Abstract #2658

Optimal array configuration for cerebral cortex MRI at 7T: six center-fed dipoles with two loops RF coil array

Jérémie Daniel Clément¹, Rolf Gruetter^1,2,3, and Özlem Ipek⁴

¹CIBM - LIFMET, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland, ²Department of Radiology, University of Geneva, Geneva, Switzerland, ³Department of Radiology, University of Lausanne, Lausanne, Switzerland, ⁴CIBM-AIT, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland

Searching for optimal RF coil array for whole-brain MR applications, central-fed dipole was compared with fractionated dipole in a single and RF coil array configurations with combination of loop coils in measurements and electromagnetic field simulations in terms of B₁⁺ transmit efficiency, field uniformity, SAR and mutual coupling in an array. High transmit field performances were shown over the cerebral cortex by using phase-only shimming with six center-fed dipoles with two loops RF coil array on experimentally measured B₁⁺-maps and anatomical MR images.

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