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https://doi.org/10.6009/jjrt.kj00003325302
Copy DOIPublication Date: Jan 1, 1993 | |
Citations: 2 | License type: partially-free |
The effect of radiographic exposure factors such as the photographic film density, X-ray tube voltage, and focus-film distance on the indices of bone mineral obtained by computed X-ray densitometry (CXD), a newly developed X-ray microdensitometric system, was investigated. sigma GS/D, which corresponded to the bone mineral density divided the integrated bone mineral by the bone width of the second metacarpal bone, was influenced by these exposure factors, whereas MCI, which represented the ratio of the cortical bone to whole bone, was independent of them. Present results indicated that the focus-film distance between 85 and 115 cm, the X-ray tube voltage in 45-60 kV, and a photographic density of lower than 1.82-1.86 of the screen-film combination should be used to assess quantitatively bone mineral of the second metacarpal bone using the CXD system.
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