Reduction in size of digital images: does it lead to less detectability or loss of diagnostic information?

Versteeg, C H; Sanderink, G.C.H.; Lobach, S R; Stelt, P.F. van der

doi:10.1038/sj.dmfr.4600329

Cited by 18 publications

(12 citation statements)

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“…In one study, image reduction was shown to result in a loss of diagnostic information used to monitor endodontic file-length (24). In one study, image reduction was shown to result in a loss of diagnostic information used to monitor endodontic file-length (24).…”

Section: Discussionmentioning

confidence: 99%

The effects of digital image enhancement on the detection of vertical root fracture

Kamburoğlu¹,

Murat

Pehlivan

2010

Dental Traumatology

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Section: Discussionmentioning

confidence: 99%

The effects of digital image enhancement on the detection of vertical root fracture

Kamburoğlu¹,

Murat

Pehlivan

2010

Dental Traumatology

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“…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). Radiographs processed to correct for attenuation differences and visual perception have been demonstrated to facilitate determination of the length of thin endodontic files.…”

Section: Image Compressionmentioning

confidence: 98%

Digital and Advanced Imaging in Endodontics: A Review

Nair

2007

Journal of Endodontics

246

191

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“…More recently, it was argued that some diagnostic systems have proprietary preprocessing filters and subsequent alteration in brightness and contrast may therefore be detrimental to the diagnostic process [Tyndall et al, 1998]. Reduction in size of digital images with the vast majority of currently available image processing software may cause less detectability as well as loss of diagnostic information [Versteeg et al, 1998;Molteni, 1998]. It was argued in a recent study that the borderline between useful image improvement and misleading manipulation should be considered [Visser and Krüger, 1996].…”

Section: Discussionmentioning

confidence: 99%

Approximal Caries Depth Assessment with Storage Phosphor versus Film Radiography

2000

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Objectives: To study whether caries–specific enhancement of storage phosphor images might improve the observer performance of approximal caries depth assessments compared with film radiography. Materials and Methods: 120 exposures were made of 120 extracted human teeth. To obtain geometrically identical images, Ektaspeed Plus films and storage phosphor plates were exposed simultaneously. The imaging plates were scanned in a Digora^® scanner and the files transferred to a different platform for image enhancement. Nine observers viewed films and storage phosphor images without provisions for adjustment of image intensity and contrast. For each imaging modality, 240 approximal surfaces were rated for caries on a 5–point confidence scale. Definite and probable caries lesions were also rated for lesion depth, and all ratings were compared with the histological state. Diagnostic accuracy was expressed as the area under the ROC curve (A_z value). Paired t tests were used to compare the imaging modalities for diagnostic accuracy and F tests to compare observer variances. Results: Enhanced storage phosphor images demonstrated significantly higher mean A_z values than film (p = 0.0066). Significantly higher mean A_z values were demonstrated in the outer half of enamel (p = 0.01), but no significant differences were found between the modalities for caries lesions penetrating beyond the outer half of the enamel. The number of correctly diagnosed true–positive surfaces with caries in outer enamel was significantly higher with storage phosphor images than with film (p = 0.00014). False–positive surfaces were most frequently registered in the outer enamel with both modalities, but in this region the number of false–positive surfaces was significantly higher with storage phosphor images than with film (p = 0.0038). Pooled sensitivity and specificity values were 0.48/0.94 and 0.61/0.86 for film and storage phosphor images, respectively. The interobserver variability was significantly lower for storage phosphor images than for film. Conclusion: Enhancement of storage phosphor images with a caries–specific procedure significantly improved the accuracy of caries depth assessments in the outer half of the enamel compared with film radiography and reduced observer variability.

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Reduction in size of digital images: does it lead to less detectability or loss of diagnostic information?

Cited by 18 publications

References 0 publications

The effects of digital image enhancement on the detection of vertical root fracture

The effects of digital image enhancement on the detection of vertical root fracture

Digital and Advanced Imaging in Endodontics: A Review

Approximal Caries Depth Assessment with Storage Phosphor versus Film Radiography

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