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Abstract #4267

Quantification of microscopic spatial resolution on MR-scanners using micro-phantoms manufactured with Deep-Xray Lithography

Andreas Georg Berg1 and Martin Börner2
1Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, Vienna, Austria, 2Karlsruhe Nano Micro Facility (KNMF), Karlsruhe Institute of Technology (KIT), Eggenstein-Leopoldshafen, Germany

Quality control for systematic improvements in spatial resolution up to the microscopy range becomes increasingly relevant not only for preclinical imaging but also for High Field MR human scanners. The design, manufacturing technology, a prototype phantom and an exemplary evaluation for qualitative and quantitative measurement of the spatial resolution of MR-scanners claimed to offer spatial resolutions better than 100µm is presented. The spatial resolution for 2D-FT anisotropic imaging can be checked qualitatively and quantitatively by interpolation of the Modulation-Transfer-Function in two different spatial encoding directions at the same time with slice-thickness below 120µm up to 64 line-pairs/mm (pixel-size: 8µm).

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