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:: Volume 33, Number 4 (Fall 2015) ::
J Dent Sch GYEAR__, 33(4): 245-253 Back to browse issues page
Diagnostic Accuracy of Digitized Images Using Different Resolution Settings of Digital Camera in Detection of Proximal Caries
Z. Jaberi Ansari, S. Valizadeh, Z. Hosseini, A. Ghaznavi *
Assistant Professor , aisanghaznavi@yahoo.com
Abstract:   (1150 Views)

Objective: When none of digital systems and scanners is accessible and it is essential to have digitized images of conventional radiographs, digital cameras can be used. The Aim of this study was to investigate whether digital images obtained by different resolutions of a digital camera are matched to the original radiographs in evaluation of caries.

Methods: In this diagnostic accuracy in vitro study the conventional radiographs of168 proximal surfaces of 84 teeth were produced, Then they were digitized with digital camera in three different resolutions high (2048x1536), medium (1600x1200) and low resolution (480x460). Images were stored in Photoshop7.0 software, and were evaluated by5 observers to show the presence and depth of the caries. Cronbach’s &alpha calculated inter-observers agreement and in order to calculate the agreement with original conventional radiographs Kappa index was used.

Results: In assessing the presence of caries, the agreement between low, medium and high resolutions with original radiographs were 0.286, 0.235 and 0 respectively. Also, assessing the depth of the caries agreement was reported0.21, 0.338 and 0.412 respectively. In most instances, there was a fair agreement between the different resolutions and original radiographs. The highest inter-observer’s agreement was reported in diagnosis of the presence of the caries with using high resolution (&alpha=0.837) and the lowest inter-observer’s agreement was reported in diagnosis of the depth of the caries with medium resolution(&alpha=0.762).There was no significant difference reported in observations of different resolutions and original images.

Conclusion: Using of high-resolution cameras did not show a significant difference with medium and low resolutions in caries evaluations. Therefore, considering the increase in the file size and difficulties in cameras selection, using of high-resolution digital cameras is not necessary in order to increase the diagnostic accuracy of digitized images.

Keywords: Dental Caries, Dental Radiography, Diagnosis, Digital, Photography, ROC curve
Full-Text [PDF 125 kb]   (312 Downloads)    
Type of Study: Original Article | Subject: Special
Received: 2015/11/7 | Accepted: 2015/11/7 | Published: 2015/11/7
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Jaberi Ansari Z, Valizadeh S, Hosseini Z, Ghaznavi A. Diagnostic Accuracy of Digitized Images Using Different Resolution Settings of Digital Camera in Detection of Proximal Caries . J Dent Sch. 2015; 33 (4) :245-253
URL: http://jds.sbmu.ac.ir/article-1-1442-en.html
Volume 33, Number 4 (Fall 2015) Back to browse issues page
مجله دانشکده دندانپزشکی دانشگاه علوم پزشکی شهید بهشتی Shahid Beheshti University Dental Journal
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