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TE interleaving: New multisection imaging technique
Author(s) -
Bishop Jonathan E.,
Plewes Donald B.
Publication year - 1991
Publication title -
journal of magnetic resonance imaging
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.563
H-Index - 160
eISSN - 1522-2586
pISSN - 1053-1807
DOI - 10.1002/jmri.1880010505
Subject(s) - interleaving , waveform , computer science , sequence (biology) , interference (communication) , pulse sequence , signal (programming language) , pulse (music) , physics , acoustics , nuclear magnetic resonance , telecommunications , channel (broadcasting) , chemistry , radar , biochemistry , detector , programming language , operating system
A new pulse sequence that increases the number of sections that can be acquired with a T2‐weighted multisection imaging prescription is presented. The sequence achieves a higher efficiency in section acquisition per unit time by interleaving excitation and data collection for up to three separate sections during the long TE (⩾ 80 msec) of a T2‐weighted spin‐echo pulse sequence. The necessary modifications of the section‐select and readout gradient waveforms for the implementation of TE‐interleaved (TEI) sequences, with and without flow compensation, are described. Secondary‐ and stimulated‐echo artifacts are present on some TEI images, but these can be controlled with appropriate spoiler gradients. The signal‐to‐noise ratio for contiguous sections is slightly reduced compared with that of a standard multisection pulse sequence. These observations indicate that the effects of radio‐frequency section interference are enhanced by the TEI sequence.