Farrell T J, Webber C E
Department of Nuclear Medicine, Chedoke-McMaster Hospitals, Hamilton, Ontario, Canada.
Clin Phys Physiol Meas. 1990 Feb;11(1):77-84. doi: 10.1088/0143-0815/11/1/007.
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.
体内脂肪不均匀性会导致使用双能光子吸收法测量腰椎矿物质含量时出现显著误差。由于辐射剂量需要增加约3000倍才能产生足够的透射光子以获得足够的精度，这是不可接受的，因此无法扩展到三能光子技术来校正脂肪的存在。
