A METHOD FOR SUBJECT-SPECIFIC OPTIMISATION OF AN RF PULSE FOR EXCITING THE SPINS IN A SLAB

The invention is directed to a method for optimisation of an RF pulse for exciting spins in a slab in a magnetic resonance examination, wherein the RF pulse is to be played out with a coil (4) having a plurality of independent parallel transmit elements (6), the method comprising the steps of (a) re...

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Bibliographic Details
Main Authors Aghaeifar, Ali, Tomi-Tricot, Raphael, Neji, Radhouene, Ding Yuan, Belinda, Dragonu, Iulius
Format Patent
LanguageEnglish
French
German
Published 13.03.2024
Subjects
MEASURING
MEASURING ELECTRIC VARIABLES
MEASURING MAGNETIC VARIABLES
PHYSICS
TESTING
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Summary:The invention is directed to a method for optimisation of an RF pulse for exciting spins in a slab in a magnetic resonance examination, wherein the RF pulse is to be played out with a coil (4) having a plurality of independent parallel transmit elements (6), the method comprising the steps of (a) receiving complex B1+ field sensitivity maps (7) for the plurality of parallel transmit elements (6); (b) dividing the slab into at least two sub-slabs (10a, 10b, 10c, 14a, 14b, 14c); (c) for each sub-slab, performing B1+ shimming to optimize the RF shim settings for the plurality of parallel transmit elements (6); (d) combining the optimized RF shim settings for each sub-slab to create a multiband RF pulse (22, 24) which simultaneously excites the spins in the complete slab. The invention is also directed to a method for acquiring magnetic resonance data, a computer program, a non-transient computer-readable medium (65), a control unit (64) and a magnetic resonance imaging system (60).
Bibliography:Application Number: EP20220194853