Dereu & Sons Mfg. Co.

Radiopacity of coins

The images below were taken of solid coins side by side with Hollow Spy-Coins.  Each of the Spy-Coins (Micro Half, Micro Euro, and Micro Nickel) were fitted with the Micro SD Memory Card.  As seen from the scans, the US half dollar coin was the most radiolucent of the three, followed by the US nickel, bottom.  The .50 Euro coin, center, is the most opaque, being the thicker coin of the three.

Solid US Half Dollar			Micro-Half
Solid .50 Euro			Micro-Euro
Solid US Nickel			Micro-Nickel

Images taken with 55 KVP at 10 MaS.  The solid nickel is just showing a bit of transparency at this setting.