| A new silent magnetic resonance imaging using a rotating DC gradient. | |
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MedLine Citation:
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PMID: 9469717 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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A new approach to silent MR imaging using a rotating DC gradient has been explored and experimentally studied. Acoustic or sound noise has been one of the problems in examining patients, mainly due to the fast gradient pulsings in interaction with the main magnetic field. The sound noise has been noted to be proportionately louder as the magnetic field strength becomes larger. In this report, we describe a new imaging technique using a mechanically rotating DC gradient coil. The rotating DC gradient coil can effectively replace both phase encoding as well as readout gradient pulsings, and data obtained in this manner can provide a set of projection data that later can be used for projection reconstruction. With some interpolation techniques one can also perform conventional two-dimensional fast Fourier transform image reconstruction. The sound noise intensity compared with the conventional imaging technique, such as the spin-echo sequence, has been reduced down to about -20.7 dB or 117.5 times with this new technique. The experimental pulse sequence and its principle are described and images obtained by the new silent MR imaging technique are reported. |
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Authors:
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Z H Cho; S T Chung; J Y Chung; S H Park; J S Kim; C H Moon; I K Hong |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Magnetic resonance in medicine : official journal of the Society of Magnetic Resonance in Medicine / Society of Magnetic Resonance in Medicine Volume: 39 ISSN: 0740-3194 ISO Abbreviation: Magn Reson Med Publication Date: 1998 Feb |
Date Detail:
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Created Date: 1998-03-24 Completed Date: 1998-03-24 Revised Date: 2004-11-17 |
Medline Journal Info:
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Nlm Unique ID: 8505245 Medline TA: Magn Reson Med Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 317-21 Citation Subset: IM |
Affiliation:
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Department of Radiological Sciences, University of California, Irvine 92717, USA. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Equipment Design Humans Image Processing, Computer-Assisted Magnetic Resonance Imaging / instrumentation*, methods Noise / prevention & control* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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