Naslov
Low-frequency dielectric properties of the oral mucosa

Autori
Lacković, Igor ; Stare, Zoran

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
13th International Conference on Electrical Bioimpedance and 8th Conference on Electrical Impedance Tomography 2007 : ICEBI 2007 ; IFMBE Proceedings ; Vol. 17 / Scharfetter, Hermann ; Merwa, Robert - Berlin : Heidelberg : New York : Springer, 2007, 154-157

ISBN
978-3-540-73840-4

Skup
13th International Conference on Electrical Bioimpedance and 8th Conference on Electrical Impedance Tomography (13 ; 2007)

Mjesto i datum
Graz, Austrija, 29.08.2007. - 02.09.2007

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
impedance spectrum; in vivo measurement; FEM model; cell factor; probe sensitivity

Sažetak
Low-frequency (≤ 1 MHz) electrical conductivity and permittivity spectra of the oral mucosa were reconstructed from impedance measurements at various regions (tongue, buccal mucosa, hard palate) of the oral cavity. Impedance magnitude and phase were measured with the HP4284A LCR meter in the frequency range from 30 Hz to 1 MHz. Bipolar intraoral measurement probe was used. In order to obtain conductivity and permittivity spectra from measured impedance data, the geometry factor of the probe (cell factor) was determined theoretically. Namely, numerical modeling using the finite-element method was used to calculate the geometry factor. The FEM model was also used to study the sensitivity field of the probe and the penetration depth. The results show typical dispersion characteristics observed in α -, and β -dispersion range of biological tissues. Possibilities of correcting electrode polarization, which causes error at lower frequencies are considered.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika

Napomena
DOI: 10.1007/978-3-540-73841-1_42 ; ISBN (Online) 978-3-540-73841-1

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