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 Bottlaender^3,4, 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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