Which implants pose risks during MRI?

Which implants pose risks during MRI?

• A. MRI is generally safe for all implants
• B. No implants pose any risk
• C. Pacemakers, ferromagnetic metal implants, and cochlear implants pose risks
• D. Only dental fillings pose risk

Answer: (C)

MRI uses a strong magnetic field and radiofrequency energy that can interact with implanted devices. Pacemakers are particularly risky because the magnetic field can interfere with their sensing and pacing, potentially causing inappropriate pacing, pauses, or device misbehavior; leads can also heat up and injure tissue. Ferromagnetic metal implants can experience torque or movement in the magnetic field, which may cause discomfort or injury and can displace surrounding tissues. Cochlear implants have internal magnets and electronics that can be distorted or damaged by the MRI, with risks of heating, device malfunction, or image interference. Dental fillings are typically nonferromagnetic and present minimal risk during MRI.

MRI uses a strong magnetic field and radiofrequency energy that can interact with implanted devices. Pacemakers are particularly risky because the magnetic field can interfere with their sensing and pacing, potentially causing inappropriate pacing, pauses, or device misbehavior; leads can also heat up and injure tissue. Ferromagnetic metal implants can experience torque or movement in the magnetic field, which may cause discomfort or injury and can displace surrounding tissues. Cochlear implants have internal magnets and electronics that can be distorted or damaged by the MRI, with risks of heating, device malfunction, or image interference. Dental fillings are typically nonferromagnetic and present minimal risk during MRI.