Siemens Healthineers Ag

Max-planck-gesellschaft Zur F&#xf6;rderung Der Wissenschaften E. V.

Eberhard Karls Universitat Tubingen Medizinische F Akultat

Ali Aghaeifar

Radhouene Neji

Klaus Scheffler

Raphael Tomi-Tricot

Iulius Dragonu

Jonas Bause

Alexander Loktyushin

Belinda Ding Yuan

Martin Eschelbach

A method for optimization of an RF pulse that is multi-band. The RF pulse is a spokes RF pulse including a train of sub-pulses. The method includes using a starting k-space position as a current k-space position, and for each of slices to be excited by the RF pulse, performing: calculating a sub-pulse based on the current k-space position and calculating an expected magnetization after that sub-pulse; calculating an inverse Fourier transform of a difference between an expected magnetization and a target magnetization; and determining an optimal k-space position for a next spoke for this slice to be at a position where an absolute value of the inverse Fourier transform has a maximum. A next k-space position is determined for all slices together based on the optimal k-space positions determined for each slice individually. A multi-band RF pulse is determined based on the determined k-space positions.

Method for subject-specific optimization of a multi-band RF pulse

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Tübingen, Germany

Ali Aghaeifar