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Titolo: IMPEDANCE TOMOGRAPHY  COMPUTATIONAL ANALYSIS BASED ON FINITEELEMENTMODELS OF A CYLINDER AND A HUMAN THORAX
Autore: SHAHIDI AV; GUARDO R; SAVARD P;
 Indirizzi:
 ECOLE POLYTECH,INST BIOMED ENGN,POB 6079,STN A MONTREAL PQ H3C 3A7 CANADA ECOLE POLYTECH,INST BIOMED ENGN MONTREAL PQ H3C 3A7 CANADA UNIV MONTREAL MONTREAL PQ CANADA
 Titolo Testata:
 Annals of biomedical engineering
fascicolo: 1,
volume: 23,
anno: 1995,
pagine: 61  69
 SICI:
 00906964(1995)23:1<61:ITCAB>2.0.ZU;2L
 Fonte:
 ISI
 Lingua:
 ENG
 Soggetto:
 RECONSTRUCTION;
 Keywords:
 IMPEDANCE IMAGING; EDEMA MONITORING; FINITE ELEMENT MODELING;
 Tipo documento:
 Article
 Natura:
 Periodico
 Settore Disciplinare:
 Science Citation Index Expanded
 Citazioni:
 24
 Recensione:
 Indirizzi per estratti:



 Citazione:
 A.V. Shahidi et al., "IMPEDANCE TOMOGRAPHY  COMPUTATIONAL ANALYSIS BASED ON FINITEELEMENTMODELS OF A CYLINDER AND A HUMAN THORAX", Annals of biomedical engineering, 23(1), 1995, pp. 6169
Abstract
A direct image reconstruction method of electrical impedance tomography (EIT) is evaluated using threedimensional (3D) finite element models of cylindrical and torsoshaped volume conductors. The cylindricalmodel is used to examine the effect of electrode configurations and the sensitivity to offplane objects and to noise in the measured data. It is also used to validate the modeling procedures by comparison with experimental data acquired from a similar cylindrical tank filled with saline. Simulation results show only minor differences in performance between the various electrode configurations. In the second part, arealistic human thorax model constructed from CT images is used to evaluate monitoring of pulmonary edema by EIT. The conductivity, volume,and vertical position of an abnormal region in the lungs are varied to simulate the progress of edema. Dynamic EIT images are reconstructedfrom data computed for the inhomogeneous thorax (heart and lungs) as the reference set and a realistic amount of noise is added to reproduce the conditions in which the technique would be used in practice. Simulation results show that a 10 ml edema region with a conductivity equal to that of blood can be detected at a 40 dB signaltonoise ratio (SNR). Detection of a smaller volume, in the order of 2 ml, should be possible by improving either the instrumentation to achieve 60 dB SNR or the performance of reconstruction algorithms.
ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/07/20 alle ore 22:36:29