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Bone Mineral Density Measurement by Dual-Energy X-ray Absorptiometry (DXA) for Skeletal Sites

Published: August 9, 2026Updated: August 16, 2026

This test measures the density of bones in specific areas of your skeleton to assess whether you have low bone mass, which could increase your risk of fractures.

Quick summary

["DXA scans help doctors check for conditions like osteoporosis that weaken bones over time."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
95924-7
Short code
CT Skeletal for BMD
Synonyms
CT Skeletal for BMD
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
ct
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

Why This Test Is Done

Doctors may recommend this test if you have symptoms like bone pain, frequent fractures, or if you’re at higher risk for osteoporosis due to age, genetics, or certain health conditions. It’s also used to monitor bone health before or after treatments that might affect bone density.

How the Test Works

You’ll lie on a table while a machine takes low-dose X-ray images of specific bones, such as the spine, hips, or wrists. The scan measures bone mineral content without exposing you to harmful radiation levels.

What to Expect Before the Test

No special preparation is needed, but you may be asked to wear a gown. Avoid wearing jewelry or metal objects in the scanning area. If you’re pregnant, let your doctor know before the test.

What the Results Mean

Results are compared to a healthy adult’s bone density. Lower density may indicate conditions like osteoporosis, while higher density could suggest stronger bones. Your doctor will interpret results in the context of your medical history and symptoms.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

This test plays a critical role in diagnosing and managing bone-related conditions by identifying areas of concern early. Early detection can help prevent fractures and guide treatment decisions, such as lifestyle changes or medications.

Short name

DXA Bone Scan

Frequently asked questions

How long does a DXA scan take?
A DXA scan typically takes about 15 to 30 minutes, depending on which bones are being scanned. The process is quick and painless.
Will I feel any pain or discomfort during the scan?
No, you won’t feel any pain. You’ll simply lie still on a table while the machine takes images. Some people may feel slight pressure from the table, but it’s not uncomfortable.
Can I eat or drink before the test?
You can eat and drink normally before the test. No special preparation is required, but avoid wearing metal objects or jewelry in the scanning area.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy