Radiodensity of the proposed new penny.
In 1973 the United States Mint proposed replacing the bronze penny with a less expensive penny made of aluminum. Pediatricians and pediatric radiologists, by testifying that aluminum coins are difficult to see on radiographs, helped defeat that legislation. Now the Mint again proposes a less expensive penny, one made principally of zinc. This proposed penny is radiopaque and will be easily identified on radiographs.
D000535:Aluminum; D004064:Digestive System / Q000000981:diagnostic imaging; D005547:Foreign Bodies / Q000000981:diagnostic imaging*; D006801:Humans; D011859:Radiography; D012137:Respiratory System / Q000000981:diagnostic imaging; D015032:Zinc
D000535:Aluminum; D015032:Zinc