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Modified PROPELLER approach for T 2 ‐mapping of the abdomen
Author(s) -
Deng Jie,
Larson Andrew C.
Publication year - 2009
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.21989
Subject(s) - propeller , imaging phantom , sensitivity (control systems) , computer science , image quality , fast spin echo , artifact (error) , abdomen , physics , computer vision , acoustics , artificial intelligence , image (mathematics) , magnetic resonance imaging , optics , radiology , medicine , geology , engineering , oceanography , electronic engineering
Abstract Quantitative abdominal T 2 measurements may be useful for lesion differentiation and functional tissue characterization. However, T 2 mapping of the abdomen with conventional spin‐echo (SE) and turbo‐spin‐echo (TSE) approaches can be challenging due to physiologic motion artifacts. Multishot TSE‐based PROPELLER (Periodically Rotated Overlapping ParallEL Lines with Enhanced Reconstruction) can provide superior image quality due to reduced sensitivity to motion artifacts. With echo‐reordering to accurately estimate effective echo times and an extended slice thickness ratio to reduce stimulated echo effects, a modified PROPELLER approach may permit accurate, robust abdominal T 2 measurements. We validated the accuracy of our modified PROPELLER T 2 ‐mapping approach by comparison to conventional SE measurements in a phantom model and demonstrated the feasibility of acquiring accurate, high‐quality abdominal T 2 maps in normal volunteers. Magn Reson Med 61:1269–1278, 2009. © 2009 Wiley‐Liss, Inc.