Qdr 4500a dxa machine

Manufactured by Hologic

Sourced in United States

The QDR 4500A DXA machine is a dual-energy X-ray absorptiometry (DXA) device used for bone mineral density (BMD) measurements. It is designed to assess bone health and detect conditions such as osteoporosis. The QDR 4500A DXA machine provides accurate and reliable measurements of BMD in the spine, hip, and other skeletal regions.

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Lab products found in correlation

Apex 3, by Hologic (2 mentions) Apex software version 4, by Hologic (2 mentions)

2 protocols using qdr 4500a dxa machine

Whole-Body Composition Measurement by DXA

Cited 1 time

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Whole body composition was measured at year 22 using a Hologic QDR 4500A DXA machine and analysed using Apex software version 4.0.2 (Hologic Inc., Bedford, USA). All scans were performed according to standard procedures by a trained technician. The machine was calibrated daily using a phantom spine, and coefficients of variation during the course of the study were <2% for total fat mass, and 1% for fat-free soft tissue mass. All standard DXA measurements were analysed using Hologic APEX 3.1 software (Hologic). Whole body (excluding head) fat free soft tissue mass (FFSTM) and fat mass were recorded. Abdominal visceral adipose tissue (VAT) and subcutaneous adipose tissue (SAT) were measured according to previously described methodology [22 (link)].

Prioreschi A., Munthali R.J., Kagura J., Said-Mohamed R., De Lucia Rolfe E., Micklesfield L.K, & Norris S.A. (2018). The associations between adult body composition and abdominal adiposity outcomes, and relative weight gain and linear growth from birth to age 22 in the Birth to Twenty Plus cohort, South Africa. PLoS ONE, 13(1), e0190483.

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Whole-body Composition Analysis via DXA

Cited 1 time

Check if the same lab product or an alternative is used in the 5 most similar protocols

Whole-body composition was measured using a Hologic QDR 4500A DXA machine and analysed using Apex software version 4.0.2 (Hologic Inc., Bedford, USA). The machine was calibrated daily using a phantom spine, and coefficients of variation during the course of the study were <2% for total fat mass. All standard DXA measurements were analysed using Hologic APEX 3.1 software (Hologic). The APEX software defines gluteofemoral fat (gynoid fat) as lying in a region from the head of the femur to the mid-thigh, while leg fat was measured in a region demarcated by an oblique line passing through the femoral neck and joining a central vertical line between the legs (see Supplementary Fig. 1, see section on supplementary materials given at the end of this article). Whole-body (excluding head) fat mass was recorded. Abdominal visceral adipose tissue and s.c. adipose tissue were measured according to previously described methodology (17 (link)).

Gradidge P.J., Jaff N.G., Norris S.A., Toman M, & Crowther N.J. (2022). The negative association of lower body fat mass with cardiometabolic disease risk factors is partially mediated by adiponectin. Endocrine Connections, 11(12), e220156.

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