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S l ' M M A K Y Magnolie induclion tomogruphy (MIT) ;ums ,il ihc dctermmation of the irequency dependence ot ihc ckvtrical pwperties in a target objcct using alternalmg mugnelie fields. Applications are e.g. the non-in\asivc monitoring of brain oedema. A Software package hus been developed which makes possible lo lalculütc the magnetic field distribution in objecls wilh1 complcx geometries and the related induced voltages in the receiver coils vvith the finite element (FE) method. I ho Software was validaled vvith previously published oxpomnental data. The agreement of the measured and siniulated data was very good. The generation of anatoinically roalistic electromagnetic forward models oan ho oonsidered an important step towards the solution of the inverse problem of MIT. HNLniTL'NG Magnetische Induktions-Tomographie ist eine nichtmvasive und berührungslose Methode für die Rekonstruktion der Änderung der komplexen Leitfähigkeit = +) in einem bestimmten Zielgebiet [ l j . Dieses Verfahren eignet sich grundsätzlich zur Detektion von Hirnödemen, da im Gegensatz zu elektrodengebundenen Methoden das magnetische Feld den Sehädelknochen leicht durchdringt. Gemessen wird die Störung eines primären Wechselfeldes B0, welches mit Hilfe einer Erregerspule in das Zielobjekt eingekoppelt wird. Die entsprechenden in der Hmpfangerspule induzierten Spannungen AV und V0 beinhalten
Biomedizinische Technik / Biomedical Engineering – de Gruyter
Published: Jan 1, 2003
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