Meeting Banner
Abstract #3952

Time optimal control based design of robust inversion pulses

Christina Graf1, Martin Soellradl1, Armin Rund2, Christoph Stefan Aigner3, and Rudolf Stollberger1
1Graz University of Technology, Institute of Medical Engineering, Graz, Austria, 2Institute of Mathematics and Scientific Computing, University of Graz, Graz, Austria, 3Physikalisch-Technische Bundesanstalt (PTB), Braunschweig and Berlin, Berlin, Germany

The aim of this work is to design short and B0- and B1-robust inversion pulses by optimal control. A time-optimal control framework is used that incorporates variations within B0- and B1-fields. The optimized RF pulse is compared numerically to two hyperbolic-secant pulses and shows a very good efficiency over a broad set of B0-offsets and B1-scalings. Two phantom measurements are performed on a 3T MRI system for various scalings of B1 that verify the results, one with a cylindrical MRI phantom, the other one with oil and water with a contrast agent, demonstrating also the B0-robustness of the proposed pulse.

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

Join Here