title: Dichromatic absorptiometry of vertebral bone mineral content.
abstract: A dichromatic photon absorptiometric technique for the in vivo measurement of the bone mineral of the spine is discussed. A high purity, high activity 153Gd source which has photons of predominantly 44 and 100 keV was used as the transmission source. The transmission scans were performed on a modified Ohio Nuclear whole body rectillinear scanner. The precision of four measurements on three individuals and three measurements on one individual over a one month period was 2.3% (coefficient of variation). The accuracy determined by measurements of phantoms with known concentrations of dipotassium hydrogen phosphate solutions was 1.2% (standard error of estimate). This technique can be applied in most well equipped nuclear medicine departments.
mesh_terms: D000042:Absorption; D002118:Calcium / Q000032:analysis*; D004601:Elementary Particles; D005682:Gadolinium; D006801:Humans; D008159:Lumbar Vertebrae / Q000032:analysis; D008722:Methods; D011868:Radioisotopes; D013131:Spine / Q000032:analysis*
chemical_list: D011868:Radioisotopes; D005682:Gadolinium; D002118:Calcium