFF* *for select models with AutoStim mode Optional device feature OFF (Models 1000 only) |
| Exposure Time | Transmit head of extremity coil: No restrictions Transmit body coil: ≤15 minutes of active scan time within a 30 minute window |
| Additional Restrictions | Transmit head or extremity coil: none Transmit body coil: Circularlized Polarized mode only |
