GE Lunar iDEXA

iDEXA

Anthropometry objective

Whole body DEXA scan

29th October 2021

Richard Powell, MRC Epidemiology Unit

The Lunar iDEXA is a GE healthcare DEXA system which can be used for whole body scans and has been designed to accommodate larger individuals than the GE Lunar Prodigy. GE healthcare DEXA systems uses a K-edge filter that absorbs the X-rays in the middle energy range creating two low energy X-rays and classes the Lunar iDEXA as a narrow-angle fan beam. It measures the attenuation of the two X-rays as they pass through body tissues. Different tissues absorb these x rays in different manners and it therefore distinguishes bone mass from soft tissue and within the soft tissue fat mass and lean mass. The manufactures enCORE software provides estimates of bone mineral content, fat and lean mass for the total body and specifically defined regions. The enCORE corescan software feature can produce estimates of visceral adipose tissue (mass and volume) within the android region. The measurement field is 197.5 cm x 66 cm for whole body scans with a maximum patient weight 204kg and a exposure of 3 to 6 µGy.