title: Femur BMD bias associated with DPX-IQ reanalysis of DPX-acquired scan files.
abstract: Bone mineral density values calculated by DPX-IQ software reanalysis of original DPX software analyzed scans were compared at the femur region. Based on the results for 24 subjects each scanned on 12 different occasions, a significant bias at all sites--neck, Ward's triangle and trochanter--ranging from -0.7% (neck) to -2.1% (trochanter) was found. For the trochanter site 16 of the 24 subjects had significantly lower mean BMD values after DPX-IQ reanalysis, a trend also noted at the neck and Ward's triangle. Although it has been recommended that scans analyzed with DPX software do not require DPX-IQ reanalysis, our findings strongly indicate that DPX-IQ reanalysis is essential to minimize total error during follow-up BMD determinations.
authors.affiliation: Queen Elizabeth Hospital, Woodville, South Australia. gphillipov@tqehsmtp.tqeh.sa.gov.au
authors.forename: G
authors.initials: G
authors.lastname: Phillipov
authors.forename: C J
authors.initials: CJ
authors.lastname: Seaborn
mesh_terms: D015502:Absorptiometry, Photon / Q000592:standards*; D000368:Aged; D000369:Aged, 80 and over; D015982:Bias; D015519:Bone Density; D003936:Diagnosis, Computer-Assisted; D005260:Female; D005269:Femur / Q000502:physiology*; D006801:Humans; D008297:Male; D012984:Software