The microanalyzer.
D000818:Animals; D001345:Autoradiography; D001842:Bone and Bones / Q000502:physiology*; D003626:Data Display; D003720:Densitometry; D004285:Dogs; D006801:Humans; D008852:Microradiography / Q000295:instrumentation*; D011883:Radium
D011883:Radium