Fig. 1

The operation interface of graph cut process and the results of orbital soft tissue segmentation. a shows user interface of graph cut process and the ROI of phantom CT image after volume data clipping. Here is the right side of phantom orbit. User labeled seed points of different tissues on this slice. Red line marked extraocular muscle, blue line marked orbital fat, maroon line marked bone and HA prosthesis. All the slices in ROI volume data would be segmented according to these labels. b shows the segmentation results of the marked slice and other slices by graph cut process. The red part shows muscle region and blue part shows fat region