RICHARD A. KRUMHOLZ, M.D.
To the editor: The American College of Physicians Position Paper (1) on radiologic methods to evaluate bone mineral content, does not give a balanced picture of the state of the art of bone mineral measurement from roentgenograms of the skeleton. The paper fails to distinguish between two different versions of measuring bone mineral mass from roentgenographic images of the phalanges. Photodensitometry is the name given to both methods. The older, inferior aluminum equivalency method (2-4) compares the optical density of the bone image with the optical density produced by an aluminum reference wedge. The mass of the flesh-covered
KRUMHOLZ RA. Radiologic Methods for Estimation of Mineral Content of Bone. Ann Intern Med. ;101:878–879. doi: 10.7326/0003-4819-101-6-878_2
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Published: Ann Intern Med. 1984;101(6):878-879.
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