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Lower back (lumbar spine) X-ray

A Lower back (lumbar spine) X-ray is a x-ray test of the lower back. It shows alignment, degeneration, fractures, slipped vertebra. Typical effective dose 1 to 1.5 mSv, similar to about 4 to 6 months 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

Alignment, degeneration, fractures, slipped vertebra.

Why it is done

Back pain with red flags, injury, deformity.

Preparation

Usually no preparation. Remove metal and jewellery from the area. Tell staff if you are or might be pregnant.

Radiation & safety

Typical effective dose 1 to 1.5 mSv, similar to about 4 to 6 months of natural background radiation (about 3 mSv a year). Tell staff if you are or might be pregnant; the benefit usually outweighs the small risk, and shielding or alternatives can be considered.

How long it takes

10 to 15 minutes. General information, not a diagnosis. Results must be interpreted by a qualified health worker.

Sample type

X-ray

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

Uses your location once to list the nearest facilities. Nothing is stored.

Common questions

What does a lumbar spine x-ray show?
Alignment, degeneration, fractures, slipped vertebra.

Why is a lumbar spine x-ray done?
Back pain with red flags, injury, deformity.

How do I prepare for a lumbar spine x-ray?
Usually no preparation. Remove metal and jewellery from the area. Tell staff if you are or might be pregnant.

Does a lumbar spine x-ray use radiation?
Typical effective dose 1 to 1.5 mSv, similar to about 4 to 6 months of natural background radiation (about 3 mSv a year). Tell staff if you are or might be pregnant; the benefit usually outweighs the small risk, and shielding or alternatives can be considered.

How long does a lumbar spine x-ray take?
10 to 15 minutes

Why is Lower back (lumbar spine) X-ray done?
Back pain with red flags, injury, deformity.

How do I prepare for Lower back (lumbar spine) X-ray?
Usually no preparation. Remove metal and jewellery from the area. Tell staff if you are or might be pregnant.

Is Lower back (lumbar spine) X-ray safe in pregnancy?
Typical effective dose 1 to 1.5 mSv, similar to about 4 to 6 months of natural background radiation (about 3 mSv a year). Tell staff if you are or might be pregnant; the benefit usually outweighs the small risk, and shielding or alternatives can be considered.

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