(radiograph) is a painless medical test that helps physicians diagnose
and treat medical conditions. Radiography involves exposing a part of
the body to a small dose of ionizing radiation to produce pictures of
the inside of the body. X-rays are the oldest and most frequently used
form of medical imaging.
Bone density scanning, also called dual-energy x-ray absorptiometry
(DXA or DEXA) or bone densitometry, is an enhanced form of x-ray
technology that is used to measure bone loss. A DEXA scan is today's established standard for measuring bone mineral density (BMD).