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Tibial Radius Bone Mineral Density (Dual-Energy X-ray Absorptiometry, Whole Blood)

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

This test measures the mineral content of your tibia (one of your lower arm bones) to assess bone density, which helps identify risks for osteoporosis or other bone-related conditions.

Quick summary

["Bone density screening helps prevent fractures and guides treatment for weakened bones."]

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

Key facts at a glance

LOINC
41781-6
Short code
Deprecated Tib-R XR port
Synonyms
Deprecated Tib-R XR port
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
xr
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 Is This Test Done?

Your healthcare provider may recommend this test if you have symptoms like bone pain, fractures, or if you’re at higher risk for osteoporosis due to factors like age, genetics, or certain medications.

What to Expect During the Test

You’ll lie on a table while a low-dose X-ray machine scans your tibia. The process is quick and painless, similar to a regular X-ray.

Preparation Tips

No special preparation is needed, but avoid taking calcium supplements 24 hours before your appointment if instructed by your doctor.

What the Results Mean

Results are compared to a healthy adult reference range to determine bone density. Lower values may indicate bone loss, while higher values suggest stronger bones.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Tibial Radius BMD (DXA)

Frequently asked questions

What causes bone density changes?
Bone density can decline with age, hormonal changes (e.g., menopause), lack of physical activity, poor nutrition, or certain medical conditions or medications.
How often should I get this test?
Your doctor will determine frequency based on your risk factors, but typically every 1–3 years for high-risk individuals.
Can I eat or drink before the test?
You can eat and drink normally, but avoid calcium supplements unless advised otherwise by your provider.
  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