title: Exploratory study on the methodology of fast imaging of unilateral stroke lesions by electrical impedance asymmetry in human heads.
abstract: Stroke has a high mortality and disability rate and should be rapidly diagnosed to improve prognosis. Diagnosing stroke is not a problem for hospitals with CT, MRI, and other imaging devices but is difficult for community hospitals without these devices. Based on the mechanism that the electrical impedance of the two hemispheres of a normal human head is basically symmetrical and a stroke can alter this symmetry, a fast electrical impedance imaging method called symmetrical electrical impedance tomography (SEIT) is proposed. In this technique, electrical impedance tomography (EIT) data measured from the undamaged craniocerebral hemisphere (CCH) is regarded as reference data for the remaining EIT data measured from the other CCH for difference imaging to identify the differences in resistivity distribution between the two CCHs. The results of SEIT imaging based on simulation data from the 2D human head finite element model and that from the physical phantom of human head verified this method in detection of unilateral stroke.
authors.affiliation: Department of Biomedical Engineering, Fourth Military Medical University, Xi'an 710032, China.
authors.forename: Jieshi
authors.identifier: 0000-0002-0938-9847
authors.initials: J
authors.lastname: Ma
authors.affiliation: Department of Biomedical Engineering, Fourth Military Medical University, Xi'an 710032, China.
authors.forename: Canhua
authors.initials: C
authors.lastname: Xu
authors.affiliation: Department of Biomedical Engineering, Fourth Military Medical University, Xi'an 710032, China.
authors.forename: Meng
authors.initials: M
authors.lastname: Dai
authors.affiliation: Department of Biomedical Engineering, Fourth Military Medical University, Xi'an 710032, China.
authors.forename: Fusheng
authors.initials: F
authors.lastname: You
authors.affiliation: Department of Biomedical Engineering, Fourth Military Medical University, Xi'an 710032, China.
authors.forename: Xuetao
authors.initials: X
authors.lastname: Shi
authors.affiliation: Department of Biomedical Engineering, Fourth Military Medical University, Xi'an 710032, China.
authors.forename: Xiuzhen
authors.identifier: 0000-0002-6575-4204
authors.initials: X
authors.lastname: Dong
authors.affiliation: Department of Biomedical Engineering, Fourth Military Medical University, Xi'an 710032, China.
authors.forename: Feng
authors.identifier: 0000-0003-0547-7601
authors.initials: F
authors.lastname: Fu
mesh_terms: D017097:Electric Impedance; D006257:Head / Q000000981:diagnostic imaging; D006801:Humans; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D019047:Phantoms, Imaging; D020521:Stroke / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000503:physiopathology; D013997:Time Factors; D014057:Tomography, X-Ray Computed / Q000295:instrumentation / Q000379:methods