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Encore version 13

Manufactured by GE Healthcare

The EnCORE Version 13 is a dual-energy X-ray absorptiometry (DXA) system designed for bone density and body composition analysis. It provides precise measurements of bone mineral density, lean body mass, and fat mass.

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2 protocols using encore version 13

1

Anthropometric Measurements and Bone Density Assessment

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Standing height, waist and hip girth, and weight were measured with the participant lightly-clothed and shoeless using standard anthropometric techniques. Body mass index (BMI) was calculated as well as waist to hip ratio (WHR). Blood pressure was determined to the nearest 2 mmHg using a mercury sphygmomanometer with a cuff of appropriate size. Two readings of systolic blood pressure (SBP) and diastolic blood pressure (DBP) were taken at a five-minute interval, and the mean of the two readings was taken as the BP value. Arterial hypertension was defined based on the following information alone or in combination: (1) with a history of arterial hypertension; (2) using antihypertensive medication; or (3) a systolic blood pressure >140 mmHg, or a diastolic blood pressure of >90 mmHg.
Dual energy X-ray absorptiometry (DEXA) scans (AP spine and dual femur) were undertaken to assess bone mineral density (BMD) using a GE Lunar Prodigy Pro densitometer and enCORE Version 13 (GE Health) software. Bone mineral density was measured in grams per centimeter squared (g/cm2) and young adult T-scores and age-matched z-scores were derived using the combined Geelong/Lunar reference database (GE Health).
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2

Detailed DXA Scanning Protocol for Body Composition

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DXA scans were undertaken to assess BMD of total hip, femoral neck, anterior-posterior spine (L1-L4) and whole body using a GE Lunar Prodigy Pro densitometer (Madison, WI, USA). The scans were analysed using enCORE Version 13 (GE Health) software with manual inspection of regions of interest and adjustment where necessary by two independent reviewers (MH and KZ). Body composition estimates including whole body fat mass (g) and lean mass (bone free) (g) were also obtained from the whole body DXA scan. Fat mass index (FMI) was calculated as fat mass (kg) / height (m 2 ) and lean mass index (LMI) was calculated as lean mass (kg) / height (m 2 ). Percentage body fat mass was calculated as (fat mass/total mass) ×100. Annual servicing and calibration according to manufacturer's specifications were carried out and calibration of the DXA machine using a phantom was performed prior to each scanning session. The precision error was <2.0% for each measured site at standard speed based on repeated scans in a random sample of 30 subjects. Using FMI reference ranges developed from NHANES, participants were classified into categories of fat deficit, normal, excess fat, obese I and obese II-III using FMI cut-offs of <3, 3-6, 6-9, 9-12 and >12 for males and <5, 5-9, 9-13, 13-17 and >17 for females [16] .
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