calculated bone cross-sectional area measurement 2013-07-08T15:19:03Z A measurement which has been normalized, adjusted or derived by a mathematical process or computation, of the extent of a plane through, that is, perpendicular to the longest axis of a bone, the hard, rigid form of connective tissue constituting most of the skeleton of vertebrates and composed chiefly of calcium salts. CMO:0001682 JSmith clinical_measurement_ontology bone cross-sectional area measurement