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A bone density test may detect osteoporosis or osteopenia. [4] The usual response to either of these indications is consultation with a physician. [4] Bone density tests are not recommended for people without risk factors for weak bones, [5] [4] which is more likely to result in unnecessary treatment rather than discovery of a weakness.
The standard in bone mineral density scanning developed in the 1980s is called Dual X-ray Absorptiometry, known as DXA. The DXA technique uses two different x-ray energy levels to estimate bone density. DXA scans assume a constant relationship between the amounts of lean soft tissue and adipose tissue.
Bone densities are often given to patients as a T score or a Z score. A T score tells the patient what their bone mineral density is in comparison to a young adult of the same gender with peak bone mineral density. A normal T score is -1.0 and above, low bone density is between -1.0 and -2.5, and osteoporosis is -2.5 and lower.
Osteopenia is reduced bone density caused by the loss of minerals within bones. Osteoporosis is a more severe loss of bone mineral density that puts patients at risk for fractures. DepositPhotos.com
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Quantitative computed tomography (QCT) is a medical technique that measures bone mineral density (BMD) using a standard X-ray computed tomography (CT) scanner with a calibration standard to convert Hounsfield units (HU) of the CT image to bone mineral density values. [1] Quantitative CT scans are primarily used to evaluate bone mineral density ...
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. Bone mineral density is estimated by comparing the results against reference models. The accuracy has been tested by comparing it against to DXA technology. [1] [2] [3] [4]
The bone mineral density was calculated by visually comparing the bone mineral density and the known density at each step of the phantom. The next improvement in the field of bone mineral density is the single-photon absorption (SPA) method invented by Cameron and Sorenson in 1963. [7]
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