Before the test, it's crucial to ensure that your small bowel is empty. You'll be asked to fast from both food and drink for six hours prior to the examination. 

Upon arrival, you'll be provided with an x-ray gown to wear and will need to undress to underpants and a singlet. 

Female patients should inform medical staff if they are pregnant or suspect they might be.

A radiologist (a doctor) and a radiographer (an x-ray technician) will be present during the procedure. They will explain the process, so feel free to ask any questions if you're unsure.

As the small bowel is not typically visible on an x-ray due to its soft tissue nature, barium is used to coat its inner lining, making it visible on the x-ray screen.

During the procedure, a small lubricated plastic tube will be gently inserted through your nostril or mouth into your stomach by the doctor or nurse. Though slightly uncomfortable, the discomfort can be minimised with the use of anesthetic jelly and spray. If the discomfort becomes unbearable, inform the doctor immediately.

Once the tube is positioned correctly, the doctor will guide it into the first part of the duodenum using a TV monitor. Maxalon, which promotes peristalsis (a series of wave-like muscle contractions that move food through the digestive tract), may be introduced through the tube or injected into a vein. The barium will then flow through the tube into the small bowel while the radiologist takes a series of x-ray pictures. You'll be asked to hold your breath for each picture.

After the Radiologist has seen your x-rays and the test is completed, you can eat or drink normally. You will notice the barium in your bowel motions for the next few days. 

The radiologist will review the pictures and provide a written report to your referring doctor.