Distortion and magnification of four digital cephalometric units
Conclusion: The metal millimeter calibration ruler is an accurate reference for linear measurement magnification correction. Because of unpredictability and machine specificity, the magnification and distortion of a cephalometric unit should be calibrated for the estimation of cephalometric measurement error.
Source: Nigerian Journal of Clinical Practice - Category: Rural Health Authors: GY Song G Li WH Lu B Han TM Xu Source Type: research