Click on image to view larger version.

Figure 4 Registration Quality of 3-Dimensional Scar Map

Three-dimensional scar map (purple mesh) is superimposed and registered to endocardial electroanatomic map (solid green) using a visual alignment algorithm. The software of the clinical mapping system displays for each endocardial point the distance to the registered positron emission tomography scar map (green <5 mm, yellow <10 mm, and red >10 mm). Good overall registration quality is seen in right anterior oblique (A), left lateral (B), and apical views (C), displaying green and yellow markers. The only significant registration error (red markers) is found within the area of the apical scar. This error is due to the absence of the positron emission tomography wall in areas of scar (see the Methods section for further explanation), which results in the software measuring the distance to the closest scar border, and does not represent a real registration error. LAT = local activation time.