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Chemical‐shift artifact correction scheme using echo‐time encoding technique
Author(s) -
Cho Z. H.,
Nalcioglu O.,
Park H. W.,
Ra J. B.,
Hilal S. K.
Publication year - 1985
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.1910020308
Subject(s) - artifact (error) , encoding (memory) , projection (relational algebra) , computer science , pulse sequence , resolution (logic) , artificial intelligence , computer vision , algorithm , nuclear magnetic resonance , physics
An investigation has been undertaken to study the effects of chemical shift on NMR image obtained by the projection reconstruction technique. Mathematical simulation studies indicate that chemical shift causes blurring in NMR images regardless of the image reconstruction technique. A systematic study of such artifacts is presented and possible correction schemes are proposed. Exemplary results with and without correction of the chemical‐shift artifact and pulse schemes employed for projection reconstruction are presented. The present chemical‐shift correction scheme is basically the same as a spectroscopic imaging technique such as the existing 4‐D NMR imaging method except that the encoding steps required can be reduced substantially in the case of modest spectroscopic resolution.