ISMRM & ISMRT Annual Meeting & Exhibition • 03-08 June 2023 • Toronto, ON, Canada

ISMRM & ISMRT Annual Meeting & Exhibition

Weekday Course

Physics of MRI Safety for Clinicians

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Physics of MRI Safety for Clinicians
Weekday Course
ORGANIZERS: Maxime Guye, Rolf Schulte
Wednesday, 07 June 2023
701A
08:15 -  10:15
Moderators: Maureen Hood & Kagayaki Kuroda
Skill Level: Basic
Session Number: W-02
CME Credit
Session Number: W-02

Overview
This two-hour course will be a basic but comprehensive review of the MR system components and the safety issues associated with their operation. The presentations will be non-mathematical and suitable for clinicians and physicists new to the field and will cover topics including the magnet, gradient coils, and RF coils, as well as the specific risks of implants and devices.

Target Audience
This course is primarily designed for the clinicians who will benefit from an understanding of the components of MR systems and the risks associated with each of them. Those interested may include: radiologists and clinicians relatively new to MR imaging (including residents and fellows), experienced radiologists and clinicians wanting a refresher course in MR safety, and physicists and engineers wanting an introduction to the field.

Educational Objectives
As a result of attending this course, participants should be able to:
- Describe the basic components of MRI systems including high-field and high-gradient strength systems;
- Discuss the potential effects and risks related to each component; and
- Explain how to evaluate, manage, and monitor these risks.
08:15   Static Magnetic Fields & Associated Risks Isabella Björkman-Burtscher

Keywords: Transferable skills: Safety

Static magnetic fields & associated risks will review basic MR system components related to the static magnetic field (B0) in the scanner and the fringe field – including the main coil and shield coils. The discussion on risks associated to the static magnetic fields will focus on magneto-mechanical forces and torque, the impact of motion within B0, as well as sensory effects. While attractive forces and torque are main actors in MR safety as proven fatal if underestimated, other effects represent more of a nuisance and challenge patient compliance and comfort than representing a medical risk.
08:45   Radiofrequency Fields & Associated Risks Aurelien Destruel

Keywords: Physics & Engineering: RF Safety, Physics & Engineering: Hardware, Physics & Engineering: High-Field MRI

Radiofrequency (RF) coils are essential components of MR scanners. They can transmit the excitation field B1, receive the MR signal. They can be birdcages, loops or dipoles (and more), volume or surface, for brain, spine, knee or other,… If left unchecked, RF coils may cause tissue heating, requiring the control of the specific absorption rate (SAR). What exactly is this parameter, and how is it calculated? This talk will give an overview of RF coils and RF safety used in clinical environments, while introducing problematics specific to ultra-high field MRI, such as parallel transmit techniques (pTx).
09:15   Physiological Effects of Time-Varying Magnetic Fields Susie Huang
09:45   Safety Issues Related to Implants & Devices Heidi Edmonson
 

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The International Society for Magnetic Resonance in Medicine is accredited by the Accreditation Council for Continuing Medical Education to provide continuing medical education for physicians.