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MR-based FoV Extension of Human Attenuation Correction in Whole-Body MR/PET Hybrid Imaging

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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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https://www.ismrm.org/12/tp_02.htm
(Abstract)

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Citation

Blumhagen, J., Ladebeck, R., Fenchel, M., Quick, H., & Scheffler, K. (2012). MR-based FoV Extension of Human Attenuation Correction in Whole-Body MR/PET Hybrid Imaging. 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-A5F7-E
Abstract
In whole-body MR/PET, the human tissue attenuation correction (AC) of PET data can be based on the MR data. However, the MR FoV is limited due to B0inhomogeneities and gradient nonlinearities. Therefore, the human AC map may be truncated and thus the PET reconstruction may be biased. In this work we explored extending the MR-based AC map using a purely MR-based FoV extension. We applied this method to whole-body MR/PET examinations on patients and evaluated the impact on the PET reconstruction. The reported bias was reduced and the PET reconstruction was in good agreement with a PET/CT reference measurement.