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Investigation of post mortem brain, rectal and forehead temperature relations
Celine Berger1, Melanie Bauer1, Holger Wittig1
1Institute of Forensic Medicine, Department of Biomedical Engineering, University of Basel, Basel, Switzerland; Institute of Forensic Medicine, Health Department Basel-Stadt, Basel, Switzerland.
Journal of Thermal Biology
|June 30, 2023
Summary
Forehead temperature can accurately model brain temperature in post mortem magnetic resonance (MR) imaging. This non-invasive method is crucial for accurate temperature determination in forensic examinations.
Area of Science:
- Forensic Medicine
- Medical Imaging
- Biophysics
Background:
- Magnetic resonance (MR) imaging is temperature-sensitive, impacting post mortem examinations.
- Accurate brain temperature determination is critical for post mortem MR imaging.
- Direct temperature measurement is invasive and inconvenient.
Purpose of the Study:
- To investigate the relationship between brain and forehead temperature for modeling brain temperature.
- To compare brain temperature modeling using forehead versus rectal temperature.
- To establish a non-invasive method for estimating brain temperature in post mortem MR imaging.
Main Methods:
- Continuous measurement of brain temperature (longitudinal fissure), rectal temperature, and forehead temperature in 16 deceased individuals.
- Fitting linear mixed, linear, quadratic, and cubic models to assess temperature relationships.
- Inclusion of sex, environmental temperature, and humidity as fixed effects in the linear mixed model.
Main Results:
- Linear mixed models showed the highest adjusted R² values for both longitudinal fissure-forehead and longitudinal fissure-rectal temperature relationships.
- Forehead temperature demonstrated a comparable ability to model longitudinal fissure brain temperature as rectal temperature.
- Environmental factors like sex, temperature, and humidity influenced the temperature models.
Conclusions:
- Both forehead and rectal temperatures can effectively model brain temperature measured in the longitudinal fissure.
- Forehead temperature offers a non-invasive alternative for modeling brain temperature, overcoming measurement challenges.
- The findings support the use of forehead temperature for modeling brain temperature in post mortem MR imaging.
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