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Short-term effects experienced during examinations in an actively shielded 7 T MR.

Journal article
Authors Boel Hansson
Peter Höglund
Karin Markenroth Bloch
Markus Nilsson
Johan Olsrud
Jonna Wilén
Isabella Björkman-Burtscher
Published in Bioelectromagnetics
Volume 40
Issue 4
Pages 234-249
ISSN 1521-186X
Publication year 2019
Published at Institute of Clinical Sciences, Department of Radiology
Pages 234-249
Language en
Links dx.doi.org/10.1002/bem.22189
www.ncbi.nlm.nih.gov/entrez/query.f...
Keywords Dizziness, etiology, Humans, Magnetic Fields, Magnetic Resonance Imaging, adverse effects, Movement, Patient Compliance, Radiation Exposure, adverse effects, Surveys and Questionnaires
Subject categories Medical Image Processing, Radiology, Diagnostic radiology, Nursing

Abstract

The objective of this study was to evaluate occurrence and strength of short-term effects experienced by study participants in an actively shielded (AS) 7 tesla (7 T) magnetic resonance (MR) scanner, to compare results with earlier reports on passively shielded (PS) 7 T MR scanners, and to outline possible healthcare strategies to improve patient compliance. Study participants (n = 124) completed a web-based questionnaire directly after being examined in an AS 7 T MR (n = 154 examinations). Most frequently experienced short-term effects were dizziness (84%) and inconsistent movement (70%), especially while moving into or out of the magnet. Peripheral nerve stimulation (PNS)-twitching-was experienced in 67% of research examinations and showed a dependence between strength of twitches and recorded predicted PNS values. Of the participants, 74% experienced noise levels as acceptable and the majority experienced body and room temperature as comfortable. Of the study participants, 95% felt well-informed and felt they had had good contact with the staff before the examination. Willingness to undergo a future 7 T examination was high (>90%). Our study concludes short-term effects are often experienced during examinations in an AS 7 T MR, leaving room for improvement in nursing care strategies to increase patient compliance. Bioelectromagnetics. 2019;9999:XX-XX. © 2019 The Authors. Bioelectromagnetics Published by Wiley Periodicals, Inc.

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