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Abstract #3948

Reducing inter-subject variability and improving accuracy of Universal Pulses using standardized (universal) pulses

Caroline Le Ster1, Franck Mauconduit1, Aurélien Massire2, Vincent Gras1, and Nicolas Boulant1
1Paris-Saclay University, CEA, CNRS, BAOBAB, NeuroSpin, Gif-sur-Yvette, France, 2Siemens Healthcare SAS, Saint-Denis, France

Parallel transmission allows flip angle homogenization at ultra-high field. The pulse design process can be made transparent to the user with calibration-free universal pulses (UP) that are designed over a database of field maps. Here a new method is proposed where UPs are designed over a standardized database, i.e. normalized to a reference. During a scan, these standardized UPs (SUPs) are adjusted to the subject through a fast calibration that relies on a linear transformation of the actual B1+ map to the database reference. Adjusted SUPs improve excitation performance and reduce intersubject variability compared to UPs.

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