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Aortic coarctation is a potentially life-threatening disease in newborns that requires early treatment. Recently, a new stent was developed for this purpose, which can be redilatated and thus adapted to the growth of the infant’s aorta. Due to the lack of ionizing radiation MPI is a very promising imaging technique for this clinically very important application in children. Therefore, the safety of this stent with regard to heating by oscillating magnetic fields must be investigated before the stent can be used.