title: The effects of local versus average baseline determination on spinal density.
abstract: We compared two approaches for determining soft tissue baseline with dual energy X-ray absorptiometry (DEXA) of the spine. An average baseline for the entire L2-L4 region resulted in overestimation of the L2 density by 2% and underestimation of L4 density by 2% in 122 subjects. The results for the L2-L4 region, and for L3, were comparable with both approaches and the precision error in vivo also was comparable (0.8%).
authors.affiliation: Lunar Radiation Corporation, Madison, WI 53713.
authors.forename: R B
authors.initials: RB
authors.lastname: Mazess
authors.forename: C
authors.initials: C
authors.lastname: Gifford
authors.forename: J
authors.initials: J
authors.lastname: Bisek
authors.forename: P
authors.initials: P
authors.lastname: Markwardt
mesh_terms: D015502:Absorptiometry, Photon / Q000379:methods* / Q000706:statistics & numerical data; D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D015519:Bone Density; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012016:Reference Values