MR-based FoV Extension in Whole-Body MR/PET Using Continuous Table Move

Blumhagen, JO; Ladebeck, R; Fenchel, M; Scheffler, K; Quick, HH

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MR-based FoV Extension in Whole-Body MR/PET Using Continuous Table Move

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Scheffler, K
Department High-Field Magnetic Resonance, Max Planck Institute for Biological Cybernetics, Max Planck Society;
Max Planck Institute for Biological Cybernetics, Max Planck Society;

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Citation

Blumhagen, J., Ladebeck, R., Fenchel, M., Scheffler, K., & Quick, H. (2012). MR-based FoV Extension in Whole-Body MR/PET Using Continuous Table Move. Poster presented at 20th Annual Meeting and Exhibition of the International Society for Magnetic Resonance in Medicine (ISMRM 2012), Melbourne, Australia.

Cite as: https://hdl.handle.net/21.11116/0000-0001-A5F0-5

Abstract

In whole-body MR/PET attenuation correction, an MR-based FoV extension is of emerging interest. However, gradient nonlinearities and B0 inhomogeneities often hamper an accurate spatial encoding at the edges of large FoVs. Recently, we proposed a method to axially extend the FoV by determining an optimal readout gradient field which locally compensates B0 inhomogeneities and gradient nonlinearities. In this work a combination of the mentioned axial FoV extension and Continuous Table Movement is presented. In experiments on volunteers a significant distortion reduction has been achieved at off-center positions of up to 300 mm off from the iso-center.