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Total inhomogeneity correction including chemical shifts and susceptibility by view angle tilting
Author(s) -
Cho Z. H.,
Kim D. J.,
Kim Y. K.
Publication year - 1988
Publication title -
medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.473
H-Index - 180
eISSN - 2473-4209
pISSN - 0094-2405
DOI - 10.1118/1.596162
Subject(s) - simultaneity , amplitude , physics , compensation (psychology) , optics , field (mathematics) , magnetic susceptibility , magnetic field , nuclear magnetic resonance , computational physics , classical mechanics , condensed matter physics , mathematics , quantum mechanics , psychoanalysis , pure mathematics , psychology
A correction technique of the total magnetic field inhomogeneity effects including the localized object induced inhomogeneities such as chemical shift and susceptibility is developed and its usefulness is experimentally demonstrated. With this new and simple technique all the inhomogeneity induced artifacts can be corrected simultaneously. The basic idea of this method is to add a compensation gradient of the same amplitude as the selection gradient in simultaneity with the reading gradient in such a way that the view angle is tilted. Thereby all the inhomogeneity induced geometrical shifts and hence the intensity changes are corrected, since the addition of the compensation which is independent from the field inhomogeneities including both chemical shifts and susceptibility. This technique has been theoretically examined and its usefulness is demonstrated by experiments.