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Abstract #3009

Evaluation of Positive Contrast Around SPIO-Loaded Polymer Threads for Surgical Mesh Delineation by MRI

Hank C. W. Donker1, Nils A. Krmer2, Jens Otto3, Ioana Slabu4, Martin Baumann4, Uwe Klinge3, Christiane K. Kuhl2

1Department of Diagnostic Radiology , RWTH Aachen University, Aachen, NRW, Germany; 2Department of Diagnostic Radiology, RWTH Aachen University, Aachen, NRW, Germany; 3Department of Chirurgy, RWTH Aachen University, Aachen, NRW, Germany; 4Helmholtz Institute for Applied Medical Engineering, RWTH Aachen University, Aachen, NRW, Germany

Surgical textile mesh implants for abdominal hernia repair are hard to delineate in MRI. To improve MR-visualization, superparamagnetic iron oxides (SPIO) were implanted in the mesh polymer base material. SPIO generate magnetic susceptibility gradients. To discriminate SPIO induced voids from proton-free structures positive contrast susceptibility imaging was developed. Here 4 ways to generate positive contrast from susceptibility gradients were compared: IRON, FLAPS, white-marker imaging and SGM. The acquisition of a gradient echo image with a calculated Short Term Fourier Transform Susceptibility Gradient Map image is to be preferred for positive contrast imaging of SPIO loaded hernia meshes.