Pencil-beam vs fan-beam dual-energy X-ray absorptiometry comparisons across four systems: body composition and bone mineral.
作者： Janet-Mae P. Soriano , Elli Ioannidou , Jack Wang , John C. Thornton , Mary N. Horlick
DOI: 10.1385/JCD:7:3:281
关键词:
摘要: We compared bone mineral density (BMD) and body fat percentage (%fat) between two pencil-beam (Lunar DPX DPX-L) fan-beam Prodigy, Hologic Delphi A) dual-energy X-ray absorptiometry (DXA) systems. examined these values in the total-body, spine, femur, forearm scans 78 healthy adults across four DXA BMD %fat were highly correlated among instruments. DPX-L gave lowest mean Prodigy highest for both sexes. The means system dependent estimates machines. There was a significant difference detected manufacturers, with A providing systematically lower than Lunar systems whole body, femur sites but higher forearm. present study results show that are correlated, vary by system. Significant differences exist instruments, especially different most of comparisons sex dependent. conclude longitudinal studies should always be evaluated on same when possible, translation models used to assess cross-instrument differences.
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