Related Experiment Video
Updated: Aug 17, 2026

Measuring the Complete-arch Distortion of an Optical Dental Impression
Published on: May 30, 2019
A simplified method to obtain perceptibility curves for direct dental digital radiography
H C Stamatakis1, K Yoshiura, X Q Shi
1Department of Oral Radiology, Karolinska Institutet, Stockholm, Sweden.
Objectives:
To derive and test a simplified method to construct Perceptibility Curves (PCs) for dental digital detectors.
Methods:
Mathematical expressions were derived to make it possible to construct PCs from viewer data obtained at two exposures, one low and one high. PCs were constructed applying these expressions and compared with data previously obtained employing the conventional method.
Results:
PCs constructed according to the simplified method agree extremely well with conventionally obtained data.
Conclusions:
Reliable PCs may be constructed according to the simplified method.

