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CT Scan involves rotating an X-ray source around the patient’s body while detectors capture the X-rays that pass through.
These images are created by combining a series of X-ray images taken from different angles and using computer processing to produce a 3D representation of the internal structures.
Here are some common types as below:
Preparation:
Fasting: Patients may need to fast for several hours before the scan, especially if contrast dye will be used.
Contrast Dye: In some cases, contrast agents (oral or intravenous) are administered to enhance the visibility of specific tissues or blood vessels.
Clothing: Patients are asked to remove any metal objects (jewelry, belts) and may be provided with a hospital gown.
Positioning:
The patient lies on a motorized table, usually on their back (supine position), though side or prone positions may be used depending on the area of interest.
The table slides into the CT scanner, a large doughnut-shaped machine.
Scanning:
As the table moves through the scanner, the X-ray tube rotates around the patient to take images from different angles.
Patients may be asked to hold their breath for short periods to avoid blurring the images.
The scan itself is painless and usually takes only a few minutes, though the preparation may take longer.
Post-Procedure:
Patients are typically monitored for a short time, especially if contrast dye was used.
Drinking fluids is encouraged to help flush the contrast dye from the body.
Image Processing:
The collected data is processed by a computer to produce detailed images, which a radiologist then interprets.
The results are often sent to the referring physician for further analysis or treatment decisions.