title: Triple photon absorptiometry cannot correct for fat inhomogeneities in lumbar spine bone mineral measurements.
abstract: In vivo fat inhomogeneities can cause significant errors in measurements of lumbar spine mineral mass using dual photon absorptiometry. Extension to a triple photon technique to correct for the presence of fat is not possible because of the unacceptable increase of about a factor of 3,000 required in the radiation dose to yield sufficient transmitted photons for adequate precision.
authors.affiliation: Department of Nuclear Medicine, Chedoke-McMaster Hospitals, Hamilton, Ontario, Canada.
authors.forename: T J
authors.initials: TJ
authors.lastname: Farrell
authors.forename: C E
authors.initials: CE
authors.lastname: Webber
mesh_terms: D015502:Absorptiometry, Photon / Q000379:methods*; D000273:Adipose Tissue / Q000000981:diagnostic imaging*; D015519:Bone Density; D003951:Diagnostic Errors; D006801:Humans; D008159:Lumbar Vertebrae / Q000000981:diagnostic imaging*; D011877:Radionuclide Imaging