[Physical interactions in MRI: Some rules of thumb for their reduction]

Area of Science:

• Medical Imaging Physics
• Biomedical Engineering
• Radiological Safety

Context:

• Magnetic Resonance Imaging (MRI) is a powerful diagnostic tool with inherent physical complexities.
• Ensuring a safe workflow in MRI environments requires operators to possess a thorough understanding of potential physical interactions.
• The projectile effect, stemming from inattentiveness, poses a significant risk in MRI settings.

Purpose:

• To elucidate the physical principles underlying MRI safety.
• To detail the interactions of static magnetic fields, gradient fields, and high-frequency (HF) fields within the MRI environment.
• To provide practical guidelines for minimizing risks associated with these physical fields.

Summary:

• This article examines the three primary sources of physical interaction in MRI: static magnetic fields, gradient fields, and high-frequency (HF) fields.
• It differentiates the impacts of each field type on human physiology, interactions with metallic objects and implants, and adherence to safety standards.
• Each section concludes with actionable rules of thumb for mitigating unwanted physical MRI interactions.

Impact:

• Enhances operator knowledge for safer MRI procedures.
• Reduces the risk of accidents and incidents in MRI suites.
• Promotes a comprehensive understanding of MRI physics for improved patient and staff safety.