How a CT Scan is Performed and Why it's Important

A CT scan can be done at the Imaging Center in a hospital or diagnostic laboratory. It is a painless procedure that typically takes about 30 minutes. During the scan, the patient has to change into a gown and remove metal objects.

For certain CT scans, a contrast material may help highlight specific areas of the body. This can be given to the patient as a drink, an injection into the vein, or as an enema. The contrast material may have a slight taste or cause a warm sensation during injection.

During the scan, the patient will lie on a table that moves slowly through a large, doughnut-shaped machine called a CT scanner. The machine will rotate, capturing images of the body. The patient may also be asked to hold breath for a short period of time, usually fewer than 15 to 20 seconds. A technologist monitors from a separate room, he can see and hear the patient. During the CT scan, the patient can talk to the technologist using an intercom system. The technologist may ask to hold breath at specific moments to prevent the images from becoming blurry. This helps ensure the clarity and quality of the scan. The table moves back out of the scanner when the examination is over.

After the scan, the patient can resume normal activities. If contrast material was used, the patient may receive special instructions and be advised to drink plenty of fluids to help flush it out of the system. The CT images will be interpreted by a radiologist, who will provide a report to the doctor, who ordered the test.

While CT scans are generally considered safe, it is crucial for patients to inform their doctor if they are pregnant. This is because minimizing radiation exposure during pregnancy is essential to safeguard the developing fetus. Additionally, providing a comprehensive medical history that includes recent illnesses, existing medical conditions, current medications, and any allergies is vital when discussing a patient’s health before undergoing any medical procedure or treatment.