1. A method of coding a visual representation of one or more plaque regions in a vessel, said method comprising: segmenting, via a computer, the visual representation of the vessel to identify structures associated with the vessel; classifying at least one region in the vessel as a plaque region and associating a probability to the classified region; displaying on a display device associated with the computer, the at least one plaque region using a visual highlight associated with the classification for the at least one plaque region, together with another region in the vessel classified as a plaque region using another visual highlight associated with a classification different from the classification of the at least one plaque region, and wherein said visual highlight comprising at least one of a pattern and a color; and shading the visual highlight of the at least one plaque region displayed on the display device based on the probability associated with the at least one plaque region.