T2, or T2-weighted imaging, is a type of magnetic resonance imaging (MRI) technique that highlights differences in tissue composition. It is particularly useful for visualizing fluid-filled structures, making it effective in detecting conditions like tumors and inflammation. T2 images show high signal intensity for fluids, allowing for clearer differentiation between various tissues. In T2-weighted images, the contrast is primarily based on the relaxation time of protons in different tissues after being exposed to a magnetic field. This technique is commonly used in neurology to assess brain conditions, as well as in musculoskeletal imaging to evaluate joint and soft tissue disorders.