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Abstract #1330

Retrospective camera-based respiratory binning for 4D flow MRI – A comparison with liver navigator and self-gating

Lukas M. Gottwald1, Joao Tourais2,3, Eva S. Peper1, Jouke Smink2, Bram F. Coolen4, Gustav J. Strijkers4, Pim van Ooij1, and Aart J. Nederveen1
1Radiology and Nuclear Medicine, Amsterdam UMC, Amsterdam, Netherlands, 2MR R&D – Clinical Science, Philips Healthcare, Best, Netherlands, 3Department of Biomedical Engineering, University of Technology, Eindhoven, Netherlands, 4Biomedical Engineering and Physics, Amsterdam UMC, Amsterdam, Netherlands

This study aimed to compare the performance of the novel camera-based respiratory navigation sensor (VitalEye) in retrospective respiratory binned Cartesian 4D flow MRI to conventional liver navigator and self-gating. Analyzed were the cross-correlation of the respiratory signals, peak flow rate error compared to 2D flow and the image quality in terms of edge sharpness of the liver/diaphragm border and signal-to-noise ratio. The novel camera-based respiratory navigation sensor VitalEye performed as good as conventional liver navigator and self-gating. Respiratory signal, flow rate error, and image quality showed no significant difference, but VitalEye has the advantage of a 10-times higher sampling frequency.

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