Validation of the accuracy of esophagus 3D image
By delineating the outlines of the esophagus at the 4-6 height levels (Figure 1, green lines ), 3D esophagus image was created and placed in the Carto3 image along with the 3D LA CT image (Figure 2 ). With these procedures, we could visualize the esophagus in the Carto3 image and also could see the relative location of the ablation catheter tip to the esophagus accurately during the ablation procedure.
We asked the patients to swallow the contrast medium before sedation and esophagography was taken. For confirmation of the anatomical position of the esophagus, the image was transferred into Carto3 system by using a Carto UNIVUTM module and displayed together with the ICE esophagus 3D image (Figure 3).