Journal article
Peripheral nerve stimulation in a whole‐body echo‐planar imaging system
Journal of magnetic resonance imaging, Vol.7(2), pp.405-409
03/1997
DOI: 10.1002/jmri.1880070226
PMID: 9090599
Abstract
Echo‐planar techniques in MRI use a rapidly oscillating frequency‐encoding gradient with the potential to produce peripheral nerve stimulation. To evaluate the incidence, type, and location of stimulation in a commercial whole‐body scanner, we studied two groups: (a) 173 consecutive individuals scanned by echo‐planar imaging for other purposes and (b) seven subjects who were scanned with an extensive set of 36 echo‐planar sequences (with prompting after each scan to report any peripheral nerve stimulation) to test the effects of various parameters. Although only 5% of group A reported symptoms of peripheral nerve stimulation, all in group B experienced some type of stimulation, dependent primarily on direction of the oscillating gradient and location of the body within the gradient coil. Maximum stimulation typically occurred 30 to 40 cm from isocenter in the region of maximum dB/dt. Generally, y gradients produced truncal stimulation, and x gradients produced stimulation in the head. When hands were clasped over the abdomen, a tingling in the hands occasionally was felt. Patients should be instructed to keep their hands apart.
Details
- Title: Subtitle
- Peripheral nerve stimulation in a whole‐body echo‐planar imaging system
- Creators
- James C EhrhardtChin‐S LinVincent A MagnottaDavid J FisherWilliam T. C Yuh
- Resource Type
- Journal article
- Publication Details
- Journal of magnetic resonance imaging, Vol.7(2), pp.405-409
- Publisher
- Wiley Subscription Services, Inc., A Wiley Company; Baltimore
- DOI
- 10.1002/jmri.1880070226
- PMID
- 9090599
- ISSN
- 1053-1807
- eISSN
- 1522-2586
- Number of pages
- 5
- Language
- English
- Date published
- 03/1997
- Academic Unit
- Roy J. Carver Department of Biomedical Engineering; Radiology; Psychiatry; Iowa Neuroscience Institute
- Record Identifier
- 9984051558902771
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