Essay Bone Density Scan

Essay Bone Density Scan

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Bone Density Scan
Introduction
Bone density generally refers to the strength of a bone and its ability to bear weight. Doing a bone density scan therefore measures a bone’s strength, its ability to bear weight, and its risk of fracture. The most common and accurate way to measure bone density is to use a Dual-Energy X-ray Absorptiometry (DEXA) scan. (Medlineplus, 2014). Before the use of DEXA was introduced, osteoporosis could be determined only when a patient broke a bone, and by then, the bone may have become very weak. With a bone density scan however, it can be determined if a patient is at risk of bone fracture, or at risk of osteoporosis. The bone density scan is done with Dual Energy X-ray Absorptiometry (DEXA) equipment. The DEXA technology became available for clinical use in 1987, but before then, there were the Single Photon Absorptiometry (SPA), and Dual Photon Absorptiometry (DPA), both of which are no longer in use. (Dasher, Newton, & Lenchik, 2010). The bone density scan is usually done on the following patients:

• Post menopausal women not taking estrogen.
• Patients with personal or maternal history of hip fracture or smoking.
• Post menopausal women who are tall (over 5ft 7inches), or thin (less than 125lbs).
• Men with clinical conditions associated with bone loss.
(Radiologyinfo.org, 2013).
The DXA Scanner
Driver, (2013), described the DEXA scanner as a machine that produces two x-ray beams of high and low energy levels. Much like fluoroscopy, the x-ray from the DEXA scanner comes from underneath the patient, and the scanner has a very low x-ray dose. Earlier versions of the DEXA scanner emitted radiation which required up to five minutes to scan an area of interest, but the more advanced machines can take as ...


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from www.lexingtondiagnostic.com

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Papp, J. (2011). Quality Management in the Imaging Sciences. St. Louis, MO: Elsevier Mosby

Peripheral DXA scanners. (Online image) Retrieved Feb. 10 2014
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Plank, L. D. (2005). Dual-energy X-ray absorptiometry and body composition.Current
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Tests and Procedures, Bone Density Test. (2011). Retrieved from
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Toombs, R. J., Ducher, G., Shepherd, J. A., & Souza, M. J. (2012). The impact of recent
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