Densitometry is a method for diagnosing osteoporosis, or condition of reduced bone mass, which is associated with increased risk of bone fractures. There are two main forms of osteoporosis. The first is about 50 years of menopausal women, a consequence of a reduction in estrogen levels, female sex hormones in the body, while another form, called "senile", occurs about 70 years of age as a result of lower calcium metabolism at an earlier age. Bony mass builds up in the youth and age of sexual maturity. The amount of bone mass rises about 30 years. After the 40s it gradually loses, about 0.5 to 1 percent per year. Almost every fourth woman over the age of 60 is suffering from osteoporosis. Women who have entered menopause early or who have been surgically removed from their ovaries before the age of 45, are not affected by hormone replacement therapy more often than men. Additional risks include family history of the disease, inadequate calcium intake, use of steroid drugs, hormonal disorders such as hyperthyroidism ("excessive work of the thyroid gland"), hyperparathyroidism (excessive parathyroid hormone secretion), Cushing's disease (chronic anorexia-induced syndrome) liver disease and digestive system disorders. Although the main victims of osteoporosis are women, men may also be affected by it. The cause of osteoporosis in men is very often alcoholism. And the loss of testosterone, the main male sex hormone, can stimulate it.
The "golden standard" and the only reliable method of screening osteoporosis is bone densitometry-bone density measurement (bone mass). The most recent technique is based on the "dex method" that uses x-rays of two different energies, and shows the bone mineral density calculated in grams per square centimeter. The method is totally painless, no special preparation is required, you can normally eat and drink, and drink the therapy you normally take before you are examined. Also, you can wear it as you like but with no metal parts, buttons, clasps ... The search is simple and fast, takes 5-10 minutes. The radiation dose received at densitometry is so small that even persons working with the device do not specifically protect them and are 1-3 mRem, which corresponds to the dose of radiation received during a 3-9 hour plane flight or Earth's surface of cosmic radiation in lasting 3-9 days. For comparison, the average radiation dose is 300 mRema during lung scan. The average radiation dose on Earth's surface that people receive annually is about 400 mRema
Ultrasonic measurement of bone mineral density is well-matched with DXA results, no x-rays but is not conducive to tracking the effect of treatment due to high oscillation of results, more of a screening method.
Bone-to-bone banding is an uncertain and imprecise method. The bug in estimating bone mass is 30-50%. Based on this search, the diagnosis of osteoporosis is only reliably established when bone loss is greater than 30-40%. Based on bone density (the lumbar vertebrae and thigh bone will be measured) your physician will be able to estimate the condition of your bone (ie whether osteoporosis is or not) and recommend further procedures or best therapy for you.