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The U.S. Preventive Services Task Force recommends that women over the age of 65 should get a DXA scan. [3] The age when men should be tested is uncertain, [3] but some sources recommend age 70. [4] At risk women should consider getting a scan when their risk is equal to that of a normal 65-year-old woman.
Aspirin in men 45 to 79 and women 55 to 79 for cardiovascular disease; Colon cancer screening by colonoscopy, occult blood testing, or sigmoidoscopy in adults 45 to 75. [11] Low-dose CT scans for adults 55 to 80 at increased risk of lung cancer; Osteoporosis screening via bone dual-energy X-ray absorptiometry (DEXA) in women over 65
A DEXA scan (dual-energy X-ray absorptiometry) is the “gold standard” for calculating body composition because it’s low cost, low radiation, and very accurate, Dr. Busse says.
DXA scans assume a constant relationship between the amounts of lean soft tissue and adipose tissue. This assumption leads to measurement errors, with an impact on accuracy as well as precision. To reduce soft-tissue errors in DXA, DXL technology was developed in the late 1990s by a team of Swedish researchers led by Prof. Ragnar Kullenberg.
Dual energy X-ray absorptiometry, or DXA (formerly DEXA), is a newer method for estimating body fat percentage, and determining body composition and bone mineral density. X-rays of two different energies are used to scan the body, one of which is absorbed more strongly by fat than the other.
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]
A DXA scanner in use. The National Osteoporosis Foundation recommends use of central (hip and spine) DXA testing for accurate measure of bone density, emphasizing that peripheral or "screening" scanners should not be used to make clinically meaningful diagnoses and that peripheral and central DXA scans cannot be compared to each other. [22]
Radiofrequency Echographic Multi Spectrometry (REMS) is a non-ionizing technology for osteoporosis diagnosis and for fracture risk assessment. REMS processes the raw, unfiltered ultrasound signals acquired during an echographic scan of the axial sites, femur and spine. The analysis is performed in the frequency domain.