Exploring the CT Scan Procedure
CT (computerized tomography) scan uses a computer and X-rays to create detailed images of body organs. It is performed by a specialized operator known as a radiographer and can be carried out during a patient’s stay in the hospital or a visit to a imaging facility. CT scans produce detailed images of all structures inside the body including blood vessels, internal organs and bones.
They are used to diagnose conditions such as injuries to internal organs, damage to bones, problems with the flow of blood, cancer and stroke. CT scans can also be used in guiding further treatments or tests like in establishing the size, shape and location of a tumor to allow doctors to perform biopsies or drain an abscess. Doctors can also use a CT scan to monitor conditions like checking the size of the tumor during and after cancer treatment.
• Preparing for a CT scan — It is advised to avoid eating anything a few hours before your CT scan to help with clear imaging. Communicate any kidney problems or allergies or if you are on diabetes medication to allow doctors to make special arrangements. You should avoid CT scans if you are pregnant unless it’s an emergency. You will be required put on loose and comfortable clothes and avoid jewellery or any clothes with metals such as zippers.
• Before the CT scan — You’ll be given a special dye known as a contrast to swallow to help improve image quality. The contrast can also be injected through the vein or passed through an enema. If you are anxious about the scan, inform the radiographer. They may arrange for a sedative if necessary. You will put on a gown before the scan starts.
• During the CT scan — You are to lie on your back on a flat bed that passes into the CT scanner. You should lie still and breathe normally when taking the scan to ensure clear images. The scanner has a ring that rotates around a section of your body when passing through it. It is operated by the radiographer from the next room who you can communicate with via the intercom. At certain points, the radiographer will ask you to breathe in, hold your breath or breathe out. The scan process lasts from 10–20 minutes.
• After the CT scan — There are no after-effects from a CT scan, and you can leave the facility soon afterwards. You will be good to eat, drink, drive and go to work as usual. If you had the contrast, you would be asked to stay for an hour under observation to see if you react to it or not. The contrast is harmless and will come out of your body through urine. The scan results take a while to process from the computer and are analysed by a radiologist who will then write a report and send it to your doctor. The doctor will discuss the results with you after their review of the report.
CT scans are not only quick and painless; they are also safe unless you have an allergic reaction to the contrast dye. The scanners are designed to ensure that the patient is not exposed to high-level doses of radiation. You can talk to your doctor beforehand about the potential risks of the CT scan if you have any concerns.
About Author
PET / CT of Las Colinas was developed with both patients and physicians in mind and our services have been used for various types of disease; primarily in detecting, staging and monitoring cancer, but also in heart disease and brain disorders.
