Abstract #4618

8-channel dipole array for 7 Tesla neonatal brain and cardiac MRI

Jérémie Daniel Clément¹, Raphael Tomi-Tricot², Ryan Satnarine¹, Jeffrey Hand¹, Shaihan Malik^1,3, Irena Zivkovic⁴, Andrew Webb⁴, Jo Hajnal¹, and Özlem Ipek¹

¹Biomedical Engineering Department, School of Biomedical Engineering and Imaging Sciences, King's College London, London, United Kingdom, ²MR Research Collaborations, Siemens Healthcare Limited, Frimley, United Kingdom, ³Centre for the Developing Brain, School of Biomedical Engineering and Imaging Sciences, King's College London, London, United Kingdom, ⁴Department of Radiology, Leiden University Medical Center, Leiden, Netherlands

An 8-channel dipole array was investigated for neonatal brain and cardiac MR imaging at 7T. The coil array was compared using electromagnetic field simulations to a single-channel birdcage coil on a realistic baby model for brain and cardiac imaging. B₁⁺-efficiency and SAR_10g were evaluated. The dipole coil array demonstrated significant lower SAR_10g levels for both imaging positions. The working of the constructed dipole array was assessed on adult head. We conclude that dipole arrays are a valuable approach for neonatal brain and cardiac MR imaging at 7T, and could be part of future ethics approval of a neonatal MRI application.

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