Ghostbusters?
The people I usually associate with that sort of thing are members of the Spiritualist Church rather than electronics engineers:
http://www.fst.org/mediumship.htm
Sounds to me a bit like trying to photograph ghosts using infra-red film. After all, ghosts are not warm blooded mammals, so why should you expect them to have an infra-red profile?...........assuming that you believe in them.
Anyway, why restrict yourself.........what about Angels, Saints, Jinn, Devils, Extra-terrestrials (SETI?)
This may be of interest:
http://www.thejinn.net/
:)
