Ultrasound
What is an ultrasound examination?
Ultrasound uses high-frequency sound waves to create images of organs, tissues and other structures inside the body. A handheld transducer sends sound waves into the body and receives returning echoes, which are converted into images on a screen.
Because images are produced in real time, ultrasound can help the examiner assess movement, examine a tender area and observe certain structures from different angles. Doppler techniques can also help assess blood flow when requested.
Ultrasound does not use ionising radiation. The quality and type of images obtained depend on the area examined and the clinical question.
What to expect
- Preparation depends on the area being examined. An abdominal scan may require fasting, while some pelvic examinations require a full bladder.
- Follow the specific instructions provided when your appointment is arranged rather than preparing the same way for every ultrasound.
- Wear clothing that allows access to the relevant body area and bring your referral and previous imaging reports if available.
- Tell the examiner about the location of your symptoms, previous operations and any relevant medical history.
- You will usually lie on an examination couch while gel is applied to the skin over the area being assessed.
- The examiner moves a handheld probe over the skin and may apply gentle pressure to obtain different views.
- You may be asked to turn onto your side, change position or briefly hold your breath.
- For some pelvic examinations, an internal ultrasound may be discussed when appropriate; the team should explain the examination and obtain your consent.
- The gel is wiped away and most patients can resume normal activities straight away.
- You can generally eat and drink normally unless your healthcare professional has advised otherwise.
- If further imaging or follow-up is recommended, your referring clinician will discuss the next step with you.
- The findings are documented and communicated through the usual reporting process.
Safety and results
- Ultrasound does not use X-rays or other ionising radiation.
- The examination is generally well tolerated, although pressure over an already tender area may cause temporary discomfort.
- Tell the examiner if you feel pain or discomfort so the technique can be adjusted where possible.
- The examiner will use the ultrasound technique appropriate to the clinical question and explain any additional examination that may be needed.
Please contact our team if you have questions about your examination or preparation instructions.
The ultrasound images and observations are assessed and documented for your referring healthcare professional. Depending on the reason for the scan, the report may describe an organ's appearance, a measured structure or an observed blood-flow pattern. Ultrasound findings sometimes need to be considered alongside blood tests or other imaging. Your referring clinician will explain the results and whether further assessment is needed.
For questions about your findings or treatment, please speak to your referring healthcare professional.
For questions about your findings or treatment, please speak to your referring healthcare professional.