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A scanner used to measure bone density using dual energy X-ray absorptiometry. Bone density, or bone mineral density, is the amount of bone mineral in bone tissue.The concept is of mass of mineral per volume of bone (relating to density in the physics sense), although clinically it is measured by proxy according to optical density per square centimetre of bone surface upon imaging. [1]
Dual-energy X-ray absorptiometry ( DXA, or DEXA[ 1]) is a means of measuring bone mineral density (BMD) using spectral imaging. Two X-ray beams, with different energy levels, are aimed at the patient's bones. When soft tissue absorption is subtracted out, the bone mineral density (BMD) can be determined from the absorption of each beam by bone.
Osteopenia, known as " low bone mass " or " low bone density ", is a condition in which bone mineral density is low. [ 1] Because their bones are weaker, people with osteopenia may have a higher risk of fractures, and some people may go on to develop osteoporosis. [ 2] In 2010, 43 million older adults in the US had osteopenia. [ 3]
Dr. Sarah Fishman, MD, PhD, an endocrinologist in New York City, agrees that a bone density scan is the best way to know how healthy your bones are. “Unfortunately, osteoporosis and osteopenia ...
Frequency. 15% (50 year olds), 70% (over 80 year olds) [ 7 ] Osteoporosis is a systemic skeletal disorder characterized by low bone mass, micro-architectural deterioration of bone tissue leading to more porous bone, and consequent increase in fracture risk. It is the most common reason for a broken bone among the elderly. [ 3 ]
The trabecular bone score is a textural parameter that can be applied to DEXA, which quantifies the local variations in gray level. TBS is derived from the evaluation of the experimental variogram, obtained from the grayscale DEXA. [citation needed] It was found that TBS is a reflection of the structural condition of the bone microarchitecture.
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