Inductively-overcoupled coil design for high resolution magnetic resonance imaging

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dc.contributor.author Mehmet Bilgen en_US
dc.date.accessioned 2009-05-05T16:14:17Z
dc.date.available 2006 - en_US
dc.date.available 2009-05-05T16:14:17Z
dc.date.issued 2007-11-01 en_US
dc.identifier.citation Mehmet Bilgen: Inductively-overcoupled coil design for high resolution magnetic resonance imaging. Biomed Eng Online 2006, 5(1):3. en_US
dc.identifier.uri http://www.biomedical-engineering-online.com/content/5/1/3 en_US
dc.identifier.uri http://hdl.handle.net/2271/596
dc.description.abstract BACKGROUND:Maintaining the quality of magnetic resonance images acquired with the current implantable coil technology is challenging in longitudinal studies. To overcome this challenge, the principle of 'inductive overcoupling' is introduced as a method to tune and match a dual coil system. This system consists of an imaging coil built with fixed electrical elements and a matching coil equipped with tuning and matching capabilities. Overcoupling here refers to the condition beyond which the peak of the current in the imaging coil splits.METHODS:The combined coils are coupled inductively to operate like a transformer. Each coil circuit is electrically represented by equivalent lumped-elements. A theoretical analysis is given to identify the frequency response characteristics of the currents in each coil. The predictions from this analysis are translated into experiments and applied to locally image rat spinal cord at 9.4 T using an implantable coil as the imaging coil and an external volume coil as the matching coil.RESULTS:The theoretical analysis indicated that strong coupling between the coils divides the resonance peaks on the response curves of the currents. Once these newly generated peaks were tuned and matched to the desired frequency and impedance of operation, in vivo images were acquired from the rat spinal cord at high quality and high resolution.CONCLUSION:After proper implementation, inductive overcoupling provides a unique opportunity for tuning and matching the coil system, and allows reliable and repeatable acquisitions of magnetic resonance data. This feature is likely to be useful in experimental studies, such as those aimed at longitudinally imaging the rat following spinal cord injury. en_US
dc.format.extent 1006703 bytes
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dc.format.mimetype application/pdf
dc.format.mimetype text/plain
dc.format.mimetype application/octet-stream
dc.format.mimetype application/octet-stream
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dc.language en en_US
dc.language.iso en_US
dc.publisher BioMedCentral en_US
dc.relation.ispartof 1475-925X en_US
dc.relation.hasversion http://www.biomedcentral.com/content/pdf/1475-925X-5-3.pdf en_US
dc.rights This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. en_US
dc.rights.uri http://creativecommons.org/licenses/by/2.0 en_US
dc.subject.mesh Adult en_US
dc.subject.mesh Aged en_US
dc.subject.mesh Body Weight/ physiology en_US
dc.subject.mesh Diet, Carbohydrate-Restricted en_US
dc.subject.mesh Diet, Fat-Restricted en_US
dc.subject.mesh Diet, Reducing en_US
dc.subject.mesh Dietary Carbohydrates/administration & dosage en_US
dc.subject.mesh Dietary Fats/administration & dosage en_US
dc.subject.mesh Female en_US
dc.subject.mesh Humans en_US
dc.subject.mesh Male en_US
dc.subject.mesh Middle Aged en_US
dc.subject.mesh Obesity/ diet therapy en_US
dc.subject.mesh Overweight/diet therapy en_US
dc.subject.mesh Treatment Outcome en_US
dc.subject.mesh Weight Loss en_US
dc.title Inductively-overcoupled coil design for high resolution magnetic resonance imaging en_US
dc.type article en_US
dc.date.captured 2009-04-27 en_US
dc.identifier.doi doi:10.1186/1475-925X-5-3 en_US
dc.identifier.pmid 17976244 en_US

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This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Except where otherwise noted, this item's license is described as This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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