Fig. 10From: Electronic cleansing in computed tomography colonography using AT layer identification with integration of gradient directional second derivative and material fraction model a, d, g and j are the axial CTC images of the EC results from EC prop . b, e, h and k are the axial CTC images of the EC results from EC prev [16]. c, f, i and l are the axial CTC images without applying any ECBack to article page