Microwave imagging

Hi
can any body help me in this topic
(food contamination detection) by using microwave imagging
with my regards

I can provide only some reference from the Wiley food Encyclopedia:

P.H.Heinemann et al.,"Machine Vision Inspection of Golden Delicious Apples,"Applied Engineering in Agriculture 11, 901-906 (1995).

M.J.Delwiche,S.Tang,and J.F.Thompson,Prune Defect Detection by Line-scan Imaging,Paper 88-3024,American Society of Agricultural Engineering,St.Joseph,Mich.,1988.

B.K.Miller and M.J.Delwiche,A Color Vision System for Peach Grading,Paper 88-6025,American Society of Agricultural Engineering,place of publication 1988.

Thanks
where i can find these references