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Design and application of a four-channel transmit/receive surface coil for functional cardiac imaging at 7T

Item Type:Article
Title:Design and application of a four-channel transmit/receive surface coil for functional cardiac imaging at 7T
Creators Name:Dieringer, M.A. and Renz, W. and Lindel, T. and Seifert, F. and Frauenrath, T. and von Knobelsdorff-Brenkenhoff, F. and Waiczies, H. and Hoffmann, W. and Rieger, J. and Pfeiffer, H. and Ittermann, B. and Schulz-Menger, J. and Niendorf, T.
Abstract:PURPOSE: To design and evaluate a four-channel cardiac transceiver coil array for functional cardiac imaging at 7T. MATERIALS AND METHODS: A four-element cardiac transceiver surface coil array was developed with two rectangular loops mounted on an anterior former and two rectangular loops on a posterior former. specific absorption rate (SAR) simulations were performed and a Bmath image calibration method was applied prior to obtain 2D FLASH CINE (mSENSE, R = 2) images from nine healthy volunteers with a spatial resolution of up to 1 x 1 x 2.5 mm3. RESULTS: Tuning and matching was found to be better than 10 dB for all subjects. The decoupling (S21) was measured to be >18 dB between neighboring loops, >20 dB for opposite loops, and >30 dB for other loop combinations. SAR values were well within the limits provided by the IEC. Imaging provided clinically acceptable signal homogeneity with an excellent blood-myocardium contrast applying the Bmath image calibration approach. CONCLUSION: A four-channel cardiac transceiver coil array for 7T was built, allowing for cardiac imaging with clinically acceptable signal homogeneity and an excellent blood-myocardium contrast. Minor anatomic structures, such as pericardium, mitral, and tricuspid valves and their apparatus, as well as trabeculae, were accurately delineated.
Keywords:Ultrahigh Field Cardiovascular MRI, RF Coil Design, Left Ventricular Function, 7.0 Tesla, 7T Cardiac Imaging
Source:Journal of Magnetic Resonance Imaging
Page Range:736-741
Date:March 2011
Official Publication:https://doi.org/10.1002/jmri.22451
PubMed:View item in PubMed

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