Figure 6
The overall procedure from computed tomography acquisition to modelling the gastric phantom. (A) Three phases of CTG scans collected with the patient in different positions including the arterial phase in the left posterior oblique (green), portal phase in the supine (yellow), and delayed phase in the prone (red) positions. The portal phase was used as reference (blue outline). (B) The stomach was segmented from the images by the defined thresholds. (C) Registration was performed as follows: rough registration based on supine alignment (C-1) and fine registration based on surface registration algorithm between the stomach images (C-2). (D) The final stomach model with an attached inlet and outlet.
