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Double‐echo three‐point‐dixon method for fat suppression MRI
Author(s) -
Szumowski Jerzy,
Coshow William,
Li Fang,
Coombs Bernard,
Quinn Stephen F.
Publication year - 1995
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.1910340118
Subject(s) - echo (communications protocol) , nuclear magnetic resonance , magnetic resonance imaging , nuclear medicine , medicine , physics , radiology , computer science , computer network
A double‐echo two‐excitation pulse sequence encoding fat and water signals for a phase‐sensitive three‐point Dixon‐type analysis (DE‐3PD) was developed and implemented on a 1.5 T MR imager. Data processing was performed using a previously developed two‐dimensional (2D) region‐growing algorithm, adapted to use double‐echo data. Density‐, T 1 , and T 2 ‐weighted fat suppression images were obtained from six volunteers using the new fat suppression method. The images were compared with corresponding images obtained using frequency‐selective excitation fat suppression (FAT‐SAT) and a single‐echo three‐point‐Dixon method (SE‐3PD). The results demonstrate that the DE‐3PD sequence shortens the imaging time by one‐third compared with the SE‐3PD method, without loss in image quality. The data also show that a 2D region‐growing algorithm effectively unwraps the phase of DE‐3PD data sets, and that results of DE‐3PD fat signal suppression are consistently better than those obtained using a standard FATSAT method. The authors conclude that the double‐echo sequence provides density‐, T 1 , and T 2 ‐weighted images that appear to be promising for routine clinical applications.