When educating a client about a CT scan of the brain, which instruction should the nurse provide?

When preparing a client for a CT scan of the brain, it is essential to emphasize the importance of remaining very still during the test. This instruction is crucial because even slight movements can result in blurred images, affecting the quality and accuracy of the scan. High-quality images are necessary for accurate diagnosis and evaluation of the brain's structure.

While some procedures might require fasting or sedation, these are not universally applicable to all CT scans, and the specific protocol can vary based on the facility or the patient's medical condition. Therefore, focusing on the need to remain still ensures that the client understands one of the primary actions necessary for a successful outcome of the scan.