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X - Ray Lumbar Spine (L S) Flexion & Extension Views

Also referred as

Lumbar Spine X-Ray – Extension & Flexion

LS Spine Functional X-rays – Flexion & Extension

For men & women

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The X - Ray Lumbar Spine (L S) Flexion & Extension Views test uses X rays to generate the images of lumbar spine which consists of 5 vertebrae. This test is used to check instability of spine in spondylolisthesis which is a spinal condition that causes lower back pain. The patient is asked to bend forward for the flexion view and to lean back from the lower back for the extension view.

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Preparation for this test

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FAQs related to X - Ray Lumbar Spine (L S) Flexion & Extension Views

What are the drawbacks of a bone X-ray?

X-ray images give a very clear view of the bones. However, it does not provide a good visual image of the soft tissues like tendons, muscles or fat tissue under the skin. Even the bone microfractures or complicated spine injuries are not clearly visible on the X Ray images. Apart from this, it also exposes the patient to some amount of radiations but the benefit of the information gained from an X-ray image outweighs the risk of radiations.

Who interprets the X-ray results?

The interpretation of an X-Ray image is carried out by a radiologist who analyses or reads the X-ray image and prepares a report of the findings which is shared with the patient.

Content created by

Dr. Swati Gupta (Anand)

MBBS, MD Lab Medicine

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Last Updated

11th Oct 2025