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Abstract #3677

Spline-Based Temperature Probe Registration for MRThermometry Validation in Head and Neck Hyperthermia Phantoms

Matthew Tarasek 1 , Ruben Pellicer 2 , Lorne Hofstetter 1 , Jurriaan Bakker 2 , Wouter Numan 2 , Gyula Kotek 2 , Eric Fiveland 1 , Gavin Houston 3 , Gerard van Rhoon 2 , Maarten Paulides 2 , and Desmond Yeo 1

1 MRI, GE global research, Niskayuna, NY, United States, 2 Erasmus Medical Center, Netherlands, 3 MRI, GE healthcare, Netherlands

MR thermometry (MRT) validation can be difficult in head and neck (H&N) hyperthermia treatments due to the nonlinear trajectory of H&N temperature (T) probe catheters. In this work, we utilize a previously developed spline-fitting technique to reconstruct the catheters in MR image coordinate space and present (i) an effective approach for T probe sensor localization in phantoms to mitigate T probe localization errors and (ii) provide a means of more accurate proton resonance frequency thermal coefficient characterization, which corrects for systematic over- or underestimation of temperature with MRT. Findings show that this method is beneficial for MRT validation.

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