Figure 12. Display screen of the syngo software platform shows fused PET-CT images in the sagittal, coronal, and axial planes of a patient with recurrent esophageal carcinoma. Placing the crosshairs on the tumor automatically coregisters it in all three orthogonal planes. By dragging the vertical bar (arrow) along the horizontal line in the lower right quadrant of the screen, the PET and CT weighting of the image can be altered. In this image, the CT to PET ratio is 75% to 25%.