Improvement of magnetic resonance phase unwrapping method based on Goldstein Branch-cut algorithm.
- Author:
Lin GUO
1
;
Lili KANG
;
Dandan WANG
Author Information
1. Department of Medical Engineering, Southern Medical University, Guangzhou, China. guolin1030@ yahoo.com.cn
- Publication Type:Journal Article
- MeSH:
Algorithms;
Magnetic Resonance Imaging;
methods
- From:
Journal of Southern Medical University
2013;33(2):239-242
- CountryChina
- Language:Chinese
-
Abstract:
The phase information of magnetic resonance (MR) phase image can be used in many MR imaging techniques, but phase wrapping of the images often results in inaccurate phase information and phase unwrapping is essential for MR imaging techniques. In this paper we analyze the causes of errors in phase unwrapping with the commonly used Goldstein Brunch-cut algorithm and propose an improved algorithm. During the unwrapping process, masking, filtering, dipole- remover preprocessor, and the Prim algorithm of the minimum spanning tree were introduced to optimize the residues essential for the Goldstein Brunch-cut algorithm. Experimental results showed that the residues, branch-cuts and continuous unwrapped phase surface were efficiently reduced and the quality of MR phase images was obviously improved with the proposed method.
