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Correction of phase wrapping in magnetic resonance imaging
Author(s) -
Axel Leon,
Morton Daniel
Publication year - 1989
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 - 10.1118/1.596378
Subject(s) - magnetic resonance imaging , medical imaging , phase (matter) , nuclear magnetic resonance , phase imaging , medical physics , physics , medicine , radiology , optics , quantum mechanics , microscopy
In phase reconstruction MR imaging, e.g., for velocity measurement, phase shifts beyond ±π radians will “wrap around” to smaller apparent phases. Such large phase shifts could arise either due to large background (non‐flow‐related) phase variations or due to large velocity‐induced phase shifts. For sufficiently smooth phase variation, such discontinuities can be automatically recognized and corrected, thus restoring the correct phase values and extending the effective dynamic range of such phase imaging techniques.