title: Are patient specific meshes required for EIT head imaging?
abstract: Head imaging with electrical impedance tomography (EIT) is usually done with time-differential measurements, to reduce time-invariant modelling errors. Previous research suggested that more accurate head models improved image quality, but no thorough analysis has been done on the required accuracy. We propose a novel pipeline for creation of precise head meshes from magnetic resonance imaging and computed tomography scans, which was applied to four different heads. Voltages were simulated on all four heads for perturbations of different magnitude, haemorrhage and ischaemia, in five different positions and for three levels of instrumentation noise. Statistical analysis showed that reconstructions on the correct mesh were on average 25% better than on the other meshes. However, the stroke detection rates were not improved. We conclude that a generic head mesh is sufficient for monitoring patients for secondary strokes following head trauma.
authors.affiliation: University College London, London WC1E 6BT, UK.
authors.forename: Markus
authors.initials: M
authors.lastname: Jehl
authors.forename: Kirill
authors.initials: K
authors.lastname: Aristovich
authors.forename: Mayo
authors.initials: M
authors.lastname: Faulkner
authors.forename: David
authors.initials: D
authors.lastname: Holder
mesh_terms: D002545:Brain Ischemia / Q000000981:diagnostic imaging / Q000503:physiopathology; D002543:Cerebral Hemorrhage / Q000000981:diagnostic imaging / Q000503:physiopathology; D003198:Computer Simulation; D017097:Electric Impedance; D006257:Head / Q000000981:diagnostic imaging* / Q000503:physiopathology; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D008279:Magnetic Resonance Imaging; D008954:Models, Biological; D057285:Precision Medicine / Q000379:methods*; D020521:Stroke / Q000000981:diagnostic imaging / Q000503:physiopathology; D014054:Tomography / Q000379:methods*