Skull Modeling Effects in Conductivity Estimates Using Parametric Electrical Impedance Tomography
| cic.isFulltext | true | es |
| cic.isPeerReviewed | true | es |
| cic.lugarDesarrollo | Laboratorio de ElectrĆ³nica Industrial, Control e InstrumentaciĆ³n | es |
| cic.version | info:eu-repo/semantics/acceptedVersion | es |
| dc.date.accessioned | 2018-08-27T14:28:06Z | |
| dc.date.available | 2018-08-27T14:28:06Z | |
| dc.identifier.uri | https://digital.cic.gba.gob.ar/handle/11746/8429 | |
| dc.title | Skull Modeling Effects in Conductivity Estimates Using Parametric Electrical Impedance Tomography | en |
| dc.type | ArtĆculo | es |
| dcterms.abstract | Objective: To estimate scalp, skull, compact bone, and marrow bone electrical conductivity values based on electrical impedance tomography (EIT) measurements, and to determine the influence of skull modeling details on the estimates. Methods: We collected EIT data with 62 current injection pairs and built five 6ā8 million finite element (FE) head models with different grades of skull simplifications for four subjects, including three whose head models serve as Atlases in the scientific literature and in commercial equipment (Colin27 and EGIās Geosource atlases). We estimated electrical conductivity of the scalp, skull, marrow bone, and compact bone tissues for each current injection pair, each model, and each subject. Results: Closure of skull holes in FE models, use of simplified four-layer boundary element method-like models, and neglecting the CSF layer produce an overestimation of the skull conductivity of 10%, 10%ā20%, and 20%ā30%, respectively (accumulated overestimation of 50%ā70%). The average extracted conductivities are 288 Ā± 53 (the scalp), 4.3 Ā± 0.08 (the compact bone), and 5.5 Ā± 1.25 (the whole skull) mS/m. The marrow bone estimates showed large dispersion. Conclusion: Present EIT estimates for the skull conductivity are lower than typical literature reference values, but previous in vivo EIT results are likely overestimated due to the use of simpler models. Significance: Typical literature values of 7ā10 mS/m for skull conductivity should be replaced by the present estimated values when using detailed skull head models. We also provide subject specific conductivity estimates for widely used Atlas head models. | en |
| dcterms.creator.author | FernƔndez Corazza, Mariano | es |
| dcterms.creator.author | Turovets, Serguei | es |
| dcterms.creator.author | Luu, Phan | es |
| dcterms.creator.author | Price, Nick | es |
| dcterms.creator.author | Muravchik, Carlos Horacio | es |
| dcterms.creator.author | Tucker, Don | es |
| dcterms.extent | p. 1785-1797 | es |
| dcterms.identifier.other | doi:10.1109/TBME.2017.2777143 | es |
| dcterms.isPartOf.issue | vol. 65, no. 8 | es |
| dcterms.isPartOf.series | IEEE Transactions on Biomedical Engineering | es |
| dcterms.issued | 2017 | |
| dcterms.language | InglƩs | es |
| dcterms.license | Attribution-NonCommercial-NoDerivatives 4.0 International (BY-NC-ND 4.0) | es |
| dcterms.subject | electrical impedance tomography, skull electrical conductivity, bioimpedance, biomedical signal processing, electroencephalography | en |
| dcterms.subject.materia | IngenierĆa ElĆ©ctrica y ElectrĆ³nica | es |
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