How to Prepare for a CT Scan

A CT scan, or computed tomography scan, is a medical imaging procedure that provides detailed images of the inside of the body. A brain CT is a crucial diagnostic tool for detecting various neurological conditions and is often used to guide treatment decisions.

Preparing for a CT scan can be a source of anxiety for many patients and their caregivers. This guide aims to provide concise information to help you prepare for the procedure, ensuring a smooth and stress-free experience.

A CT scan involves the use of X-rays and computer technology to create cross-sectional images of the body. The process is non-invasive and typically quick, often taking less than 30 minutes.

During the scan, the patient lies on a table that slides into a large, ring-shaped machine. The machine rotates around the patient, capturing images from different angles.

Once the images are obtained, technicians will compile the images from the study. These images will then be sent to a radiologist for review. The radiologist will generate a report for your care team within the following days.

Proper preparation for a CT scan is essential for several reasons:

• Accuracy: Ensuring that the images captured are clear and precise can aid in accurate diagnosis and treatment planning.
• Safety: Some preparations, such as fasting or avoiding certain medications, can help minimize potential risks associated with the scan.
• Comfort: Being well-prepared can reduce anxiety and make the experience more comfortable.

Before the scan, have a detailed discussion with your healthcare provider. Speak to them about:

• Medical History: Inform your doctor about any medical conditions, allergies, or previous reactions to contrast materials.
• Medications: Discuss any medications you are currently taking, as some may need to be paused before the scan.
• Pregnancy: If you are pregnant or suspect you might be, inform your doctor, as CT scans involve ionizing radiation, which can be harmful to a developing fetus.

Depending on the type of CT scan, you may be required to follow specific dietary restrictions:

• Fasting: Some scans require fasting for a few hours before the procedure. This is particularly common if a contrast dye is used.
• Hydration: Staying hydrated is generally recommended unless instructed otherwise by your doctor.

Contrast dye is often used in CT scans to enhance image clarity. Contrast can be administered orally, or intravenously, depending on the part of the body being examined.

Inform your healthcare provider about any known allergies, especially to iodine or shellfish, as these can indicate a potential allergy to contrast dye. Additionally, speak to your doctor about any kidney disease or conditions.

Wear loose, comfortable clothing that is easy to remove on the day of the scan. You will likely be asked to change into a hospital gown.

Avoid wearing jewelry or any metal objects, as these items can reflect the X-ray beams, and interfere with the imaging process.

Plan to arrive at the facility early to complete any necessary paperwork and to allow time for any pre-scan preparations. This can help reduce stress and ensure that the study proceeds in a timely manner. 

• Positioning: You will lie on a table that moves through the CT scanner. It is important to remain still to ensure clear images.
• Communication: The radiology technician will communicate with you throughout the procedure, providing instructions and updates.
• Sensation: If contrast dye is used, you might feel a warm sensation or a metallic taste in your mouth. These are normal and typically subside quickly.

• Observation: You may be observed for a short period, especially if contrast dye was used, to monitor for any adverse reactions.
• Hydration: Drinking plenty of fluids can help flush the contrast dye from your system.
• Results: The results of the CT scan will be reviewed by a radiologist and shared with your care team, who will discuss them with you during a follow-up appointment.

• Support: Provide emotional support and reassurance to the patient, especially if they are anxious about the procedure.
• Transportation: Offer to drive the patient to and from the appointment, particularly if they are feeling nervous or if sedation is used.
• Communication: Help facilitate communication between the patient and healthcare providers, ensuring that all questions and concerns are addressed.

• Preparing for a CT scan involves understanding the procedure, following specific instructions, and ensuring clear communication with healthcare providers.
• By taking these steps, patients and caregivers can help ensure a successful and stress-free experience.
• Remember, your healthcare team is there to support you, so don't hesitate to reach out with any questions or concerns.

• United States Food & Drug Administration (FDA): CT Scan Risks
• National Institute of Biomedical Imaging and Bioengineering (NIBIB): CT Scan
• American Association of Neurological Surgeons (AANS): Cerebrovascular Imaging
• National Health Service (NHS) [UK]: CT Scan