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Titolo:
AN ITERATIVE NEWTON-RAPHSON METHOD TO SOLVE THE INVERSE ADMITTIVITY PROBLEM
Autore:
EDIC PM; ISAACSON D; SAULNIER GJ; JAIN H; NEWELL JC;
Indirizzi:
GE CO,CORP RES & DEV,POB 8 SCHENECTADY NY 12309 RENSSELAER POLYTECH INST,DEPT MATH SCI TROY NY 12180 RENSSELAER POLYTECH INST,DEPT ELECT & COMP SYST ENGN TROY NY 12180 EPIC SYST CORP MADISON WI 53711 RENSSELAER POLYTECH INST,DEPT BIOMED ENGN TROY NY 12180
Titolo Testata:
IEEE transactions on biomedical engineering
fascicolo: 7, volume: 45, anno: 1998,
pagine: 899 - 908
SICI:
0018-9294(1998)45:7<899:AINMTS>2.0.ZU;2-T
Fonte:
ISI
Lingua:
ENG
Soggetto:
ELECTRICAL-IMPEDANCE TOMOGRAPHY; CURRENT COMPUTED-TOMOGRAPHY; ELECTRODE MODELS; UNIQUENESS;
Keywords:
CONDUCTIVITY; IMPEDANCE IMAGING; ITERATIVE RECONSTRUCTION METHODS; LEAST-SQUARES RECONSTRUCTION METHODS; PERMITTIVITY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
19
Recensione:
Indirizzi per estratti:
Citazione:
P.M. Edic et al., "AN ITERATIVE NEWTON-RAPHSON METHOD TO SOLVE THE INVERSE ADMITTIVITY PROBLEM", IEEE transactions on biomedical engineering, 45(7), 1998, pp. 899-908

Abstract

By applying electrical currents to the exterior of a body using electrodes and measuring the voltages developed on these electrodes, it is possible to reconstruct the electrical properties inside the body. This technique is known as electrical impedance tomography, The problem is nonlinear and ill conditioned meaning that a large perturbation in the electrical properties far away from the electrodes produces a smallvoltage change on the boundary of the body, This paper describes an iterative reconstruction algorithm that yields approximate solutions ofthe inverse admittivity problem in two dimensions. By performing multiple iterations, errors in the conductivity and permittivity reconstructions that result from a linearized solution to the problem are decreased. A finite-element forward-solver, which predicts voltages on the boundary of the body given knowledge of the applied current on the boundary and the electrical properties within the body, is required at each step of the reconstruction algorithm. Reconstructions generated from numerical data are presented that demonstrate the capabilities of this algorithm.

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Documento generato il 01/06/20 alle ore 01:44:02