Figure 1.

In ITK-SNAP software, region of interest was determined in a square area in all three planes of views (A). “Segment 3D” tool was used and same threshold level with the original software (Ez3D2009) was determined (B). Then the reference points were selected on the cavity for semiautomatic segmentation (C). When the “Start segmentation” tool was used, the software automatically segmented the cavity starting from the reference points using the contrast differences on the greyscale images. Thus the 3D model and the volume in mm3 were obtained with the software (D).