Safety Considerations of 7-T MRI in Clinical Practice

Area of Science:

• Medical Imaging
• Biophysics
• Clinical Safety

Background:

• Seven-Tesla (7T) Magnetic Resonance Imaging (MRI) is now approved for clinical use.
• Higher magnetic fields introduce specific safety considerations not present at lower field strengths.

Purpose of the Study:

• To review the distinct safety issues associated with 7T MRI.
• To discuss the underlying reasons for these safety concerns.
• To explore potential strategies for mitigating risks.

Main Methods:

• Literature review of safety considerations in 7T MRI.
• Analysis of physical interactions (e.g., metallic implants, radiofrequency power deposition).
• Review of reported patient bioeffects at 7T.

Main Results:

• Safety concerns include forces on metallic implants and radiofrequency-induced heating.
• Patient bioeffects like vertigo, dizziness, and magnetophosphenes are more frequent at 7T.
• These effects can be more pronounced compared to lower field MRI.

Conclusions:

• 7T MRI requires careful consideration of safety protocols.
• Understanding and addressing implant interactions and bioeffects are crucial.
• Implementing risk mitigation strategies is essential for patient and healthcare professional safety.