Computed tomography, also called CT, is a computer-aided X-ray technique. An abdominal CT scan produces detailed cross-sectional views of sections of the abdomen. This could be thought of as similar to taking pictures of slices of bread to see the different parts of the loaf.
An abdominal CT scan is recommended for people who have suspected diseases or conditions of the abdomen. A doctor may advise a person to have this test if he or she has one of the following conditions:
A person having a CT scan will need to undress and put on an exam gown. Next, he or she will lie on a narrow table. The table will slide through a machine that looks like a doughnut. This is called the gantry. While the person is in the gantry, an X-ray tube takes pictures of different parts of the person's abdomen to create computer-generated X-ray images.
Some types of CT exams require the person to receive an iodinated dye, which makes some tissues show up better. The dye, also called contrast solution, may be injected into the person's vein or may be given as a drink. Each X-ray emits a very low dose of radiation and takes only seconds. The whole test lasts about 45 minutes.
After the exam, a technician will view the pictures to make sure they can be seen clearly. If they are OK, the person can usually get dressed and is free to leave.