Reflectometry based approaches already cover the cases where the object itself is the source of the radiation. On Sat, Apr 21, 2012 at 4:28 PM, wrote: > > There are two fundamental techniques for imaging ; measure the > > reflected part / measure the absorbed part (reflection/transmission). > > Terahertz imaging uses the third one - measure the radiated part. A human > body radiates quite a lot of energy in the terahertz region, and it is th= is > energy that proposed full body scanners at airports etc are using to dete= ct > people carrying weapons. > > -- > Scanned by iCritical. > > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .