UZH-Logo

Maintenance Infos

Sensory perceptions of individuals exposed to the static field of a 7T MRI: a controlled blinded study


Friebe, Björn; Wollrab, Astrid; Thormann, Markus; Fischbach, Katharina; Ricke, Jens; Grueschow, Marcus; Kropf, Siegfried; Fischbach, Frank; Speck, Oliver (2015). Sensory perceptions of individuals exposed to the static field of a 7T MRI: a controlled blinded study. Journal of Magnetic Resonance Imaging (JMRI), 41(6):1675-1681.

Abstract

PURPOSE: To determine the subjective experience of subjects undergoing 7T magnetic resonance imaging (MRI) compared to a mock scanner with no magnetic field.
METHODS AND MATERIALS: In all, 44 healthy subjects were exposed to both the B0 field of a 7T whole-body MRI and a realistic mock scanner with no magnetic field. Subjects were blinded to the actual field strength and no scanning was performed. After exposure, subjects rated their experience of potential sensory perceptions.
RESULTS: The most frequently observed side effect was vertigo while entering the gantry, which was reported by 38.6% (n = 17). Other frequent side effects were the appearance of phosphenes (18.2%, n = 8), thermal heat sensation (15.9%), unsteady gait after exposure (13.6%, n = 6), and dizziness (13.6%). All side effects were reported significantly more often after 7T exposure. Nine subjects (20.5%) did not report any sensory perceptions at all, ie, neither in the 7T scanner nor in the mock scanner.
CONCLUSION: Light, acute, and transient sensory perceptions can occur in subjects undergoing ultrahighfield MRI, of which vertigo seems to be the most frequently reported. Possible psychological effects might contribute to the emergence of such sensory perceptions, as some subjects also reported them to appear in a realistic mock scanner with no magnetic field.

Abstract

PURPOSE: To determine the subjective experience of subjects undergoing 7T magnetic resonance imaging (MRI) compared to a mock scanner with no magnetic field.
METHODS AND MATERIALS: In all, 44 healthy subjects were exposed to both the B0 field of a 7T whole-body MRI and a realistic mock scanner with no magnetic field. Subjects were blinded to the actual field strength and no scanning was performed. After exposure, subjects rated their experience of potential sensory perceptions.
RESULTS: The most frequently observed side effect was vertigo while entering the gantry, which was reported by 38.6% (n = 17). Other frequent side effects were the appearance of phosphenes (18.2%, n = 8), thermal heat sensation (15.9%), unsteady gait after exposure (13.6%, n = 6), and dizziness (13.6%). All side effects were reported significantly more often after 7T exposure. Nine subjects (20.5%) did not report any sensory perceptions at all, ie, neither in the 7T scanner nor in the mock scanner.
CONCLUSION: Light, acute, and transient sensory perceptions can occur in subjects undergoing ultrahighfield MRI, of which vertigo seems to be the most frequently reported. Possible psychological effects might contribute to the emergence of such sensory perceptions, as some subjects also reported them to appear in a realistic mock scanner with no magnetic field.

Citations

Dimensions.ai Metrics
5 citations in Web of Science®
5 citations in Scopus®
5 citations in Microsoft Academic
Google Scholar™

Altmetrics

Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:03 Faculty of Economics > Department of Economics
Dewey Decimal Classification:330 Economics
Language:English
Date:2015
Deposited On:16 Feb 2015 07:33
Last Modified:14 Feb 2018 08:57
Publisher:Wiley-Blackwell Publishing, Inc.
ISSN:1053-1807
Additional Information:This is the accepted version of the following article: Journal of Magnetic Resonance Imaging: Article first published online : 19 SEP 2014, which has been published in final form at DOI: 10.1002/jmri.24748
OA Status:Closed
Publisher DOI:https://doi.org/10.1002/jmri.24748

Download

Full text not available from this repository.
View at publisher

Get full-text in a library