MRIs are acquired as thin slices in the axial, coronal, or sagittal plane. T2 weighting describes the technique used to acquire images in a particular way that causes fluid to look bright (white). Gray matter appears mid to light gray, and white matter is darker than gray matter. Most vessels are black. The subcutaneous fat is sometimes white, and sometimes dark, such as if a technique called ‘fat saturation’ has been employed.