Format

Send to

Choose Destination
J Magn Reson Imaging. 2018 Jan;47(1):28-43. doi: 10.1002/jmri.25761. Epub 2017 May 19.

The physics of MRI safety.

Author information

1
Department of Radiology, Brigham and Women's Hospital, Boston, Massachusetts, USA.
2
Harvard Medical School, Boston, Massachusetts, USA.

Abstract

The main risks associated with magnetic resonance imaging (MRI) have been extensively reported and studied; for example, everyday objects may turn into projectiles, energy deposition can cause burns, varying fields can induce nerve stimulation, and loud noises can lead to auditory loss. The present review article is geared toward providing intuition about the physical mechanisms that give rise to these risks. On the one hand, excellent literature already exists on the practical aspect of risk management, with clinical workflow and recommendations. On the other hand, excellent technical articles also exist that explain these risks from basic principles of electromagnetism. We felt that an underserved niche might be found between the two, ie, somewhere between basic science and practical advice, to help develop intuition about electromagnetism that might prove of practical value when working around MR scanners. Following a wide-ranging introduction, risks originating from the main magnetic field, the excitation RF electromagnetic field, and switching of the imaging gradients will be presented in turn.

LEVEL OF EVIDENCE:

5 Technical Efficacy: 1 J. Magn. Reson. Imaging 2018;47:28-43.

KEYWORDS:

MRI physics; RF heating; gradients; magnetic field; safety

PMID:
28543948
DOI:
10.1002/jmri.25761
[Indexed for MEDLINE]

Supplemental Content

Full text links

Icon for Wiley
Loading ...
Support Center