Resolving phase ambiguity in dual-echo dixon imaging using a projected power method.

ABSTRACT:

Purpose

To develop a fast and robust method to resolve phase ambiguity in dual-echo Dixon imaging.

Methods

A major challenge in dual-echo Dixon imaging is to estimate the phase error resulting from field inhomogeneity. In this work, a binary quadratic optimization program was formulated to resolve the phase ambiguity. A projected power method was developed to efficiently solve the optimization problem. Both the 1-peak fat model and 6-peak fat model were applied to three-dimensional (3D) datasets. Additionally, the proposed method was extended to dynamic magnetic resonance imaging (MRI) applications using the 6-peak fat model. With institutional review board (IRB) approval and patient consent/assent, the proposed method was evaluated and compared with region growing on 29 con

SUBMITTER: Zhang T 

PROVIDER: S-EPMC5123983 | biostudies-literature | 2017 May

REPOSITORIES: biostudies-literature