DEXA

What is Bone Densitometry?

Doctors use an enhanced form of x-ray technology called dual-energy x-ray absorptiometry (DEXA). DEXA bone densitometry is today’s established standard for measuring bone mineral density. DEXA is a quick, painless procedure for measuring bone loss.

Common uses of the Procedure

DEXA bone densitometry is most often used to diagnose osteoporosis, a condition that often affects women after menopause but may also be found in men. Osteoporosis involves a gradual loss of calcium, causing the bones to become thinner, more fragile and more likely to break.

The DEXA test can also assess your risk for developing fractures. DEXA is also effective in tracking the effects of treatment for osteoporosis or for other conditions that cause bone loss.

DEXA Procedure

The DEXA machine sends a thin, invisible beam of low-dose x-rays with two distinct energy peaks through your bones. One peak is absorbed mainly by soft tissue and the other by bone. The soft tissue amount can be subtracted from the total and what remains is a patient’s bone density.

All devices feature special software to compute the data and display them on a computer monitor, allowing an accurate diagnosis to be made. The amount of radiation used is extremely small – less than one-tenth the dose of a standard chest x-ray. The procedure is painless and no anaesthesia is required.

How should I prepare for the DEXA procedure?

There is no special preparation required for dexa bone densitometry. You will be asked to remove jewellery, eyeglasses and any other metal objects. Women should always inform their doctor or radiologist if there is any possibility that they are pregnant.

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