T1-weighted images are a type of magnetic resonance imaging (MRI) scan that highlights differences in tissue properties based on their relaxation times. These images are particularly useful for visualizing anatomical structures, as they provide clear contrast between fat and water content in tissues. In T1-weighted imaging, fat appears bright, while fluids like cerebrospinal fluid (CSF) appear darker. This contrast helps radiologists identify abnormalities such as tumors, lesions, or other pathologies. T1-weighted images are often used in conjunction with other imaging techniques to provide a comprehensive view of the body's internal structures.