Impact of lossy compression on diagnostic accuracy of radiographs for periapical lesions

Eraso, Francisco Eduardo; Analoui, Mostafa; Watson, Andrew B.; Rebeschini, Regina

doi:10.1067/moe.2002.122640

Cited by 25 publications

(15 citation statements)

References 15 publications

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“…Most insurance carriers accept electronic images. The results of a study to evaluate lossy compression for endodontic pretreatment digital radiographs suggest that high compression ratios can have a severe impact on the diagnostic quality of digital radiographs for the detection of periapical lesions (9). Analysis of the effect of a reduction in size of digital images on diagnostic outcome using a series of 100 Visualix III (Gendex Dental Systems) images using size 10 and 15 endodontic files on maxillary and mandibular premolars revealed that reduction in size may cause less detectability as well as loss of diagnostic information (10).…”

Section: Image Compressionmentioning

confidence: 99%

Digital and Advanced Imaging in Endodontics: A Review

Nair

2007

Journal of Endodontics

246

191

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Section: Image Compressionmentioning

confidence: 99%

Digital and Advanced Imaging in Endodontics: A Review

Nair

2007

Journal of Endodontics

246

191

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“…[18]. However, in another study, high lossy compression ratios are found to have a severe impact on the diagnostic quality of digital intraoral radiographs for the detection of periapical lesions [19].…”

Section: Discussionmentioning

confidence: 90%

“…Currently used panoramic digital image sizes are reported to exceed 4 MB [8]. The effects of compression in intraoral digital radiography have been studied in various studies till today [16][17][18][19]. In this study, it was aimed to evaluate the subjective image quality of digital panoramic radiographs which were lossless and lossy compressed for the visualization of various anatomical structures.…”

Section: Discussionmentioning

confidence: 99%

The effects of compression on the image quality of digital panoramic radiographs

2011

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Size reduction through compression is an important issue that needs to be investigated for possible effects on image quality. The aim of the present study was to evaluate the subjective image quality of digital panoramic radiographs which were lossless and lossy compressed for the visualization of various anatomical structures. Fifty-five digital panoramic radiographs in Tagged Image File Format (Tiff) were used in the study. Two types of lossy (Joint Photographic Experts Group (Jpeg)) and one type of lossless (Lempel-Ziv-Welch) compression were applied to the original radiographs. These radiographs were evaluated by two observers separately for the visibility of some anatomical structures with visual grading. Mean quality number for each radiograph was obtained. The differences between the mean quality numbers in each compression and original image mode were evaluated with Friedman test. Pair-wise comparisons revealed that there were statistically significant differences between all groups (p = 0.000) for all comparisons except for Jpeg_1 and Jpeg_2 groups. Kappa statistics was used to evaluate inter- and intra-observer agreements. Intra-observer agreements were ranging from 0.229 to 1.000 and inter-observer agreements were ranging from 0.154 to 1.000. The observers had better inter- and intra-observer agreements in highly compressed Jpeg_1 images. The anatomical structures evaluated in this study had better visibility in Tiff images than Jpeg images except for mandibular canal and mental foramen. While Jpeg compressed images offer high inter- and intra-observer agreements, the visibility of anatomical structures are better in Tiff images except for mandibular canal and mental foramen.

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“…[15] A study in 1998, Parsell et al [19] studied detection of oral cancellous bone lesions with various methods and found that DSR improved the diagnosis of a cancellous bone defect. Another study by DaneshMeyer et al [20] assessed post guided tissue regeneration of the radiographic crestal alveolar bone mass comparing the change in clinical periodontal attachment level using DSR. They concluded that crestal alveolar bone mass and clinical attachment level showed accurate relationship on digital subtraction radiographic assessment.…”

Section: Digital Subtraction Radiography (Dsr)mentioning

confidence: 99%

Recent advancements in dental digital radiography

Diwakar¹,

Kamakshi²

2015

JMRPS

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For more than a century, now radiographs have been taken using radiographic film. Digital imaging has been replacing traditional films in private practice, academic institutions in the last two decades. As use of digital radiography has become more common in the last decade with rapidly evolving changes in the way healthcare is administered, coupled with the amazing recent advances in imaging, many dental professionals are thinking of using digital system as a substitute to conventional film system. This has necessitated a review of the different technologies used for digital imaging in dentistry with broad overview of the principles in digital system, equipment, digital imaging receptors, procurement, enhancement process, transfer, and storage developments along with comparisons of film-based imaging, processing and image analysis.

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Impact of lossy compression on diagnostic accuracy of radiographs for periapical lesions

Cited by 25 publications

References 15 publications

Digital and Advanced Imaging in Endodontics: A Review

Digital and Advanced Imaging in Endodontics: A Review

The effects of compression on the image quality of digital panoramic radiographs

Recent advancements in dental digital radiography

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