Accelerating fully phase-encoded MRI near metal using multiband radiofrequency excitation.

ABSTRACT:

Purpose

To develop a multiband radiofrequency (RF) excitation strategy for simultaneous excitation of multiple RF offsets to accelerate fully phase-encoded imaging near metallic prostheses.

Methods

Multiband RF excitation was designed and incorporated into a spectrally resolved fully phase-encoded (SR-FPE) imaging scheme. A triband (-6, 0, 6 kHz) acquisition was compared with three separate single-band acquisitions at the corresponding RF offsets with a phantom containing the head of a hip prosthesis. In vivo multiband data with continuous spectral coverage were acquired in the knee of a healthy volunteer with the head of a hip prosthesis placed posteriorly and in a volunteer with a total knee prosthetic implant.

Results

Phantom images acquired with triband excitation

SUBMITTER: Artz NS 

PROVIDER: S-EPMC5537622 | biostudies-literature | 2017 Mar

REPOSITORIES: biostudies-literature