Texture is a function of pixle size and, in a given region of interest, reflects the variability of the grey scale values. 5 MHz capable of insonating up to 4 cm and retrievable documentation of relevant findings. Magnetic Resonance Imaging with or without angiography may play a role in the future. Component areas should be calculated from their length and width and ulcerations measured from their width. The risk of cerebrovascular ischemia is clearly related to the degree of stenosis.
Texture is still under investigation as a prognostic factor.