Meeting Banner
Abstract #4275

Optimization of the kT-points placement under explicit SAR and power constraints in the large flip angle regime

Vincent Gras1, Michel Luong2, Alexis Amadon1, and Nicolas Boulant1

1Neurospin, CEA/DSV/I2BM, Gif-sur-Yvette, France, 2IRFU, CEA/DSM, Gif-sur-Yvette, France

The kT-points parametrization is a powerful technique to mitigate the RF inhomogeneity at ultra-high field which can also be used to achieve homogeneous non-selective inversion profiles with less SAR than adiabatic RF pulses. The large flip angle regime thus is an interesting domain of application of the kT-points technique. However, to fully exploit it, it is necessary to optimize the placement of the kT-points in k-space. In this work, the simultaneous optimization of the RF and k-space trajectory coefficients is proposed and validated, whereby SAR and power constraints are handled explicitly.

This abstract and the presentation materials are available to members only; a login is required.

Join Here