Composite Localization with Adiabatic Slice Selective Excitation & Refocusing (CLASER) for Improved 1H MRSI in Non Uniform B1 Fields

Catalina Sofia Arteaga De Castro^1,2, Uulke A. van Der Heide¹, Marco van Vulpen¹, Peter R. Luijten², Dennis W. J. Klomp²

Due to strong B1 field non uniformities at higher fields, measurements like MR spectroscopy can be difficult to obtain with a good localization. We have included a composite slice selective adiabatic excitation in a sLASER sequence (cLASER) to reduce SAR deposition and the TE while preserving total adiabaticity of the sequence. In-vivo results are shown in the human prostate to illustrate the cLASER performance.