Centres of Excellence -> Radiology & Imaging -> How to Prepare for a CT Scan?

How to Prepare for a CT Scan?

Preparation for computed tomography (CT) is a crucial step to ensure precise and effective imaging. It's important to note that CT imaging utilizes ionizing radiation, therefore a valid referral from a specialist physician is necessary before each examination.

Here are several steps you can follow to prepare for a CT scan:

  • Ensure to bring all reports and previous images, if available
  • Bring a recent (within a month) blood urea and creatinine report to the examination
  • In some cases, you may be instructed to fast for a specific period before the CT scan, so follow dietary instructions to ensure optimal imaging result
  • In certain situations, a contrast agent may be used. If prescribed, inform the medical staff about any previous reactions to iodine-based contrast agents.
  • Pregnancy is a contraindication for all CT scans, so pregnant individuals should not undergo CT examinations, regardless of the stage of pregnancy
  • Patients with a history of allergic reactions to iodine should consult their specialist regarding alternative imaging methods
  • Diabetic patients taking metformin tablets should refrain from taking the medication on the day of the examination and for 48 hours afterward. Consult with your physician for alternative therapy during this period
  • Before the examination, remove all metallic objects from your person, such as jewelry, watches, or clasps, as metallic objects interfere with the quality of the images

By following these guidelines and cooperating with the medical staff, you can ensure that the CT scan is optimally performed and provides the necessary information for your physician to evaluate your health condition.

What does a CT scan involve?

During a CT scan, the patient lies on a table that moves into the opening of the X-ray scanner. The scanner then generates a thin beam of X-rays that passes through the body, while detectors record data used to create three-dimensional images. CT scanning is particularly impressive because it can simultaneously capture multiple layers (slices), resulting in high-quality images and shorter examination times.

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