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Titolo:
PREDICTING RF FIELD PENETRATION IN HETEROGENEOUS BODIES USING A 3-D FINITE-ELEMENT APPROACH - PRELIMINARY-RESULTS
Autore:
PETROPOULOS LS; HAACKE EM; BROWN RW; BOERNER E;
Indirizzi:
UNIV HOSP CLEVELAND,DEPT RADIOL,2074 ABINGTON RD CLEVELAND OH 44106 UNIV HOSP CLEVELAND,DEPT RADIOL,2074 ABINGTON RD CLEVELAND OH 44106 CASE WESTERN RESERVE UNIV,DEPT PHYS CLEVELAND OH 44106
Titolo Testata:
Magnetic resonance in medicine
fascicolo: 3, volume: 30, anno: 1993,
pagine: 366 - 372
SICI:
0740-3194(1993)30:3<366:PRFPIH>2.0.ZU;2-J
Fonte:
ISI
Lingua:
ENG
Soggetto:
POWER DEPOSITION; NMR;
Keywords:
FINITE ELEMENT; RF PENETRATION; DIELECTRIC PROPERTIES;
Tipo documento:
Note
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
20
Recensione:
Indirizzi per estratti:
Citazione:
L.S. Petropoulos et al., "PREDICTING RF FIELD PENETRATION IN HETEROGENEOUS BODIES USING A 3-D FINITE-ELEMENT APPROACH - PRELIMINARY-RESULTS", Magnetic resonance in medicine, 30(3), 1993, pp. 366-372

Abstract

We present preliminary results for a 3D finite element calculation toevaluate RF penetration in conducting dielectric materials at high field strengths. A tetrahedral mesh is used along with a Coulomb gauge constraint in a finite element method that yields excellent numerical stability at high frequencies. Accuracy is verified by comparisons withanalytic solutions for single-layer and multiple-layer heterogeneous systems and for a 3D spherical model. We have also compared the finiteelement model with experimental results presented by Foo et al., Magn. Reson. Med. 23, (1992). Agreement is very good and argues for the usefulness of the method in the calculation of RF penetration and RF power deposition effects in heterogeneous objects.

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Documento generato il 06/04/20 alle ore 07:52:54