Densitometry of photographic images.
D000818:Animals; D001345:Autoradiography; D001842:Bone and Bones / Q000378:metabolism*; D002127:Calcium Isotopes / Q000378:metabolism*; D002648:Child; D003720:Densitometry; D004285:Dogs; D006801:Humans; D066298:In Vitro Techniques; D008852:Microradiography; D008903:Minerals / Q000378:metabolism*; D013053:Spectrophotometry
D002127:Calcium Isotopes; D008903:Minerals