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Extended coverage first‐pass perfusion imaging using slice‐interleaved TSENSE
Author(s) -
Kellman P.,
Derbyshire J.A.,
Agyeman K.O.,
McVeigh E.R.,
Arai A.E.
Publication year - 2004
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.10663
Subject(s) - interleaving , heartbeat , image resolution , temporal resolution , image quality , signal to noise ratio (imaging) , contrast (vision) , contrast to noise ratio , noise (video) , nuclear medicine , computer science , mathematics , physics , optics , artificial intelligence , medicine , image (mathematics) , computer security , operating system
Parallel imaging applied to first‐pass, contrast‐enhanced cardiac MR can yield greater spatial coverage for a fixed temporal resolution. The method combines rate R = 2 acceleration using TSENSE with shot‐to‐shot interleaving of two slices. The √R SNR loss is largely compensated for by a longer effective repetition time (TR) and increased flip angle associated with slice interleaving. In this manner, increased spatial coverage is achieved while comparable or better image quality is maintained. Single‐heartbeat temporal resolution was accomplished with spatial coverage of eight slices at heart rates up to 71 bpm, six slices up to 95 bpm, and four slices up to 143 bpm. Experiments in normal subjects ( N = 6) were performed to assess signal‐to‐noise ratio (SNR) and contrast‐to‐noise ratio (CNR) values. Magn Reson Med 51:200–204, 2004. Published 2003 Wiley‐Liss, Inc.