The main objective of this study is to validate the measurement characteristics of a new bone densitometer, the Stratos DR: * Via cross calibration to the results of body composition (BC) measurement results to those of a reference device (the "Discover A" by Hologic) in terms of body fat percentage, lean mass percentage of total body mass and for different subregions (left and right arms, left and right sides, lumbar and thoracic spine, pelvis, left and right legs, head, android area, gynecoid area, visceral region). * And by the evaluation of the reproducibility of the BC measurement results in terms of fat mass and lean mass.
The secondary objective of this study is to cross calibrate the measures of bone mineral content (BMC) and bone mineral density (BMD) from the Stratos DR against those of the Discovery A on the whole body and its subregions.
Study Type
INTERVENTIONAL
Allocation
NON_RANDOMIZED
Purpose
DIAGNOSTIC
Masking
NONE
Enrollment
50
Whole body exam using the "Discovery A" machine made by Hologic.
First whole body exam using the "Stratos DR" machine made by the DMS group.
Second whole body exam using the "Stratos DR" machine made by the DMS group. This second exam is required for reproducibility purposes.
CHRU de Nîmes - Hôpital Universitaire Carémeau
Nîmes, France
Lin concordance coefficient for fat mass
The cross calibration between the two devices (Stratos vs Discovery) in terms of fat mass and lean mass is estimated by the appreciation of the Lin concordance coefficient.
Time frame: Day 0
Lin concordance coefficient for lean mass
The cross calibration between the two devices (Stratos vs Discovery) in terms of fat mass and lean mass is estimated by the appreciation of the Lin concordance coefficient.
Time frame: Day 0
RMS-%CV (root-mean-square coefficient of variation) for total fat mass
Reproducibility will be evaluated in terms of RMS-% CV for calculating the value of the least significant change (LSC). The values of RMS-%CV (root-mean-square coefficient of variation) of the total fat mass and total lean mass will be compared with the limit values recommended by the ISCD. (International Society for Clinical Densitometry)
Time frame: Day 0
RMS-%CV (root-mean-square coefficient of variation) for total lean mass
Reproducibility will be evaluated in terms of RMS-% CV for calculating the value of the least significant change (LSC). The values of RMS-%CV (root-mean-square coefficient of variation) of the total fat mass and total lean mass will be compared with the limit values recommended by the ISCD. (International Society for Clinical Densitometry)
Time frame: Day 0
Lin's concordance coefficient for Bone Mineral Content
The cross calibration between the two devices (Stratos vs Discovery) in terms of Bone Mineral Content and Bone Mineral Density will be estimated by the study of Lin's concordance coefficient.
Time frame: Day 0
Lin's concordance coefficient for Bone Mineral Density
The cross calibration between the two devices (Stratos vs Discovery) in terms of Bone Mineral Content and Bone Mineral Density will be estimated by the study of Lin's concordance coefficient.
Time frame: Day 0
This platform is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional.