Designing a Hyperbolic Secant Excitation Pulse to Reduce Signal Dropout in 2D Gradient Echo Imaging at 7T
Stephen James Wastling 1 , Mark Symms 2 , Mauro Costagli 3,4 , Laura Biagi 3,4 , Mirco Cosottini 3,5 , Gareth John Barker 1 , and Michela Tosetti 3,4
Department of Neuroimaging, King's College
London, London, United Kingdom,
Healthcare, Pisa, Italy,
Stella Maris, Pisa, Italy,
of Translational Research and New Technologies in
Medicine and Surgery, University of Pisa, Pisa, Italy
A method of reducing signal drop-out in Gradient Echo
imaging using a Hyperbolic Secant pulse was developed
and tested at 7T. The coronal images showed reduced
signal drop-out in the brain-stem, inferior temporal
lobe, and the cerebellum, producing images of superior
visual quality in human subjects.
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