Imaging

Medical imaging uses technology to produce pictures or information about structures inside the body. Examples include X-rays, ultrasound, CT and MRI. Each method has different strengths, limitations and safety considerations. A clinician chooses imaging to answer a specific question, rather than ordering a scan simply because a symptom is worrying.

How is the type of scan chosen?

The decision depends on what needs to be seen, how urgently information is required and your circumstances. Some methods use ionising radiation, while ultrasound and MRI do not. That does not make one method universally best or remove the need for individual safety checks.

Ask what the scan is intended to investigate and whether the result is likely to change treatment. Sometimes examination, observation or a different test is more useful. More detailed imaging can also identify incidental findings that need explanation.

For the Australian guidance behind this explanation, see Healthdirect Australia: MRI scan - Healthdirect Australia.

What should I check before attending?

Confirm the exact test, preparation, appointment location and cost. Tell the imaging provider about pregnancy possibility, implants, previous contrast reactions and relevant medical conditions. Preparation varies, so do not fast or stop treatment unless instructed.

Bring the request and relevant previous images or reports if asked. Comparing earlier studies may help interpretation. If pain, claustrophobia or disability affects your ability to complete the scan, discuss it in advance so the team can consider suitable arrangements.

What happens after the images are taken?

A qualified clinician, often a radiologist, interprets the study and sends a report. Arrange follow-up with the referring clinician to understand the findings in context. An abnormal phrase in a report does not necessarily explain every symptom, and a normal scan does not end every investigation.

See Doccio's imaging information. A doctor decides whether a request is appropriate. Acute severe symptoms may need emergency assessment and immediate investigations, rather than an outpatient scan arranged through routine telehealth.

Where to go next

Read imaging to understand the relevant service. A doctor decides whether a consultation, examination, referral or another pathway is appropriate for your situation.