Bone Mineral Density Shows the Condition of Osteoporosis
Bone mineral density denotes the amount of matter per cubic centimeter of bones that can be measured by means of a procedures called densitometry. Bone mineral density tests are useful to determine the condition of osteoporosis. It is a condition characterized by a decrease in the density of bone that decreases its strength and resulting in fragile bones. Osteoporosis leads to abnormally of bone that is compressible, like a sponge. This disorder of the skeleton weakens the strength of bone and results in frequent fractures in the bones.
The bone density procedures use least amount of radiation exposure for the diagnosis of osteoporosis. Bone density is greatly influenced by genetic factors, which in turn are modified by environmental factors and medications. The quantity of bone minerals accumulates during childhood and reaches a peak by around age 25. Bone density then is maintained for about 10 years. After age 35, both men and women will normally lose 0.3-0.5% of their bone density per year as part of the aging process.
The Dual energy X-ray absorptiometry (DEXA) scan is believed to be the most accurate bone mineral density test to determine osteoporosis. It is short for dual-energy x-ray absorptiometry and is capable to detect even 1% change in bone density. During the test, a person lies in bed under a scanner and a plastic arm that radiates x-rays. The results of the bone density test are scaled in terms of three parameters, such as Z-score and the T-score. There are some other useful tests called qualitative ultrasound, single photon absorptiometry, digital X-ray radiogrammentry, and single energy X-ray absorptiometry.