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Bone Mineral Density by Quantitative Computed Tomography (QCT) of the Spine

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

This test measures the density of your spine bones using a special X-ray technique to help assess your risk of osteoporosis or other bone conditions.

Quick summary

["A spine bone density scan helps doctors check if your bones are strong enough and identify early signs of bone loss."]

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

Key facts at a glance

LOINC
87875-1
Short code
CT T-spine by reconstr
Synonyms
CT T-spine by reconstr
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

Your doctor may recommend this test if you have symptoms like back pain, a history of fractures, or risk factors for osteoporosis such as aging, low body weight, or certain medications. It’s also used to monitor treatment progress for bone-related conditions.

How the Test Works

During the scan, you lie still on a table while a rotating X-ray machine takes precise images of your spine. The machine calculates bone density by comparing it to a standard reference.

Preparation

No special preparation is needed, but you may be asked to remove jewelry or clothing covering the scan area. You’ll likely wear a lead apron for protection.

What to Expect During the Test

The scan takes about 10–15 minutes. You’ll hear a loud clicking noise as the machine rotates around you, but you’ll be able to move freely. Stay still to ensure accurate results.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Spine Bone Density Scan

Frequently asked questions

This test helps diagnose osteoporosis, monitor bone health over time, and guide treatment decisions. Low bone density may indicate a higher risk of fractures, while normal or high density suggests healthy bones.
A low bone density result may prompt further testing or lifestyle recommendations, such as increased calcium/vitamin D intake or physical activity.
FAQ 1: Will I feel any pain or discomfort during the scan?
No, the scan is painless. You may feel a slight pressure from lying still, but there’s no radiation discomfort. If you’re anxious, let your doctor know—they may offer sedation options.
FAQ 2: How often should I get this test?
Your doctor will determine frequency based on your risk factors. Typically, follow-up scans are recommended every 2–5 years if you have osteoporosis or related conditions.
  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