Your Ultrasound Scan, Explained
A plain-language guide to ultrasound scans: what they are, how to prepare and what happens in the room. General information only.
Start here
Booked for an ultrasound and not sure what to expect? HealthSono explains sonography in everyday words: how the scan works, what you may be asked to do beforehand and what the appointment feels like from start to finish.
The short version
Sound, not radiation
Ultrasound uses high-frequency sound waves and a handheld probe to make pictures.
Usually painless
You may feel gentle pressure and cool gel on the skin.
Often quick
Many scans take somewhere between a quarter of an hour and an hour.
Before your appointment
Read your letter
Preparation depends on the scan type. Your instructions come first.
Wear easy clothes
Two-piece outfits make it simpler to uncover the area being scanned.
Food and drink
Some scans ask you to fast or to drink water beforehand.
Bring a list
Medicines you take and questions you want to ask.
This is general information, not medical advice. Always follow the instructions from your own care team.
Common questions
Walk through it first
Our article what happens during an ultrasound, step by step takes you from the waiting room to going home.
Ultrasound scans explained in plain language for patients