Bone Densitometry Risks
According to The World Health Organisation some women may not be aware that they are at risk of developing osteoporosis because many bone mineral densitometry (BMD) tests only give results based on two sites, the hips and the spine, which do not give an accurate picture of the whole skeleton.
In some cases the problems are compounded where equipment using ultrasound is used as this measures other factors related to bone strength rather than its density. The risk is greatest when women are under the age of 65 when they are being tested.
(British Medical Journal; 2000; 321: pp396-397)