1. A method of assessing uncertainty of features in images rendered in a medical visualization system, comprising: accepting user input on a display to selectively apply at least one sensitivity lens to a region of interest (ROI) of a portion of a visualization of a rendered image shown on the display; and electronically displaying different visualizations of only the portion of the image associated with the sensitivity lens to assess uncertainty of at least one feature in the image, wherein the displaying step is carried out by displaying the different visualizations of only the portion of the image associated with the sensitivity in at least one animation mode that generates a sequence or series of alternate visualizations based on known potential sources of uncertainty in a medical imaging pipeline.