Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
A multichannel continuously selectable multifrequency electrical impedancespectroscopy measurement system
Autore:
Hartov, A; Mazzarese, RA; Reiss, FR; Kerner, TE; Osterman, KS; Williams, DB; Paulsen, KD;
Indirizzi:
Dartmouth Coll, Thayer Sch Engn, Hanover, NH 03755 USA Dartmouth Coll Hanover NH USA 03755 hayer Sch Engn, Hanover, NH 03755 USA Dartmouth Coll, Hitchcock Med Ctr, Norris Cotton Canc Ctr, Lebanon, NH 03756 USA Dartmouth Coll Lebanon NH USA 03756 otton Canc Ctr, Lebanon, NH 03756 USA Dartmouth Med Sch, Lebanon, NH 03756 USA Dartmouth Med Sch Lebanon NH USA03756 uth Med Sch, Lebanon, NH 03756 USA
Titolo Testata:
IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING
fascicolo: 1, volume: 47, anno: 2000,
pagine: 49 - 58
SICI:
0018-9294(200001)47:1<49:AMCSME>2.0.ZU;2-K
Fonte:
ISI
Lingua:
ENG
Soggetto:
DIELECTRIC-PROPERTIES; BIOLOGICAL TISSUES; TOMOGRAPHY; HYPERTHERMIA; MEDICINE; SPECTRA; SECTION;
Keywords:
electrical impedance spectroscopy (EIS); electrode measurement system; impedance imaging; multifrequency selection;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Engineering, Computing & Technology
Citazioni:
36
Recensione:
Indirizzi per estratti:
Indirizzo: Paulsen, KD Dartmouth Coll, Thayer Sch Engn, Hanover, NH 03755 USA Dartmouth Coll Hanover NH USA 03755 gn, Hanover, NH 03755 USA
Citazione:
A. Hartov et al., "A multichannel continuously selectable multifrequency electrical impedancespectroscopy measurement system", IEEE BIOMED, 47(1), 2000, pp. 49-58

Abstract

There is increasing evidence that alterations in the electrical property spectrum of tissues below 10 MHz is diagnostic for tissue pathology and/or pathophysiology. Yet, the complexity associated with constructing a high-fidelity multichannel, multifrequency data acquisition instrument has Limited widespread development of spectroscopic electrical impedance imaging concepts. To contribute to the relatively sparse experience with multichannel spectroscopy systems this paper reports on the design, realization and evaluation of a prototype 32-channel instrument. The salient features of the system include a continuously selectable driving frequency up to 1 MHz, either voltage or current source modes of operation and simultaneous measurement ofboth voltage and current on each channel in either of these driving configurations. Comparisons of performance with recently reported fixed-frequencysystems is favorable. Volts dc (VDC) signal-to-noise ratios of 75-80 dB are achieved and the noise floor for ac signals is near 100 dB below the signal strength of interest at 10 kHz and 60 dB down at 1 MHz. The added benefit of being able to record multispectral information on source and sense signal amplitudes and phases has also been realized. Phase-sensitive detectionschemes and multiperiod undersampling techniques have been deployed to ensure measurement fidelity over the full bandwidth of system operation.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 16/07/20 alle ore 06:27:46