When should it be done? of DEXA scan

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A DEXA scan involves a low dose of X-rays (less than a normal X-ray) being passed across the body. The X-rays are separated into beams of differing intensity. This enables the scan to detect the density of bone and soft tissue separately.

The scan usually takes between 10 and 30 minutes, depending on what part of the body is being examined, and whether a central or peripheral scanner is being used. In order to check for osteoporosis, the doctor will scan the lower back and hips. The forearm will also be scanned, because it has a different level of calcium content from other body parts.

No preparation for the test is required, and depending which part of the body is being scanned, the patient may be able to remain fully dressed, in clothes without metal fastenings. It is a painless procedure and the patient can go straight home afterwards.

Portable scanners are available in some GP surgeries and can be used to check the bone mass density of the heel bone.