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Spatial localization combining projection presaturation with a two‐dimensional excitation pulse
Author(s) -
Lawrence Keith St.,
Lee TingYim,
Henkelman Mark
Publication year - 1998
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.1910400623
Subject(s) - pulse (music) , volume (thermodynamics) , excitation , projection (relational algebra) , signal (programming language) , chemistry , nuclear magnetic resonance , optics , physics , mathematics , computer science , algorithm , quantum mechanics , detector , programming language
Single‐shot spatial localization of short T 1 nuclei was achieved by outer volume suppression with projection presaturation followed by selective excitation of the desired volume with a two‐dimensional (2D) pulse. After the projection, presaturation with a 2D pulse avoided signal contamination from magnetization regrowth in the outer volume, whereas preceding the 2D pulse with projection presaturation reduced any unwanted excitation in the outer volume caused by the 2D pulse. The improvement in outer volume suppression achieved by combining these two techniques was demonstrated by images collected after the application of projection presaturation alone, a 2D pulse alone, and the two combined.