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Fig. 4A —PowerPoint (Microsoft) screen shots show refinement of contours of pancreas (top), inferior vena cava and aorta (middle), and vertebral body (bottom). Objects were drawn at later stage but are shown for relevance. Dashed lines separate structures to show they have been captured from different screens to show anchor points of all objects (Edit Points can be applied to only one object at same time). Initial drawings prepared with Curve tool, except for pancreas (top), which was drawn with Freeform tool.