CT Scan

A CT (Computed Tomography) scan is a medical imaging test used to produce detailed cross-sectional images of the body, using computer-processed combinations of many X-ray measurements taken from different angles.

How it Works

The CT scanner uses X-rays to create detailed pictures of the inside of the body. The scanner is a large, doughnut-shaped machine that contains an X-ray tube and detectors. The X-ray tube rotates around the body, taking multiple images from different angles. The detectors measure the amount of X-rays that pass through the body and send this information to a computer, which reconstructs the images into detailed cross-sectional pictures.

Types of CT Scans

• Non-contrast CT scan: This type of scan uses only X-rays to produce images.
• Contrast CT scan: This type of scan uses a contrast agent, such as iodine or barium, to highlight specific areas of the body.
• Spiral (helical) CT scan: This type of scan uses a continuous X-ray beam to produce detailed images of the body.
• High-speed CT scan: This type of scan uses advanced technology to produce high-quality images quickly.

Uses of CT Scans

CT scans are used to diagnose and monitor a wide range of medical conditions, including:

• Cancer
• Injuries, such as internal bleeding or bone fractures
• Vascular diseases, such as aneurysms or blood clots
• Neurological disorders, such as stroke or brain tumors
• Infections, such as pneumonia or abscesses
• Musculoskeletal conditions, such as osteoporosis or arthritis

Risks and Side Effects

While CT scans are generally safe, there are some risks and side effects to consider:

• Radiation exposure: CT scans use X-rays, which can increase the risk of cancer.
• Allergic reactions: Some people may be allergic to the contrast agent used in CT scans.
• Kidney damage: The contrast agent can cause kidney damage in some individuals.
• Claustrophobia: Some people may experience anxiety or discomfort during the scan due to the enclosed space of the scanner.

Preparation and Procedure

To prepare for a CT scan:

• Avoid eating or drinking for several hours before the scan
• Remove any metal objects, such as jewelry or glasses
• Wear comfortable clothing
• Follow any specific instructions provided by your doctor or the imaging center

The procedure typically takes 15-30 minutes to complete, during which time you will lie on a table that slides into the scanner. You may be asked to hold your breath or remain still for short periods of time.

Results and Follow-up

The results of the CT scan will be interpreted by a radiologist, who will provide a report to your doctor. Your doctor will discuss the results with you and recommend any further testing or treatment as needed.