Automatic tuning and matching of a small multifrequency saddle coil at 4.7 T

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Show simple item record Pérez de Alejo, Rigoberto Garrido, Carlos Villa, Palmira Rodriguez, Ignacio Vaquero López, Juan José Ruiz Cabello, Jesús Cortijo, Manuel 2010-10-06T09:20:08Z 2010-10-06T09:20:08Z 2004-03-26
dc.identifier.bibliographicCitation Magnetic Resonance in Medicine, 2004, vol. 51, n. 4, p. 869–873
dc.description.abstract A new circuit design for automatically tuning and matching a saddle coil for small animal imaging is presented. This design allows working at 1H, 19F, and 3He resonance frequencies in a 4.7 T spectrometer. It is based on a balanced circuit with commercial variable capacity diodes controlled by a computer using digital potentiometers. The change between two different frequencies can be accurately performed in a few seconds. System Q is compared, between 140–210 MHz, to the same coil tuned and matched with high Q variable capacitors. Differences lower than 5% were found with a loaded coil. The proposed design has initially been evaluated in 19F and 1H NMR images acquired with a five-tube phantom. An application is also shown for the acquisition of 3He, 19F, and 1H lung images in a control rat
dc.format.mimetype application/pdf
dc.language.iso eng
dc.publisher Wiley
dc.rights ©Wiley
dc.subject.other Magnetic resonance imaging
dc.subject.other Automatic frequency control
dc.subject.other Saddle coil
dc.subject.other Multifrequency NMR
dc.title Automatic tuning and matching of a small multifrequency saddle coil at 4.7 T
dc.type article PeerReviewed
dc.description.status Publicado
dc.subject.eciencia Biología y Biomedicina
dc.identifier.doi 10.1002/mrm.20045
dc.rights.accessRights openAccess
dc.identifier.publicationfirstpage 869
dc.identifier.publicationissue 4
dc.identifier.publicationlastpage 873
dc.identifier.publicationtitle Magnetic Resonance in Medicine
dc.identifier.publicationvolume 51
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