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Updated: Jun 20, 2026

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Published on: December 18, 2016
Modification of pulse sequences reduces occupational exposure from MRI switched gradient fields: Preliminary results
Jonna Wilén1, Jón Hauksson, Kjell Hansson Mild
1Department of Radiation Sciences, Umeå University, Umeå, Sweden. jonna.wilen@radfys.umu.se
Abstract:
The gradient fields in magnetic resonance imaging (MRI) will in some circumstances exceed the ICNIRP guidelines of occupational electromagnetic field exposure when personnel are near the scanner during MRI scanning. In this work we have shown that using commercially available modified sequences for noise reduction purposes, exposure will decrease by a factor of 1.5 with preserved image quality. This is a first step toward optimizing occupational exposure within the scanner room without affecting image quality.
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Description of the Procedures
Computed Tomography (CT) scan:
Computed Tomography (CT) scans use X-ray technology to generate detailed images of bones, organs, and tissues. During the scan, the patient lies on a moving table...