✦ LIBER ✦

Exposure to high-field MRI does not affect cognitive function

✍ Scribed by Marc Schlamann; Melanie A. Voigt; Stefan Maderwald; Andreas K. Bitz; Oliver Kraff; Susanne C. Ladd; Mark E. Ladd; Michael Forsting; Hans Wilhelm

Publisher: John Wiley and Sons
Year: 2010
Tongue: English
Weight: 83 KB
Volume: 31
Category: Article
ISSN: 1053-1807
DOI: 10.1002/jmri.22065

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Purpose

To assess potential cognitive deficits under the influence of static magnetic fields at various field strengths some studies already exist. These studies were not focused on attention as the most vulnerable cognitive function. Additionally, mostly no magnetic resonance imaging (MRI) sequences were performed.

Materials and Methods

In all, 25 right‐handed men were enrolled in this study. All subjects underwent one MRI examination of 63 minutes at 1.5 T and one at 7 T within an interval of 10 to 30 days. The order of the examinations was randomized. Subjects were referred to six standardized neuropsychological tests strictly focused on attention immediately before and after each MRI examination. Differences in neuropsychological variables between the timepoints before and after each MRI examination were assessed and P‐values were calculated

Results

Only six subtests revealed significant differences between pre‐ and post‐MRI. In these tests the subjects achieved better results in post‐MRI testing than in pre‐MRI testing (P = 0.013–0.032). The other tests revealed no significant results.

Conclusion

The improvement in post‐MRI testing is only explicable as a result of learning effects. MRI examinations, even in ultrahigh‐field scanners, do not seem to have any persisting influence on the attention networks of human cognition immediately after exposure. J. Magn. Reson. Imaging 2010;31:1061–1066. © 2010 Wiley‐Liss, Inc.

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