Preparation for these scans can vary: - MRI: Patients may need to remove metal objects and may be given a contrast agent to enhance image quality. Fasting is usually not required. - CT: Patients may need to fast for a few hours before the scan. A contrast agent may be administered orally or intravenously to improve image clarity. - PET: Patients are usually required to fast for several hours before the scan. They may also be advised to avoid strenuous activity the day before to reduce muscle uptake of the tracer.
