Skip to content

Bone Mineral Density (BMD) Measurement of the Femoral Neck Using Dual-Energy X-ray Absorptiometry (DEXA)

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

This test measures the amount of bone mineral in your upper thigh bone (femoral neck) to assess bone strength and help detect conditions like osteoporosis.

Quick summary

["Assesses bone health and risk of fractures by measuring bone density in a key fracture-prone area."]

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

Key facts at a glance

LOINC
104944-4
Short code
CT Femur ArMass for BMD
Synonyms
CT Femur ArMass 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 Matters for Bone Health

Bone density is crucial for preventing fractures, especially in older adults or those with conditions like osteoporosis. The femoral neck is a critical site for hip fractures, which can be life-threatening. This test helps doctors determine if you’re at risk for weakened bones and guide treatment decisions.

How the Test Works

DEXA (Dual-Energy X-ray Absorptiometry) is a painless, quick scan using low-dose X-rays to measure bone mineral density in your femoral neck. It provides a precise measurement of bone strength without radiation exposure beyond normal background levels.

What to Expect Before the Test

No special preparation is needed. You’ll wear a gown and lie still on a table while the machine takes a few quick images. The process takes about 10–15 minutes. If you have metal implants or prosthetics, let your doctor know beforehand.

What the Results Mean

Results are compared to a healthy population of the same age and sex to determine your bone density status. While specific numeric thresholds (like T-scores) are used clinically, your doctor will interpret the results in the context of your overall health and risk factors.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Femoral Neck BMD

Frequently asked questions

What causes bone density to change?
Bone density can decline due to aging, hormonal changes (e.g., menopause), lack of physical activity, poor nutrition (low calcium/vitamin D), smoking, excessive alcohol use, or certain medications. Family history of osteoporosis or fractures also plays a role.
How often should I get this test?
Your doctor may recommend this test if you’re postmenopausal, have a family history of osteoporosis, are frail, or have conditions like rheumatoid arthritis. Typically, follow-up tests are scheduled every 2–5 years, depending on your risk profile.
Can I prevent bone loss?
Yes! Key strategies include eating a diet rich in calcium and vitamin D, staying physically active (weight-bearing exercises like walking), avoiding tobacco and excessive alcohol, and taking medications if prescribed. Lifestyle changes can significantly slow bone density loss.
  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