Figure 10b. Effect of different rendering techniques and evaluation software on lesion conspicuity. (a) Three-dimensional endoluminal CT image of an anthropomorphic colon phantom only faintly shows a small (4-mm), simulated flat lesion (crosshairs). (b) Three-dimensional endoluminal CT image obtained with a more recent version of different software shows improved conspicuity of the simulated lesion (arrow).