Comparison of the diagnostic accuracy of direct digital radiography system, filtered images, and subtraction radiography

Abstract

Background:To compare the diagnostic accuracy of three different imaging systems: Direct digital radiography system (DDR-CMOS), four types of filtered images, and a priori and a posteriori registration of digital subtraction radiography (DSR) in the diagnosis of proximal defects.Materials and Methods:The teeth were arranged in pairs in 10 blocks of vinyl polysiloxane, and proximal defects were performed with drills of 0.25, 0.5, and 1 mm diameter. Kodak RVG 6100 sensor was used to capture the images. A posteriori DSR registrations were done with Regeemy 0.2.43 and subtraction with Image Tool 3.0. Filtered images were obtained with Kodak Dental Imaging 6.1 software. Images (n = 360) were evaluated by three raters, all experts in dental radiology.Results:Sensitivity and specificity of the area under the receiver operator characteristic (ROC) curve (Az) were higher for DSR images with all three drills (Az = 0.896, 0.979, and 1.000 for drills 0.25, 0.5, and 1 mm, respectively). The highest values were found for 1-mm drills and the lowest for 0.25-mm drills, with negative filter having the lowest values of all (Az = 0.631).Conclusion:The best method of diagnosis was by using a DSR. The negative filter obtained the worst results. Larger drills showed the highest sensitivity and specificity values of the area under the ROC curve.

Influence of Image Filters and Variation in Horizontal Angle of Incidence of X-ray Beam in Digital Interproximal Radiographs for Diagnosis of Secondary Caries in Esthetic Restorations

“…As seen in the results presented in the present manuscript, the application of different radiographic filters did not result in an improvement in the diagnosis of caries, corroborating the results found by Takeshita et al 3 Haiter-Neto et al 13 Booshehry et al 17 Belém et al 19 and…”

“…possibility of manipulating the images captured, by means of software programs and radiographic filters, with the purpose of improving the image quality, and enabling better analysis of its content. 3,17,18 The present article evaluated the different filters associated with different horizontal angulations in interproximal radiographs with simulated secondary caries in teeth restored with resin composite. In this study analysis with ROC curve were used to evaluate the effect of negative, pseudocolor 1 and pseudocolor 2 filters on the diagnosis of occlusal secondary caries.…”

“…These programs allow image manipulation, such as adjustment in brightness and contrast, determination of the gray level, inversion of gray tones, application of pseudocolors, among other features. 3,[11][12][13] Therefore, as far as we know, few studies have compared the different digital image filters in the diagnosis of secondary caries lesions, with the influence of horizontal angulation. The aim of the present research was to evaluate the accuracy of diagnosing secondary caries artificially created in the pulp wall of premolars with mesio-occlusal-distal (MOD) restorations made with resin composite, by means of digital image filters, with alteration in the horizontal angulation in the interproximal radiographic technique, using a digital radiographic sensor complementary metaloxide-semiconductor (CMOS).…”

“…So that preventive and not only curative action is taken, the early diagnosis of caries is fundamental. [1][2][3] Among dental caries, there are secondary caries, which are the type that occur in intimate contact with restorations and are considered the major cause of loss of restorations. Composite resins are widely used to meet the growing concern about esthetics.…”

Diagnostic Accuracy of Image Enhancement in Intra-Oral Direct Digital Radiography in the Assessment of Interproximal Caries

“…The negative filter showed weak outcomes (18). We concluded from this that using many filters that enhance digital images may be confusing.…”