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Multi‐Shot EPI for Improvement of Myocardial Tag Contrast: Comparison with Segmented SPGR
Author(s) -
Tang Chao,
Mcveigh Elliot R.,
Zerhouni Elias A.
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.1910330321
Subject(s) - contrast (vision) , imaging phantom , nuclear medicine , medicine , nuclear magnetic resonance , physics , computer science , artificial intelligence
To assess the potential value of multi‐shot EPI relative to segmented k ‐space SPGR for myocardial tagging, we measured tag contrast for both sequences in a phantom and human study and compared it with theoretical predictions. In the human heart, EPI tag contrast was three times that of SPGR at the end of systole. Tag duration was lengthened with EPI to at least 600 ms. In addition, the entire heart was examined in a total of 32 heartbeats with EPI versus 152 heartbeats with SPGR.