(A) The distribution of TD in the three sectors (inside the AF ring, IN; on the AF ring, ON; outside the AF ring, OUT) in the binarization method. Each dot represents the TD of each of the 68 points in HFA 10-2 for a patient, and N represents the number of points. There were significant differences among all sectors (IN vs. ON, P = 0.016; ON vs. OUT, P < 0.001; IN vs. OUT, P < 0.001). (B) The distribution of TD in the three sectors (IN, ON, OUT) in the freehand method. Each dot represents the TD of each of the 68 points in HFA 10-2 for a patient, and N represents the number of points. There were significant differences among all sectors (all P < 0.001, ***P < 0.001).