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bioRxiv · 10.1101/450676

MR-PET head motion correction based on co-registration of multi-contrast MR images

Chen, Z.·Sforazzini, F.·Baran, J.·Close, T. G.·Shah, N. J.·Egan, G. F.
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Abstract

Head motion is a major source of image artefacts in neuroimaging studies and can lead to degradation of the quantitative accuracy of reconstructed PET images. Simultaneous Magnetic Resonance-Positron Emission Tomography (MR-PET) makes it possible to estimate head motion information from high-resolution MR images and then correct motion artefacts in PET images. In this paper, we introduce a fully automated PET motion correction method, MR-guided MAF, based on the co-registration of multi-contrast MR images. The performance of the MR-guided MAF method was evaluated using MR-PET data acquired from a cohort of ten healthy participants who received a slow infusion of fluorodeoxyglucose ([18-F]FDG). Compared with conventional methods, MR guided PET image reconstruction can reduce head motion introduced artefacts and improve the image sharpness and quantitative accuracy of PET images acquired using simultaneous MR-PET scanners. The fully automated motion estimation method has been implemented as a publicly available web-service.

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Chen, Z., Sforazzini, F., Baran, J., Close, T. G., Shah, N. J., Egan, G. F.. 2018-10-24. MR-PET head motion correction based on co-registration of multi-contrast MR images. https://doi.org/10.1101/450676

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