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Medical & Biological Engineering & Computing
Erschienen in: Medical & Biological Engineering & Computing 12/2009

01.12.2009 | Original Article

Forward modelling of magnetic induction tomography: a sensitivity study for detecting haemorrhagic cerebral stroke

verfasst von: M. Zolgharni, P. D. Ledger, H. Griffiths

Erschienen in: Medical & Biological Engineering & Computing | Ausgabe 12/2009

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Abstract

For a magnetic induction tomography (MIT) system operating at 10 MHz, the signals produced by a haemorrhagic cerebral stroke were computed using an anatomically realistic, multi-layer, finite element (FE) head model comprising 12 tissues. The eddy-current problem was approximated using the commercial FE package, Comsol Multiphysics, and the numerical techniques employed were validated using a benchmark test. Mesh convergence for the head model was investigated for first- and second-order elements. MIT signals were computed for strokes of different sizes and locations in the brain to judge the sensitivity of the MIT configuration. The results revealed that for a large peripheral stroke (volume 50 cm3), 27% of the signals were above the phase noise level achievable in our current data-collection hardware (≈20 m°). In order to detect the same percentage of the signals due to a centrally located small stroke, a reduction in phase noise to 1 m° was necessary.
Vorheriger Artikel Electroencephalographic spectral asymmetry index for detection of depression
Nächster Artikel Computerised electronic foetal heart rate monitoring in labour: automated contraction identification

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Metadaten
Titel
Forward modelling of magnetic induction tomography: a sensitivity study for detecting haemorrhagic cerebral stroke
verfasst von
M. Zolgharni
P. D. Ledger
H. Griffiths
Publikationsdatum
01.12.2009
Verlag
Springer-Verlag
Erschienen in
Medical & Biological Engineering & Computing / Ausgabe 12/2009
Print ISSN: 0140-0118
Elektronische ISSN: 1741-0444
DOI
https://doi.org/10.1007/s11517-009-0541-1

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