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Triple photon absorptiometry cannot correct for fat inhomogeneities in lumbar spine bone mineral measurements
1Department of Nuclear Medicine, Chedoke-McMaster Hospitals, Hamilton, Ontario, Canada.
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.