The limit values for brightness and contrast adjustment in digital panoramic radiography

[摘要] There is an overall lack of studies about digital panoramic radiography. The application of image enhancement techniques is still being done based on the operator's preferences, since there is no objective limitation. The aim is to evaluate the limit values of the brightness and contrast adjustment in digital panoramic radiography. Digital panoramic radiographs were divided into three groups (dark, medium, and light), and the contrast and brightness adjustments were done using Digora for Windows. The static evaluations were done using three criteria: 1 if the image had lower quality, 2 if there was no difference and 3 if the image had better quality. The radiographic changes differed in each group depending on the initial imaging conditions. The brightness adjustment limit values in the dark and medium groups were -10 and +20, respectively, and -20 and +10 in the light group. The contrast adjustment limit values in all of the groups were -10 and +10.

[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] Brightness adjustments;Contrast adjustment;Imaging conditions;Limit values;Panoramic radiograph;Radiographic changes;Static evaluation