DC artifact correction for arbitrary phase-cycling sequence

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In magnetic resonance imaging (MRI), a non-zero offset in the receiver baseline signal during acquisition results in a bright spot or a line artifact in the center of the image known as a direct current (DC) artifact. Several methods have been suggested in the past for the removal or correction of DC artifacts in MR images, however, these methods cannot be applied directly when a specific phase-cycling technique is used in the imaging sequence. In this work, we proposed a new, simple technique that enables correction of DC artifacts for any arbitrary phase-cycling imaging sequences. The technique is composed of phase unification, DC offset estimation and correction, and phase restoration. The feasibility of the proposed method was demonstrated via phantom and in vivo experiments with a multiple phase-cycling balanced steady-state free precession (bSSFP) imaging sequence. Results showed successful removal of the DC artifacts in images acquired using bSSFP with phase-cycling angles of 0, 90,180, and 270, indicating potential feasibility of the proposed method to any imaging sequence with arbitrary phase-cycling angles. (C) 2016 Elsevier Inc. All rights reserved.
Publisher
ELSEVIER SCIENCE INC
Issue Date
2017-05
Language
English
Article Type
Article
Keywords

STATE FREE PRECESSION; ASCENDING/DESCENDING DIRECTIONAL NAVIGATION; STEADY-STATE; BALANCED SSFP; TRANSVERSE MAGNETIZATION; HUMAN BRAIN; FMRI; MRI; QUANTIFICATION

Citation

MAGNETIC RESONANCE IMAGING, v.38, pp.21 - 26

ISSN
0730-725X
DOI
10.1016/j.mri.2016.12.015
URI
http://hdl.handle.net/10203/223588
Appears in Collection
EE-Journal Papers(저널논문)BiS-Journal Papers(저널논문)
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