Ultrasound imaging

Imaging using sound waves, including assessment of some soft tissues and guidance of procedures.

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Ultrasound for selected soft tissues

Diagnostic ultrasound creates images with sound waves rather than x-rays. A probe on the skin can assess selected muscles, tendons, superficial joints and peripheral nerves. Movement can be observed in real time. Ultrasound can also guide some procedures performed by appropriately trained professionals.

Gel improves contact between the probe and skin. The examination is generally well tolerated, although pressure may reproduce local tenderness. Bone limits ultrasound transmission: in adults, ultrasound does not replace MRI for direct assessment of deep discs, the spinal cord or the whole spinal canal. Image quality depends on the question, anatomical access and operator experience. Diagnostic ultrasound differs from therapeutic ultrasound. A normal examination of accessible soft tissue does not exclude a problem hidden behind bone or outside the scanned area.

Indications and interpretation

Before ordering the test, the clinician should identify the question it needs to answer and how the result could change decisions. Routine imaging for low back pain without warning signs does not necessarily improve care. A result describes structures; it does not measure all aspects of pain or a person's capacity to recover. Age, previous conditions, the affected side and the physical examination help distinguish a relevant abnormality from an incidental finding. More visible detail is useful only when interpreted appropriately.

After the results

The responsible clinician should explain which findings need action, follow-up or no particular intervention. Bringing previous studies can prevent unnecessary repetition. At TAGMED, imaging can help select or exclude particular care options; it cannot establish that traction, laser treatment or manual care will work. Decisions remain clinical and must consider contraindications. Progressive weakness, altered saddle sensation or a new inability to urinate must not wait for a routine imaging appointment: these symptoms need emergency assessment. Follow the preparation and safety instructions supplied by the imaging centre. Ask how and when results will be communicated rather than assuming that silence means everything was normal.

Frequently asked questions

Can ultrasound replace every spinal MRI?

No. Deep structures protected by bone are not assessed in the same way.

Does an abnormality necessarily explain pain?

No. Agreement with symptoms and examination findings must be checked.

Should previous results be brought?

Yes when available; comparison may prevent unnecessary repeat studies.

Who explains the report?

The responsible clinician interprets it within the whole clinical picture.

Does the test determine treatment?

It contributes to decisions but does not replace clinical assessment and discussion of options.

Educational information from The Spine Page. This entry does not replace an individual assessment. Documentary version: October 12, 2026. Sylvain Desforges, B.Sc., D.O., N.D., osteopath and naturopath.