Subject: Is it possible to detect a living thing via their emission spectra?

I have a lot of curiosity in terms of what if? and in the areas of realistic 
science fiction so I was curious to find out if this is possible? I'm aware of 
the emission/absoprtion spectra that elements create and be identified by and 
wondered if this is possible in any way for individual physical living bodies 
(i.e. not byproducts like gaseous emissions). Could hyperspectral imaging be 
used for such things? Thank youfor your time!!!

Re: Is it possible to detect a living thing via their emission spectra?