Evaluation of a 16-channel transceiver loop + dipole antenna array for human head imaging at 10.5 tesla.

ABSTRACT: We evaluated a 16-channel loop + dipole (LD) transceiver antenna array with improved specific absorption rate (SAR) efficiency for 10.5 Tesla (T) human head imaging apsplications. Three different array designs with equal inner dimensions were considered: an 8-channel dipole antenna, an 8-channel loop, and a 16-channel LD antenna arrays. Signal-to-noise ratio (SNR) and B₁ ⁺ efficiency (in units of μT per √W) were simulated and measured in 10.5 T magnetic resonance imaging (MRI) experiments. For the safety validation, 10 g SAR and SAR efficiency (defined as the B₁ ⁺ over √ (peak 10 g SAR)) were calculated through simulation. Finally, high resolution porcine brain images were acquired with the 16-channel LD antenna array, including a fast turbo-spin

SUBMITTER: Woo MK 

PROVIDER: S-EPMC7978235 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature