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Vertebral fracture assessment (DEXA VFA)

A Vertebral fracture assessment (DEXA VFA) is a dexa test of the spine. It shows hidden spine fractures during a bone density scan. Typical effective dose about 0.002 to 0.04 mSv, similar to under a week of natural background radiation (about 3 mSv a year).

General health information, not a diagnosis. In an emergency, call 102. Always consult a qualified health professional.

What it shows

Hidden spine fractures during a bone density scan.

Why it is done

Osteoporosis assessment.

Preparation

Stop calcium tablets 24 hours before; wear clothes without metal.

Radiation & safety

Typical effective dose about 0.002 to 0.04 mSv, similar to under a week of natural background radiation (about 3 mSv a year). Tell staff if you are or might be pregnant; abdominal and pelvic exposure is avoided in pregnancy unless essential.

How long it takes

5 minutes. General information, not a diagnosis. Results must be interpreted by a qualified health worker.

Sample type

DEXA

Consult a doctor to interpret results — a single test does not make a diagnosis.

Related conditions

entry-health-condition-osteoporosis

Where to get this near you

Care near you

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Common questions

What does a vfa show?
Hidden spine fractures during a bone density scan.

Why is a vfa done?
Osteoporosis assessment.

How do I prepare for a vfa?
Stop calcium tablets 24 hours before; wear clothes without metal.

Does a vfa use radiation?
Typical effective dose about 0.002 to 0.04 mSv, similar to under a week of natural background radiation (about 3 mSv a year). Tell staff if you are or might be pregnant; abdominal and pelvic exposure is avoided in pregnancy unless essential.

How long does a vfa take?
5 minutes

Why is Vertebral fracture assessment (DEXA VFA) done?
Osteoporosis assessment.

How do I prepare for Vertebral fracture assessment (DEXA VFA)?
Stop calcium tablets 24 hours before; wear clothes without metal.

Is Vertebral fracture assessment (DEXA VFA) safe in pregnancy?
Typical effective dose about 0.002 to 0.04 mSv, similar to under a week of natural background radiation (about 3 mSv a year). Tell staff if you are or might be pregnant; abdominal and pelvic exposure is avoided in pregnancy unless essential.

SI text CC BY 4.0; RadiologyInfo.org (ACR/RSNA) and MedlinePlus linked as references only, no text copied.

Sources: SI health summary (own words); decoder imaging pack; RadiologyInfo.org and MedlinePlus as references only

Emergency — call102