Abstract #2096

3D UTE MR thermometry of frozen tissue: feasibility and accuracy during cryoablation at 3T

Christiaan G. Overduin¹, Jurgen J. Fütterer^1,2, and Tom W.J. Scheenen¹

¹Radiology, Radboud University Medical Centre, Nijmegen, Netherlands, ²MIRA Institute for Biomedical Engineering and Technical Medicine, University of Twente, Enschede, Netherlands

Our study assessed the feasibility and accuracy of 3D ultrashort TE (UTE) MR thermometry to dynamically track temperatures across frozen tissue during cryoablation on a clinical MR system at 3T. We demonstrated 3D UTE imaging to achieve measurable MR signal from frozen tissue down to temperatures as low as -40°C within a clinically realistic time-frame (~1min) and with sufficient spatial resolution (1.63mm isotropic). Using a calibration curve, we could derive 3D MR-estimated temperature maps of the frozen tissue, which showed good agreement with matched temperature sensor readings on statistical analysis.

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