The short answer
Ultrasound uses sound waves to create images and does not use X-ray radiation. It can be used to examine selected soft tissues. Whether it is the appropriate test depends on the structure and question your clinician wants to assess.
Understanding the problem
For an external scan, gel is applied and a handheld probe is moved over the area. The examiner may ask you to change position. Preparation varies with the examination, so the instructions for a different type of ultrasound may not apply.
Care and next steps
Explain where symptoms occur and any movements that reproduce them. The scan is one part of assessment; a result should be discussed with the referring clinician. Ask whether further examination or another investigation is needed if the question remains unresolved.
Prepare for your consultation
Bring the referral request and any relevant previous imaging. Wear clothing that makes the area accessible and tell the examiner about tenderness before pressure is applied. Confirm whether you will receive an immediate explanation or a report later. At your follow-up, ask how the result affects the treatment plan rather than assuming that every visible change needs a procedure.
Common questions
Is ultrasound always a substitute for MRI?
No. The tests answer different questions, and suitability depends on the body part and suspected problem.
Medical sources & further reading
This patient education guide was approved for publication by Dr Shahrukh Khan on 11 September 2026. It cannot diagnose your symptoms or replace a personalised clinical assessment. Editorial policy · About the doctor.