A Computed Tomography (CT) scan uses X-rays and computer technology to create detailed cross-sectional images of the body. These images, often referred to as “slices,” provide views of bones, soft tissues, and blood vessels. This article focuses on scans performed without contrast material. Proper preparation helps ensure the scan’s success and accuracy.
Key Preparations Before Your Scan
Preparing for a CT scan without contrast involves straightforward guidelines to ensure clear imaging. For most non-contrast CT scans, fasting is generally not required, allowing individuals to eat and drink normally. However, it is always advisable to confirm specific dietary instructions with the healthcare provider or imaging center, as some abdominal scans might have different recommendations.
Regarding medications, patients can usually continue taking their prescribed medications before a non-contrast CT scan. It remains important to discuss any concerns about current medications with a physician well in advance of the scan date. This proactive communication helps clarify any potential interactions or specific instructions.
Comfortable, loose-fitting clothing is recommended for a CT scan. Patients will need to remove all metal objects, including jewelry, eyeglasses, dentures, hairpins, and any clothing with metal zippers or buttons, as these items can interfere with the X-ray images and create artifacts. Sometimes, patients may be asked to change into a hospital gown.
Communicating relevant medical history to both the referring doctor and the imaging staff is important. This includes informing them about a potential pregnancy, as radiation exposure during pregnancy may lead to birth defects, although the risk from CT scans is generally considered low. It is also helpful to disclose any history of claustrophobia or other significant health conditions to ensure appropriate accommodations and support.
What to Know for Scan Day
On the day of the CT scan, arriving early is often recommended to allow time for check-in procedures and any necessary paperwork. This ensures a smooth start to the appointment and addresses any last-minute questions. The total time spent at the facility, including preparation, can range from 30 to 45 minutes, even though the actual scanning process is quicker.
Once in the scan room, the patient will lie on a movable table that slides into a large, doughnut-shaped scanner. During the scan, it is essential to remain as still as possible to ensure clear images, and patients may be asked to hold their breath for short periods. The machine itself makes buzzing or whirring noises, but the procedure is painless.
The actual CT scan usually takes only a few minutes. After a non-contrast CT scan, there are typically no special post-procedure instructions, and individuals can generally resume their normal daily activities immediately. Scan results are usually sent to the referring doctor, who will discuss the findings with the patient.