A 32-Channel Head Coil Array with Circularly Symmetric Geometry for Accelerated Human Brain Imaging

Ying-Hua Chu, Yi-Cheng Hsu, Boris Keil, Wen-Jui Kuo and Fa-Hsuan Lin

PLOS ONE, 2016, vol. 11, issue 2, 1-13

Abstract: The goal of this study is to optimize a 32-channel head coil array for accelerated 3T human brain proton MRI using either a Cartesian or a radial k-space trajectory. Coils had curved trapezoidal shapes and were arranged in a circular symmetry (CS) geometry. Coils were optimally overlapped to reduce mutual inductance. Low-noise pre-amplifiers were used to further decouple between coils. The SNR and noise amplification in accelerated imaging were compared to results from a head coil array with a soccer-ball (SB) geometry. The maximal SNR in the CS array was about 120% (1070 vs. 892) and 62% (303 vs. 488) of the SB array at the periphery and the center of the FOV on a transverse plane, respectively. In one-dimensional 4-fold acceleration, the CS array has higher averaged SNR than the SB array across the whole FOV. Compared to the SB array, the CS array has a smaller g-factor at head periphery in all accelerated acquisitions. Reconstructed images using a radial k-space trajectory show that the CS array has a smaller error than the SB array in 2- to 5-fold accelerations.

Date: 2016
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Persistent link: https://EconPapers.repec.org/RePEc:plo:pone00:0149446

DOI: 10.1371/journal.pone.0149446

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