DEXA for Determining Bone Mineral Density
DEXA Bone Density or Dual energy X-ray absorptiometry is the latest and most accurate means of measuring bone mineral density. DEXA is most commonly used to diagnose osteoporosis. It is also used for determining body composition including bone density, lean body mass, the distribution of fat and lean tissue in the arms, trunk, and legs, body fat percentage and fat mass. Dual energy X-ray absorptiometry scan is used to diagnose osteoporosis. This technology provides valuable information to the athletes who need a defined body structure according to the sports they are involved in.
DEXA is considered to be the most widely used bone density measurement technology. The amount of radiation that is used is extremely low. In this bone density measurement technology, two x-ray beams with differing energy levels are passed through the patient’s bones to measure the amount of x-ray absorbed by the tissue. One of the two beams is of high intensity while the other is of low intensity. Depending upon the absorption of each beam one can determine the bone mineral density. Of the two energy peaks, one is absorbed by the soft tissue while the other by bone. The soft tissue amount is deducted to calculate the patient’s bone mineral density.
DEXA Bone Density/ Dual energy X-ray absorptiometry is based on three compartmental models covering total body mineral from bones, fat-free soft (lean) mass and fat tissue mass. This method is precise and accurate. However, the equipment used for the measurement is expensive and requires a trained radiologist to operate.