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Bone densitometry can be performed from either non-i.v. or i.v. contrast clinical CT scans if a conversion factor is applied. This can be determined by utilizing a formula Daverage = -7.83 + (0.99 x NCaverage), where Daverage and NCaverage are the abbreviations of "dedicated" and "noncontrast clinical" BMD averaged over vertebral bodies L1-L3, respectively.
Hopper et al. (Wed,) studied this question.
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