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Fig. 1. Cloacal body temperature predicted by thermographic measurements of scalp
temperature. (A) Cloacal temperature vs raw thermographic values. The
effect of absorption and emission in the 80° lens attachment are evident.
(B) Cloacal temperature thermographic temperature corrected for lens effects.
True radiometric scalp temperature averages about 1°C lower than cloacal
temperature. (C) Measured cloacal temperature vs cloacal temperature
predicted by a regression to the data in Fig. 1B. In all cases, data points
are from a single image, and overall precision can be improved by calculating
the mean of data from several images.