Comparative investigation of subjective image quality of digital intraoral radiographs processed with 3 image-processing algorithms

Li, Gang

doi:10.1016/j.tripleo.2004.02.072

Cited by 10 publications

(6 citation statements)

References 21 publications

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“…Using digital systems, images presentation can be altered by adjusting the characteristic curve and additional filtering of the digital data before displaying the data on the screen. 9 Besides, it is possible to alter the display options for image interpretation after exposure using enhancement procedures available in imaging software. 10 It may improve the visibility of anatomical structures or alterations close to each other, which appear with similar contrasts in the original image.…”

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confidence: 99%

Influence of VistaScan image enhancement filters on diagnosis of simulated periapical lesions on intraoral radiographs

Brasil

Yamasaki

Santaella

et al. 2019

Dentomaxillofacial Radiology

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Objective: To evaluate whether image enhancement filters of VistaScan system improve the diagnostic accuracy of simulated periapical lesions. Methods: 10 sockets were prepared on bovine ribs to fit a bovine tooth. Bone defects were created and successively enlarged providing four groups (n = 10): Group 0, absence of lesions; Group 1, periapical lesions with 1.6 mm in diameter; Group 2, with 1.8 mm in diameter; and Group 3, with 2.1 mm in diameter. Periapical radiographs were taken using a photostimulable storage phosphor plate and DBSWIN software. VistaScan filters were applied and the images were allocated into seven groups: Nonfiltered, Fine, Caries 1, Caries 2, Endodontic, Periodontal and Noise Reduction. All the 280 images were assessed about the presence or absence of periapical lesions. Pixel intensities standard deviation were compared between nonfiltered and filtered images. Two-Way Analysis of Variance and the post hoc Tukey’s test were used to compare area under the ROC curve, sensitivity and specificity. Results: VistaScan filters showed no significant difference for area under receiver operating characteristic curve (p = 0.124), sensitivity (p = 0.835) and specificity (p = 0.832). Area under receiver operating characteristic curve (p = 0.000) and sensitivity (p = 0.000) in 2.1 mm lesions size were significantly higher than in 1.6 mm and 1.8 mm lesions size. Pixel intensities standard deviation was significantly changed in the filtered images compared to nonfiltered ones (p < 0.01), except for Fine in the bone region (p > 0.05). Conclusion: VistaScan enhancement filters do not influence the diagnostic accuracy of simulated periapical lesions. On the other hand, larger lesions were more frequently detected. The filters change the pixel intensities reducing or intensifying the differences between similar regions.

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confidence: 99%

Influence of VistaScan image enhancement filters on diagnosis of simulated periapical lesions on intraoral radiographs

Brasil

Yamasaki

Santaella

et al. 2019

Dentomaxillofacial Radiology

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“…1999, Svanaes et al. 2000, Li 2004). Therefore, manipulation of the digital images was allowed by all observers within the appropriate system software, since this made the study more reminiscent of the clinical environment.…”

Section: Discussionmentioning

confidence: 99%

“…Each investigator was familiar with the grading scheme before the study commenced and deemed whether the radiographs were diagnostically acceptable independently. Various studies have been carried out which suggest that digital equipment may improve the quality of the image, especially if the contrast and density are not optimum (Wenzel 1993, Gotfredsen et al 1996, Yoshiura et al 1999, Svanaes et al 2000, Li 2004). Therefore, manipulation of the digital images was allowed by all observers within the appropriate system software, since this made the study more reminiscent of the clinical environment.…”

Section: Discussionmentioning

confidence: 99%

A comparative study of image quality and radiation exposure for dental radiographs produced using a charge‐coupled device and a phosphor plate system

et al. 2009

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“…Manipulation of images is one of the most important properties of digital radiography 13,14. Several digital processing algorithms are available that enhance the display quality of digital images 14,15.…”

Section: Introductionmentioning

confidence: 99%

Effect of digital noise reduction on the accuracy of endodontic file length determination

et al. 2013

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PurposeThe aim of the present study was to evaluate the measurement accuracy of endodontic file length on periapical digital radiography after application of noise reduction digital enhancement.Materials and MethodsThirty-five human single-rooted permanent teeth with canals measuring 20-24 mm in length were selected. ISO #08 endodontic files were placed in the root canals of the teeth. The file lengths were measured with a digital caliper as the standard value. Standard periapical digital images were obtained using the Digora digital radiographic system and a dental X-ray unit. In order to produce the enhanced images, the noise reduction option was applied. Two blinded radiologists measured the file lengths on the original and enhanced images. The measurements were compared by repeated measures ANOVA and the Bonferroni test (α=0.05).ResultsBoth the original and enhanced digital images provided significantly longer measurements compared with the standard value (P<0.05). There were no significant differences between the measurement accuracy of the original and enhanced images (P>0.05).ConclusionNoise reduction digital enhancement did not influence the measurement accuracy of the length of the thin endodontic files on the digital periapical radiographs despite the fact that noise reduction could result in the elimination of fine details of the images.

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Comparative investigation of subjective image quality of digital intraoral radiographs processed with 3 image-processing algorithms

Cited by 10 publications

References 21 publications

Influence of VistaScan image enhancement filters on diagnosis of simulated periapical lesions on intraoral radiographs

Influence of VistaScan image enhancement filters on diagnosis of simulated periapical lesions on intraoral radiographs

A comparative study of image quality and radiation exposure for dental radiographs produced using a charge‐coupled device and a phosphor plate system

Effect of digital noise reduction on the accuracy of endodontic file length determination

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