Originally posted by waveguide3
Metallic fillings (amalgam, gold, etc) show up black on xrays. Non-metallic things made from resin, ceramic, synthetic tooth medium, will show paler
and similar to teeth but without internal structure (i.e solid white blobs). Dental caries and other infections can be seen as white/transparent
areas.
Nothing sounds particularly unusual here.
The brain implants are intriguing tho.
WG3
That is not true,
For starters, the actual exposed and develped film is called a radiograph. X-rays are the things that help form the image on the film before it is
developed.
X-rays passing through gums and teeth will affect the crystals on the radiographic film in different ways due to the difference in density.
The more dense the material, the lighter it's image will show up on a radiograph, subsequently the less dense tissue will show up darker.
The reason for this is that more of the x-rays are blocked from passing through a dense material therefore there are less of them to affect the film.
Hope this makes sense.
This amount of darkness is called "radiographic density" and the difference in densities is called "contrast."
PEACE,
RK
[edit on 22-7-2009 by Rigel Kent]