Bone Mineral Densitometry
Davis’s Laboratory and Diagnostic Tests Online, powered by Unbound Medicine, provides nurses and students access to 400+ test monographs containing reference ranges, indications, patient preparation and result interpretation. Explore these free sample topics:
-- The first section of this topic is shown below --
BMD, DEXA, DXA, SXA, QCT, RA, ultrasound densitometry.
Dual-energy x-ray absorptiometry (DEXA, DXA): Two x-rays of different energy levels measure bone mineral density and predict risk of fracture.
Single-energy x-ray absorptiometry (SXA): A single-energy x-ray measures bone density at peripheral sites.
Quantitative computed tomography (QCT): QCT is used to examine the lumbar vertebrae. It measures trabecular and cortical bone density. Results are compared to a known standard. This test is the most expensive and involves the highest radiation dose of all techniques.
Radiographic absorptiometry (RA): A standard x-ray of the hand. Results are compared to a known standard.
Ultrasound densitometry: Studies bone mineral content in peripheral densitometry sites such as the heel or wrist. It is not as precise as x-ray techniques but is less expensive than other techniques.
To evaluate bone density related to osteoporosis.
Area Of Application:
Lumbar spine, heel, hip, wrist, whole body.