bmd

About DEXA Bone Mineral Analysis

What is the test used for?
Dual Energy X-ray Absorption (DEXA) is used to measure bone mineral density. The most common cause for loss of bone density is osteoporosis.

What is the preparation for the test?
There is no preparation required.

Will I have to undress?
You will be asked to remove most of your clothes, but may keep on your underpants. Clips, buckles, zippers etc would otherwise get in the way and cause an error in the readings. You will be asked to change into a cotton gown.

Where will I be for the test?
You will be asked to lie on a flat table, which is padded, and quite comfortable. The examination is performed with you lying on your back.

How is the test done?
A thin beam of x-ray energy is passed through the lower spine and hip regions. A computer calculates how much of x-ray energy is absorbed by the bones and compares the results with what is expected in a young (20 year old) person, and also with what is expected for a person of your age, sex and race. The results are plotted on a graph, and a report given by the radiologist.

How long will it all take?
15 to 20 minutes.

And after the test?
You can leave after the scan is done. If you need to wait for the results, it may take 30 minutes, or more to generate the graph and the report.

Radiation?
Low dose ionising radiation is used.