Fig. 2
From: Correlation between spatial resolution and ball distortion rate of panoramic radiography
The suggested image layer by applying ball distortion rate thresholds (20%) in OP-100®. a The balls satisfying ball distortion rate threshold are shown in red, and the balls that did not satisfy that threshold are shown in blue. b The balls shown in red were matched to their original position. Since the average jaw shape is well located in the image layer, it is considered that this device is suitable for taking diagnostic images