This device has a minimal amount of nonferromagnetic metallic material. Through non-clinical testing, the catheter has been shown to be MR safe for patients undergoing examinations using MR systems operating at static magnetic field strengths of 3-Tesla or less. There are no magnetic field interactions ( i.e. magnetically induced displacement force and magnetically induced torque), no MRI-related heating. The artifacts are highly unlikely to present problems if the MR imaging area of interest is in or near the area where this device is located. Testing has not been performed at field strengths higher than 3-Tesla.