Ultrasound scans

​​About ultrasound scans​

An ultrasound scan uses sound waves to make images of the inside of the body.​

Preparing for you scan

Some types of ultrasound scan need special preparation to help us get clear images. Your appointment letter will include detailed instructions about what to do before your appointment, read it carefully.​

Depending on the type of scan, we may ask you to:

• drink water and not use the toilet
  
• not eat for at least 6 hours before the scan
• change into a hospital gown when you arrive

Full bladder scans

If you're unable to hold a full bladder:

If you have diabetes

If you're diabetic, you don't need to stop eating before your appointment. Eat dry foods such as crackers or toast and bring a snack, such as biscuits or a banana, to eat after your scan.

Types of ultrasound scan

We carry out external scans and, in some cases, internal scans. 

​Pelvic ultrasound examinations are often completed in 2 parts.

Part 1: External scan, trans‑abdominal scan

An external ultrasound scan uses sound waves to create images of the inside of your body.

For pelvic scans, this first part is called a trans‑abdominal scan.

During this scan:

• the sonographer places a small handheld device called a probe on the skin of your lower abdomen
• a gel is used to help the probe move smoothly and create clear images
• you may be asked to have a full bladder, as this helps improve the images​

Part 2: Internal scan, if needed

In some cases, an internal ultrasound scan is needed to provide more detailed images and help with diagnosis. This is the second part of the pelvic examination.

If we think an internal scan is needed, we will:

• explain why it is recommended
• ask for your consent before continuing

If you agree: 

• a slim ultrasound probe is gently inserted into the vagina or rectum, depending on the examination
• the probe is covered with a single‑use protective cover, which is discarded after each use

You can ask for the scan to be stopped at any time.​

Preparing for your appointment

Your appointment letter will tell you exactly what you need to do before your scan, read it carefully before you arrive.

Visit Radiology Department: information for patients for more information about:

• what to expect at your appointment
• changing or cancelling an appointment
• accessibility and language support
• bringing someone with you
• possible appointment fees​
  

​​How long the scan takes​

Your scan will take between 10 and 45 minutes depending on what part of the body is being scanned.

Most scans are completed in around 20 minutes.

​Gender of your healthcare professional

If you have a preference over the gender of the healthcare professional carrying out your scan, let us know in advance.

We’ll try to accommodate your request where possible, but this can't always be guaranteed on the day.​

After the appointment

Most ultrasound examinations do not affect your ability to work or drive, check your appointment letter for any exceptions.​