Common questions, short answers: most scans are safe and the benefit usually outweighs any small risk; ultrasound and MRI use no radiation; you generally need a doctor's referral for a Medicare rebate; bulk-billed scans cost nothing; ultrasound and MRI are preferred in pregnancy; and your results go to your referring doctor to discuss with you.
Key takeaways
- Most scans are safe, and the benefit usually outweighs any small risk.
- Ultrasound and MRI use no radiation; X-ray, CT and nuclear medicine do.
- You generally need a referral for a Medicare rebate; bulk-billed scans cost nothing.
- Results go to your referring doctor, who explains what they mean for you.
Short answers to the questions we’re asked most. Each links to a fuller guide.
Are scans safe?
For a scan your doctor has recommended, generally yes. Some tests use a small amount of radiation, but the dose is kept as low as possible and the benefit of an accurate diagnosis usually far outweighs the small risk.[1] Read more about radiation risk →
Which scans use radiation, and which don’t?
No radiation: ultrasound and MRI. Use radiation: X-ray, CT, fluoroscopy, mammography and nuclear medicine.[1] Compare the scans →
Do I need a referral?
For a Medicare rebate, you generally need a referral (request) from a doctor — usually your GP or a specialist.[2] How referrals work →
How much will it cost?
If the clinic bulk bills and you have a valid referral, you pay nothing. Otherwise you pay the “gap” above the Medicare rebate. Always ask whether a scan is bulk billed before booking.[2] Imaging costs explained →
Can I have a scan if I’m pregnant?
Ultrasound and MRI (no radiation) are preferred in pregnancy. X-ray, CT and nuclear medicine are generally avoided unless needed — though a single scan is low-risk. Always tell staff you could be pregnant.[1] Imaging in pregnancy →
Will the contrast injection make me feel anything?
For an iodine contrast injection (CT/angiogram), a brief warm flush and metallic taste are normal and pass in seconds. Reactions are usually mild. About iodine contrast →
When will I get my results?
The radiologist sends a written report to your referring doctor; the person who performs your scan can’t give results on the day. Discuss them with the doctor who referred you.[1] What a radiologist does →
Sources
- RANZCR / InsideRadiology — Radiation risk of medical imaging — www.insideradiology.com.au/radiation-risk/
- Services Australia — Medicare and the MBS — www.servicesaustralia.gov.au/medicare
