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Abstract #1255

Radiofrequency heating measurement using MR thermometry and field monitoring: methodological considerations and first in vivo results.

Caroline Le Ster1, Franck Mauconduit1, Christian Mirkes2, Michel Bottlaender3,4, Fawzi Boumezbeur1, Boucif Djemai1, Alexandre Vignaud1, and Nicolas Boulant1
1Paris-Saclay University, CEA, CNRS, BAOBAB, Neurospin, Gif-sur-Yvette, France, 2Skope MRT, Zurich, Switzerland, 3Paris-Saclay University, CEA, CNRS, INSERM, BioMaps, Service hospitalier Joliot, Orsay, France, 4UNIACT, Neurospin, CEA, Gif-sur-Yvette, France

An MR thermometry (MRT) method with field monitoring is proposed to improve the measurement of small temperature variations occurring in head MRI exams. MRT experiments were performed at 7T with concurrent radiofrequency heating and field monitoring on an agar-gel phantom and on an anaesthetized macaque. Inclusion of field fluctuations in image reconstruction showed beneficial for the measurement of small temperature rises as encountered in standard brain exams.

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