Experimental implementation of array-compressed parallel transmission at 7 tesla.

ABSTRACT:

Purpose

To implement and validate a hardware-based array-compressed parallel transmission (acpTx) system.

Methods

In array-compressed parallel transmission, a small number of transmit channels drive a larger number of transmit coils, which are connected via an array compression network that implements optimized coil-to-channel combinations. A two channel-to-eight coil array compression network was developed using power splitters, attenuators and phase shifters, and a simulation was performed to investigate the effects of coil coupling on power dissipation in a simplified network. An eight coil transmit array was constructed using induced current elimination decoupling, and the coil and network were validated in benchtop measurements, B1+ mapping scans, and an accelerated spi

SUBMITTER: Yan X 

PROVIDER: S-EPMC5321687 | biostudies-literature | 2016 Jun

REPOSITORIES: biostudies-literature