Managing Patients With Unlabeled Passive Implants on MR Systems Operating Below 1.5 T

Area of Science:

• Medical Imaging
• Biomedical Engineering
• Radiology

Background:

• Standard MRI safety protocols focus on 1.5 T and 3 T scanners, leaving a gap for lower field strength systems.
• Patients with implants often have "MR Conditional" labeling valid only at higher field strengths.
• Lower field strength MRI scanners (below 1.5 T) present unique challenges for evaluating implant safety.

Purpose of the Study:

• To provide guidance for managing patients with passive implants on MRI scanners operating below 1.5 T.
• To empower physicians with knowledge for risk-benefit assessments in off-label MRI scenarios.
• To ensure safe and confident MRI examinations for patients with passive implants.

Main Methods:

• Review of clinical MR systems operating below 1.5 T.
• Analysis of MRI safety factors influencing passive implants (static magnetic field interactions, RF heating).
• Development of management suggestions for MR Conditional implants on lower field strength scanners.

Main Results:

• Identified knowledge gaps among physicians regarding MRI safety for passive implants on scanners below 1.5 T.
• Highlighted risks of unsafe imaging conditions or denied MRI access for patients with implants.
• Provided a framework for understanding MRI-related safety issues for passive implants.

Conclusions:

• Physicians need comprehensive understanding of MRI safety for passive implants on scanners below 1.5 T.
• Effective risk-benefit assessment is crucial for patients with implants undergoing lower field strength MRI.
• This monograph aims to improve physician confidence and safety in performing MRI exams for patients with passive implants.