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MR‐based conductivity imaging using multiple receiver coils
Author(s) -
Lee Joonsung,
Shin Jaewook,
Kim DongHyun
Publication year - 2016
Publication title -
magnetic resonance in medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.696
H-Index - 225
eISSN - 1522-2594
pISSN - 0740-3194
DOI - 10.1002/mrm.26335
Subject(s) - scanner , signal (programming language) , imaging phantom , conductivity , electromagnetic coil , sensitivity (control systems) , phase (matter) , computer science , biomedical engineering , nuclear magnetic resonance , materials science , mathematics , physics , artificial intelligence , optics , electronic engineering , medicine , quantum mechanics , programming language , engineering
Purpose To propose a signal combination method for MR‐based tissue conductivity mapping using a standard clinical scanner with multiple receiver coils. Methods The theory of the proposed method is presented with two practical approaches, a coil‐specific approach and a subject‐specific approach. Conductivity maps were reconstructed using the transceive phase of the combined signal. The sensitivities of the coefficients used for signal combination were analyzed and the method was compared with other signal combination methods. For validation, multiple receiver brain coils and multiple receiver breast coils were used in phantom, in vivo brain, and in vivo breast studies. Results The variation among the conductivity estimates was <15% as determined by the coefficient sensitivity tests. Compared with other signal combination methods, the proposed method yielded fewer artifacts in the conductivity estimates. Conclusion MR‐based tissue conductivity mapping is feasible when using a standard clinical MR scanner with multiple receiver coils. The proposed method reduces systematic errors in phase‐based conductivity mapping that can occur due to the inhomogeneous magnitude of the combined receive profile. Magn Reson Med 76:1–2, 2016. © 2015 Wiley Periodicals, Inc.