CT Scan

What is a CT Scan?

A computerised tomography scan, also known as a “CT Scan” or “CAT Scan,” is a medical imaging technique that uses X-rays to create detailed images of the body.

Unlike traditional X-rays, which produce a flat, 2D image, a CT scan takes multiple images from different angles & uses a computer to create cross-sectional images, or “slices,” of the body.

These slices provide a more comprehensive view of the internal structures, which allows doctors to diagnose & monitor various medical conditions.

What Conditions Can Be Diagnosed During a CT Scan?

CT scans are a valuable diagnostic tool for various medical conditions. They can provide detailed images of various structures within the body, which helps doctors accurately identify and assess abnormalities. Here are some common conditions that can be diagnosed using CT scans:

Bone and Joint Conditions:

Fractures
Dislocations
Arthritis
Osteoporosis
Tumours (benign and malignant)

Chest Conditions:

Pneumonia
Lung cancer
Pneumothorax (collapsed lung)
Aortic aneurysm
Pulmonary embolism

Abdominal Conditions:

Liver disease
Pancreatitis
Kidney stones
Gallstones
Abdominal aortic aneurysm
Appendicitis
Inflammatory bowel disease (IBD)

Brain and Nervous System Conditions:

Stroke
Brain tumours
Brain bleeds
Hydrocephalus
Multiple sclerosis

Other Conditions:

Heart disease (e.g., coronary artery disease)
Lymphoma
Infections (e.g., abscesses)
Foreign body detection

Procedure of CT Scan

Before undergoing a CT scan, you may be administered a contrast agent, a special dye that enhances the visibility of specific structures in the images. This contrast agent can be administered orally, rectally, or intravenously. If you feel anxious or claustrophobic about the procedure, it is essential to communicate your concerns to the radiographer. They can provide advice to help you feel calm and may recommend a sedative if necessary. Before the scan begins, you’ll be asked to remove any metal objects, such as jewellery, as they can interfere with the scanning equipment.

During the CT scan, you’ll typically lie on your back on a flat bed that moves through the CT scanner. The scanner is a ring-shaped machine that rotates around a specific area of your body as you pass through it. The radiographer will operate the scanner from a different room. You’ll be able to hear and communicate with them through an intercom. It’s crucial to remain still and breathe normally during each scan to prevent blurring of the images. You may be instructed to inhale, exhale, or hold your breath at certain points. The scan usually takes around 10-20 minutes.

Following a CT scan, you should experience minimal side effects and can typically return home shortly afterwards. You can resume your normal activities, including eating, drinking, working, and driving. The results of your CT scan won’t be immediately available. A computer will process the images, and a radiologist (a specialist in interpreting medical images) will analyse them. The radiologist will then write a report and send it to the referring physician, who will discuss the results with you. The typical duration for this procedure is a few days or weeks.

What are the Risks of CT Scan?

CT scans are helpful for getting a detailed picture of your body. They use a type of energy called radiation to do this. While this radiation is stronger than a normal X-ray, it’s still considered safe.

Although the risk of cancer from CT scans is low, it might be slightly higher if you have many scans. This is especially true for children.

Even though there’s a slight risk, the benefits of CT scans are usually greater. Doctors try to use the least amount of radiation needed to get the necessary information.

Cost of CT Scan

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Frequently Asked Questions about CT Scan

01. Are CT scans safe?

CT scans are usually safe, quick, and painless. However, there’s a slight chance you might have an allergic reaction to the dye used during the scan, and you will be exposed to X-ray radiation. The amount of radiation you’re exposed to depends on how much your body is scanned. Generally, the radiation exposure during a CT scan is similar to the amount of natural radiation you receive from the environment over a few months to a few years. It’s believed that the radiation from CT scans could slightly increase the risk of developing cancer many years later, although this risk is thought to be very small (less than 1 in 2,000).

02. How to prepare for a CT scan?

If you have an upcoming CT scan, your appointment letter will tell you if you need to do anything to prepare for it. This might include not eating for a few hours before your appointment to help get clear images. It’s important to let the hospital know if you have any allergies or kidney problems or if you’re taking medicine for diabetes. If you’re pregnant, you should also tell the hospital because CT scans aren’t usually recommended for pregnant women, except in emergencies, due to the small risk of harm to the baby from X-rays.

03. How long does a CT scan take?

A CT scan appointment usually takes 10-20 minutes. If you’re having a CT scan with oral contrast, it could take up to an hour and 15 minutes. After the scan, a radiologist will review the images and share the results with your doctor.

04. Are CT scan results immediate?

You should receive your results within 1 or 2 weeks. If you haven’t heard anything after a couple of weeks, contact the doctor who arranged the test.

05. What is the recovery time for a CT scan?

A CT scan is a painless and safe procedure that doesn’t require any recovery time.

06. Who cannot have a CT scan?

Doctors usually don’t recommend CT scans for children or those who need multiple scans, as too much radiation exposure in childhood can lead to cancer in adulthood. If you’re allergic to iodine contrast dyes, used for CT scans, discuss it with your doctor.

07. What is the next step following a CT scan?

If a special dye was used for a CT scan, the technician might watch you for a while to check for any side effects or reactions, such as itching, swelling, a rash, or trouble breathing.

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