Tolerance limit value of brightness and contrast adjustment on digitized radiographs

[摘要] The aim of this study was to measure the tolerance limit value of brightness and contrast adjustment on digitized radiograph with apical periodontitis and early apical abscess. Brightness and contrast adjustment on 60 periapical radiograph with apical periodontitis and early apical abscess made by 2 observers. Reliabilities tested by Cohen's Kappa Coefficient and significance tested by wilcoxon test. Tolerance limit value of brightness and contrast adjustment for apical periodontitis is -5 and +5, early apical abscess is -10 and +10, and both is -5 and +5. Brightness and contrast adjustment which not appropriate can alter the evaluation and differential diagnosis of periapical lesion.

[发布机构] Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Universitas Indonesia, Jakarta, Indonesia^1;Department of Polymer Science, University of Akron, 170 University Avenue, Akron; OH; 44325-3909, United States^2

[效力级别] 医药卫生 [学科分类] 卫生学

[关键词] Cohen's kappas;Contrast adjustment;Differential diagnosis;Digitized radiographs;Tolerance limits;Wilcoxon test