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Radial alternating TE sequence for faster fat suppression
Author(s) -
Flask Chris A.,
Dale Brian,
Lewin Jonathan S.,
Duerk Jeffrey L.
Publication year - 2003
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.10615
Subject(s) - sequence (biology) , physics , point (geometry) , k space , mathematics , sampling (signal processing) , set (abstract data type) , nuclear magnetic resonance , optics , computer science , mathematical analysis , chemistry , geometry , biochemistry , detector , programming language , fourier transform
This study describes a steady‐state sequence that uses a radial k ‐space trajectory and alternating echo times (TEs) between even and odd k ‐space views. The sequence generated a single data set that was used to reconstruct images with inherent fat suppression. This fat suppression results from the fat phase variation in alternate echoes giving rise to cancellation in the central portion of k ‐space. This new fat‐suppression method provides inherent fat suppression in half the acquisition time relative to the radial two‐point Dixon method. The improvement in k ‐space sampling efficiency is demonstrated in phantom and clinical images, and through measured point‐spread functions (PSFs). As a result, the radial alternating TE sequence offers improved temporal resolution over a radial version of the two‐point Dixon sequence by requiring fewer total projections to obtain the same effective resolution in water‐based tissues. Magn Reson Med 50:1095–1099, 2003. © 2003 Wiley‐Liss, Inc.