Time-Difference Electrical Impedance Tomography with a Blood Flow Model as Prior Information for Stroke Monitoring

Autor(es)

Beraldo, R. G. ; Moura, F. S. ; Bastos-Filho, TF ; Caldeira, EMD ; Frizera-Neto, A

• Tipo de documento: Artigo Científico
• Fonte: XXVII BRAZILIAN CONGRESS ON BIOMEDICAL ENGINEERING, CBEB 2020; v. N/A, p. 6-pg., 2022-01-01.

Resumo

Continuous monitoring of brain hemodynamics is important to quickly detect changes in healthy cerebral blood flow, helping physician decision-making in the treatment of the patient. Resistivity changes in the brain happen as a result of the pulsatile characteristic of the blood in the arteries or pathological conditions such as ischemia. We developed a dynamic model of cerebral circulation capable of portraying variations in resistivities in arteries within a cardiac cycle. From the hypothesis that the resistivity changes in the brain can be detected by Electrical Impedance Tomography (EIT), we included this model as prior information in time-difference image reconstruction algorithm. With this prior information, image reconstruction of the brain with pre-existing ischemia was possible, showing that EIT is a potential technique for brain hemodynamic monitoring. (AU)

• Processo FAPESP: 17/18378-0 - Monitoração da hemodinâmica encefálica utilizando a tomografia de impedância elétrica
• Beneficiário: Roberto Gutierrez Beraldo
• Modalidade de apoio: Bolsas no Brasil - Mestrado
• Processo FAPESP: 19/09154-7 - Construção de modelos dinâmicos da circulação cerebral para tomografia de impedância elétrica aplicada na classificação e monitoramento de acidentes vasculares cerebrais
• Beneficiário: Fernando Silva de Moura
• Modalidade de apoio: Bolsas no Exterior - Pesquisa