Daniel Gensler1, Florian Fidler1,
Marcus Warmuth2, Theresa Reiter2, Peter Nordbeck2,
Oliver Ritter2, Mark E. Ladd3, Harald H. Quick4,
Peter M. Jakob1, Wolfgang R. Bauer2
1Forschungszentrum
Magnet-Resonanz-Bavaria e.V., Wuerzburg, Bavaria, Germany; 2Medizinische
Klinik & Poliklinik I, Universittsklinikum Wrzburg, Wuerzburg, Bavaria,
Germany; 3Erwin L. Hahn Institut fr Magnetresonanz, Universitt
Duisburg-Essen; 4Institut fr Medizinische Physik,
Friedrich-Alexander-Universitt Erlangen-Nrnberg
The number of MRI examinations in patients with medical implants is highly increasing, raising several safety issues. Major intention of the current work is to develop a fast T1-based method, which allows controlled heating of an implant while simultaneously quantifying the spatial temperature distribution during MRI. For this purpose an inversion recovery sequence was implemented where the heating is caused by additional RF pulses. The presented T1-based thermometry method allows spatial and temporal quantification of dynamic RF-induced heating near a conducting medical implant. Hence it is possible to precisely analyze the spatial temperature distribution of an implant using a single measurement even in inhomogeneous surroundings.
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