Brain imaging with improved acceleration and SNR at 7 Tesla obtained with 64-channel receive array.

ABSTRACT:

Purpose

Despite the clear synergy between high channel counts in a receive array and magnetic fields ≥ 7 Tesla, to date such systems have been restricted to a maximum of 32 channels. Here, we examine SNR gains at 7 Tesla in unaccelerated and accelerated images with a 64-receive channel (64Rx) RF coil.

Methods

A 64Rx coil was built using circular loops tiled in 2 separable sections of a close-fitting form; custom designed preamplifier boards were integrated into each coil element. A 16-channel transmitter arranged in 2 rows along the z-axis was employed. The performance of the 64Rx array was experimentally compared to that of an industry-standard 32-channel receive (32Rx) array for SNR in unaccelerated images and for noise amplification under parallel imaging.

Results

SUBMITTER: Ugurbil K 

PROVIDER: S-EPMC6491243 | biostudies-literature | 2019 Jul

REPOSITORIES: biostudies-literature