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Titolo:
TEMPERATURE-FIELD ESTIMATION USING ELECTRICAL-IMPEDANCE PROFILING METHODS .1. RECONSTRUCTION ALGORITHM AND SIMULATED RESULTS
Autore:
PAULSEN KD; MOSKOWITZ MJ; RYAN TP;
Indirizzi:
DARTMOUTH COLL,THAYER SCH ENGN HANOVER NH 03755 DARTMOUTH COLL SCH MED LEBANON NH 00000 NORRIS COTTON CANC CTR LEBANON NH 00000
Titolo Testata:
International journal of hyperthermia
fascicolo: 2, volume: 10, anno: 1994,
pagine: 209 - 228
SICI:
0265-6736(1994)10:2<209:TEUEPM>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
QUALITY ASSURANCE GUIDELINES; CURRENT COMPUTED-TOMOGRAPHY; INTERSTITIAL HYPERTHERMIA; NONINVASIVE THERMOMETRY; MOLECULAR-DIFFUSION; TISSUE TEMPERATURE; SYSTEM;
Keywords:
TEMPERATURE ESTIMATION; IMPEDANCE IMAGING; RECONSTRUCTION ALGORITHM; INVERSE PROFILING; FINITE ELEMENTS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
44
Recensione:
Indirizzi per estratti:
Citazione:
K.D. Paulsen et al., "TEMPERATURE-FIELD ESTIMATION USING ELECTRICAL-IMPEDANCE PROFILING METHODS .1. RECONSTRUCTION ALGORITHM AND SIMULATED RESULTS", International journal of hyperthermia, 10(2), 1994, pp. 209-228

Abstract

Algorithmic methods for estimating complete temperature fields duringhyperthermia treatments based on surface and internal electrical measurements are presented. The techniques utilized draw upon impedance imaging concepts, but rather than limit the measurements to positions onthe body surface, internal impedance recording sites are allowed. Theoretical simulations show that this strategy improves the reconstructed image in the target region when either internal measurement locations are added to a given number of external recording sites or some external measurement locations are replaced by internal recording positions. The algorithms developed are tested on a set of problems with increasing levels of complexity. The culmination of these investigations isa complete simulation of a hyperthermia treatment and reconstruction of a thermal image for a body cross-section of an actual cancer patient. The results of this work suggest that the surface plus internal measurement approach holds some promise as a method for estimating temperature distributions during hyperthermia treatments. However, the simulations while promising are idealizations in that they are two-dimensional with modest levels of additive noise. In a companion paper, we explore the viability of this approach in several laboratory phantom experiments which include both static and heat-induced transient electrical property profiles.

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Documento generato il 02/07/20 alle ore 22:28:54