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Abstract #1888

Minimum-Time VERSE Pulse Correction for Slice Selectivity Improvement in 2D-UTE Imaging

Lucas Soustelle1, Paulo Loureiro de Sousa1, Sascha Koehler2, Chrystelle Po1, François Rousseau3, and Jean-Paul Armspach1

1Université de Strasbourg, CNRS, ICube, FMTS, Strasbourg, France, 2Bruker BioSpin MRI, Ettlingen, Germany, 3Institut Mines Télécom, Télécome Bretagne, INSERM LaTIM, Brest, France

The Variable-rate Selective Excitation (VERSE) approach allows to achieve very short echo time in 2D-UTE sequences when applied on a selective half-pulse and its paired slice selection gradient. Unfortunately, the latter may suffer from non-linearities and eddy current effects, all the more important on preclinical scanners equipped with strong gradient systems.
An efficient method was implemented on a 7T preclinical scanner to measure the real slice selection gradient profile. A reshaping of the corresponding pulse was made, improving the slice selectivity.

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