Abstract #2172

Finding the optimal temperature calibration for postmortem MRS thermometry in forensic medicine

Niklaus Zoelch^1,2, Jakob Heimer¹, Henning Richter³, Michael J. Thali¹, and Dominic Gascho¹

¹Institute of Forensic Medicine, University of Zurich, Zurich, Switzerland, ²Zurich University Hospital of Psychiatry, University of Zurich, Zurich, Switzerland, ³Clinic of Diagnostic Imaging, Vetsuisse Faculty, University of Zurich, Zurich, Switzerland

Synopsis

MRI and MRS are finding more and more their way into forensic medicine. Unlike in vivo measurements, however, the temperature of cadavers in forensic medicine varies considerably and affects the performed measurement. The present study investigated how well published calibrations measured in vivo or in phantoms are suited for postmortem MRS thermometry. Postmortem MRS thermometry would allow to estimate and possibly correct the effects of the local temperature in a forensic setting. The study reveals that despite strong postmortem changes, a reliable estimation of the local temperature over up to 60 hours after death is possible with available temperature calibrations.

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