MRI safety: which statement reflects accurate safety considerations?

MRI safety: which statement reflects accurate safety considerations?

• A. Metal objects must be removed; some implanted devices may preclude MRI.
• B. MRI can be performed with any implanted device.
• C. Nonmetallic implants never interfere with MRI.
• D. There is no noise during MRI.

Answer: (C)

MRI safety hinges on how the strong magnetic field interacts with objects inside and on the patient. Ferromagnetic metal can be pulled by the magnet or heated by the RF energy, so metal objects must be removed or secured before scanning to prevent movement or burns. Likewise, implanted devices—such as certain pacemakers, defibrillators, or other implants—may be unsafe or require special conditions, because the magnetic field or RF energy can affect their function or patient safety. Nonmetallic implants do not automatically guarantee safety; they can still cause image artifacts or have other risks depending on their material and location. And MRI scanners are loud, so there is always noticeable noise during the procedure. Therefore, the statement that metal objects must be removed and that some implanted devices may preclude MRI reflects accurate safety considerations.

MRI safety hinges on how the strong magnetic field interacts with objects inside and on the patient. Ferromagnetic metal can be pulled by the magnet or heated by the RF energy, so metal objects must be removed or secured before scanning to prevent movement or burns. Likewise, implanted devices—such as certain pacemakers, defibrillators, or other implants—may be unsafe or require special conditions, because the magnetic field or RF energy can affect their function or patient safety. Nonmetallic implants do not automatically guarantee safety; they can still cause image artifacts or have other risks depending on their material and location. And MRI scanners are loud, so there is always noticeable noise during the procedure. Therefore, the statement that metal objects must be removed and that some implanted devices may preclude MRI reflects accurate safety considerations.