S193 Influence of Pt/Ir electrode thickness on magnetic resonance imaging susceptibility artefacts J. B. Erhardt1, J. Leupold2, E. Fuhrer1, O. G. Gruschke1, M. C. Wapler1, J. Hennig2, J. G. Korvink1, T. Stieglitz1 Department for Microsystems Engineering, University of Freiburg, Germany 2 Department of Radiology, University Medical Center Freiburg e-Mail: firstname.lastname@example.org Magnetic resonance imaging (MRI) is already one of the most important diagnostic tools in medicine and its importance and application is still growing, especially for clinical diagnosis in patients with implants. In active implantable medical devices, metal structures such as electrodes can impair MRI in the vicinity of the neuronal structures of interest. The size of these imaging artefacts around electrodes play an important role for postoperative electrode localization used for the verification of successful placement. Dimensions of imaging artefacts depend on material, structure, geometry and orientation of the imaged object. Therefore the correlation of imaging artefact size caused by Pt/Ir electrode structures and the thickness of these electrode structures was investigated. A 25 µm thick Pt/Ir foil (Goodfellow) was structured with a Rapid10 picosecond-laser (Lumera Laser), resulting in 750 µm in diameter disc shaped electrode-like samples. To realize 6 different sample hights laser ablation across the entire
Biomedical Engineering / Biomedizinische Technik – de Gruyter
Published: Sep 1, 2015
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