Abstract #1330

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

Lukas M. Gottwald¹, Joao Tourais^2,3, 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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