Cardiac magnetic resonance imaging at 7 Tesla

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Item Type:	Article
Title:	Cardiac magnetic resonance imaging at 7 Tesla
Creators Name:	Stäb, D., Al Najjar, A., O'Brien, K., Strugnell, W., Richer, J., Rieger, J., Niendorf, T. and Barth, M.
Abstract:	CMR at an ultra-high field (magnetic field strength B0 ≥ 7 Tesla) benefits from the signal-to-noise ratio (SNR) advantage inherent at higher magnetic field strengths and potentially provides improved signal contrast and spatial resolution. While promising results have been achieved, ultra-high field CMR is challenging due to energy deposition constraints and physical phenomena such as transmission field non-uniformities and magnetic field inhomogeneities. In addition, the magneto-hydrodynamic effect renders the synchronization of the data acquisition with the cardiac motion difficult. The challenges are currently addressed by explorations into novel magnetic resonance technology. If all impediments can be overcome, ultra-high field CMR may generate new opportunities for functional CMR, myocardial tissue characterization, microstructure imaging or metabolic imaging. Recognizing this potential, we show that multi-channel radio frequency (RF) coil technology tailored for CMR at 7 Tesla together with higher order B0 shimming and a backup signal for cardiac triggering facilitates high fidelity functional CMR. With the proposed setup, cardiac chamber quantification can be accomplished in examination times similar to those achieved at lower field strengths. To share this experience and to support the dissemination of this expertise, this work describes our setup and protocol tailored for functional CMR at 7 Tesla.
Keywords:	Heart, Magnetic Fields, Magnetic Resonance Imaging, Myocardium, Radio Waves, Signal-To-Noise Ratio
Source:	Journal of Visualized Experiments
ISSN:	1940-087X
Publisher:	JoVE
Number:	143
Page Range:	e55853
Date:	6 January 2019
Official Publication:	https://doi.org/10.3791/55853
PubMed:	View item in PubMed

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