Feasibility of aortic valve planimetry at 7 T ultrahigh field MRI: Comparison to aortic valve MRI at 3 T and 1.5 T Juliane Goebel, Felix Nensa, Haemi.

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Feasibility of aortic valve planimetry at 7 T ultrahigh field MRI: Comparison to aortic valve MRI at 3 T and 1.5 T Juliane Goebel, Felix Nensa, Haemi P. Schemuth, Stefan Maderwald, Thomas Schlosser, Stephan Orzada, Stefan Rietsch, Harald H. Quick, Kai Nassenstein European Journal of Radiology Open Volume 5, Pages 159-164 (January 2018) DOI: 10.1016/j.ejro.2018.08.008 Copyright © 2018 The Authors Terms and Conditions

Fig. 1 Aortic valve imaging in a 29-years-old female at 7 T. On the left side the aortic valve is displayed in the closed state, while on the right side it is displayed opened. TrueFISP images were considerably hampered by artefacts, while FLASH images were less hampered by artefacts and provided sufficiently high contrast between blood pool and aortic valve rim. European Journal of Radiology Open 2018 5, 159-164DOI: (10.1016/j.ejro.2018.08.008) Copyright © 2018 The Authors Terms and Conditions

Fig. 2 Aortic valve imaging in a 25-years-old male at 7 T, 3 T, and 1.5 T. TrueFISP images in general were more hampered by artefacts than were FLASH images. European Journal of Radiology Open 2018 5, 159-164DOI: (10.1016/j.ejro.2018.08.008) Copyright © 2018 The Authors Terms and Conditions

Fig. 3 Aortic valve imaging in a 24-years-old female at 7 T, 3 T, and 1.5 T. Qualitative tissue contrast of the aortic valve was better at 7 T than at 3 T or 1.5 T. European Journal of Radiology Open 2018 5, 159-164DOI: (10.1016/j.ejro.2018.08.008) Copyright © 2018 The Authors Terms and Conditions

Fig. 4 Aortic valve imaging in a 22-years-old female at 7 T. Five cine FLASH images of the aortic valve nicely demonstrate the aortic valve movement over time. European Journal of Radiology Open 2018 5, 159-164DOI: (10.1016/j.ejro.2018.08.008) Copyright © 2018 The Authors Terms and Conditions

Fig. 5 Intra-rater and inter-rater variability of the aortic valve opening area measurements. Both, intra- and inter-rater variability (visualized by Bland-Altman plots), tended to be slightly smaller at 7 T than at 3 T or 1.5 T (used sequence: FLASH). European Journal of Radiology Open 2018 5, 159-164DOI: (10.1016/j.ejro.2018.08.008) Copyright © 2018 The Authors Terms and Conditions