Fig. 3
From: Performance of gimbal-based dynamic tumor tracking for treating liver carcinoma
Distribution of failed (red) and successful (blue for both imagers, orange for imager1, green for imager2) FM detection depending on the angle θ of the marker relative to the imager as well as the average surrounding intensity I. Every point represent a single marker in a single imager. All points are semi-transparent for a better visualization of overlapping points. On the top and right, the relative amount of successful and failed detections is displayed