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Article: Effects of the automatic exposure compensation on the proximal caries diagnosis

TitleEffects of the automatic exposure compensation on the proximal caries diagnosis
Authors
Issue Date2005
PublisherBritish Institute of Radiology. The Journal's web site is located at http://dmfr.birjournals.org/
Citation
Dentomaxillofacial Radiology, 2005, v. 34 n. 3, p. 140-144 How to Cite?
AbstractObjective: To elucidate the effect of automatic exposure compensation (AEC) on the diagnostic accuracy of proximal caries by comparing several digital intraoral imaging systems with a film. Materials and methods: Twenty-seven extracted teeth served as proximal caries samples. Three digital radiographic systems; the Compuray, the Dixel, and the Sens-A-Ray without scintillator layer, and Kodak Ekta-speed Plus films were used as recording media. Radiographs of the teeth samples were obtained with each recording medium under seven to eight different exposures including the optimum level. Six oral radiologists evaluated the possibility of proximal caries with the five-grade-confidence-scale. On digital radiographs, image manipulations were allowed after the initial assessment. Receiver operating characteristic (ROC) curves were obtained at each exposure in each recording medium. The area under the ROC curve (Az) was used as the representative value of diagnostic accuracy. Diagnostic accuracy (DA) curves were obtained by plotting averaged Az values from all observers as a function of incident exposure in each system. Results: The effect of exposure variation on the DA was slight in the film while it was significantly larger in the digital systems without AEC. Among digital systems, the effect of exposure variation was smaller in the system with AEC than those without AEC. There was no significant effect on the diagnostic accuracy even if digital image manipulation was employed. Conclusion: AEC minimizes the decrease of DA due to inadequate exposures. Since it compensates for the narrow exposure range in the digital intraoral sensor systems, the system with AEC may be preferable for the clinical diagnostic tasks. © 2005 The British Institute of Radiology.
Persistent Identifierhttp://hdl.handle.net/10722/154345
ISSN
2015 Impact Factor: 1.919
2015 SCImago Journal Rankings: 0.897
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorYoshiura, Ken_US
dc.contributor.authorNakayama, Een_US
dc.contributor.authorShimizu, Men_US
dc.contributor.authorGoto, TKen_US
dc.contributor.authorChikui, Ten_US
dc.contributor.authorKawazu, Ten_US
dc.contributor.authorOkamura, Ken_US
dc.date.accessioned2012-08-08T08:24:45Z-
dc.date.available2012-08-08T08:24:45Z-
dc.date.issued2005en_US
dc.identifier.citationDentomaxillofacial Radiology, 2005, v. 34 n. 3, p. 140-144en_US
dc.identifier.issn0250-832Xen_US
dc.identifier.urihttp://hdl.handle.net/10722/154345-
dc.description.abstractObjective: To elucidate the effect of automatic exposure compensation (AEC) on the diagnostic accuracy of proximal caries by comparing several digital intraoral imaging systems with a film. Materials and methods: Twenty-seven extracted teeth served as proximal caries samples. Three digital radiographic systems; the Compuray, the Dixel, and the Sens-A-Ray without scintillator layer, and Kodak Ekta-speed Plus films were used as recording media. Radiographs of the teeth samples were obtained with each recording medium under seven to eight different exposures including the optimum level. Six oral radiologists evaluated the possibility of proximal caries with the five-grade-confidence-scale. On digital radiographs, image manipulations were allowed after the initial assessment. Receiver operating characteristic (ROC) curves were obtained at each exposure in each recording medium. The area under the ROC curve (Az) was used as the representative value of diagnostic accuracy. Diagnostic accuracy (DA) curves were obtained by plotting averaged Az values from all observers as a function of incident exposure in each system. Results: The effect of exposure variation on the DA was slight in the film while it was significantly larger in the digital systems without AEC. Among digital systems, the effect of exposure variation was smaller in the system with AEC than those without AEC. There was no significant effect on the diagnostic accuracy even if digital image manipulation was employed. Conclusion: AEC minimizes the decrease of DA due to inadequate exposures. Since it compensates for the narrow exposure range in the digital intraoral sensor systems, the system with AEC may be preferable for the clinical diagnostic tasks. © 2005 The British Institute of Radiology.en_US
dc.languageengen_US
dc.publisherBritish Institute of Radiology. The Journal's web site is located at http://dmfr.birjournals.org/en_US
dc.relation.ispartofDentomaxillofacial Radiologyen_US
dc.subject.meshAdolescenten_US
dc.subject.meshDental Caries - Radiographyen_US
dc.subject.meshDental Enamel - Radiographyen_US
dc.subject.meshHumansen_US
dc.subject.meshImage Processing, Computer-Assisted - Methodsen_US
dc.subject.meshObserver Variationen_US
dc.subject.meshRoc Curveen_US
dc.subject.meshRadiation Dosageen_US
dc.subject.meshRadiographic Image Enhancement - Methodsen_US
dc.subject.meshRadiography, Dental, Digital - Methods - Statistics & Numerical Dataen_US
dc.subject.meshTime Factorsen_US
dc.subject.meshX-Ray Filmen_US
dc.titleEffects of the automatic exposure compensation on the proximal caries diagnosisen_US
dc.typeArticleen_US
dc.identifier.emailGoto, TK:gototk@hku.hken_US
dc.identifier.authorityGoto, TK=rp01434en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1259/dmfr/88681265en_US
dc.identifier.pmid15897283-
dc.identifier.scopuseid_2-s2.0-22044449950en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-22044449950&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume34en_US
dc.identifier.issue3en_US
dc.identifier.spage140en_US
dc.identifier.epage144en_US
dc.identifier.isiWOS:000230206700002-
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridYoshiura, K=7006527913en_US
dc.identifier.scopusauthoridNakayama, E=7102521905en_US
dc.identifier.scopusauthoridShimizu, M=7404138590en_US
dc.identifier.scopusauthoridGoto, TK=7403938313en_US
dc.identifier.scopusauthoridChikui, T=35548505400en_US
dc.identifier.scopusauthoridKawazu, T=7003856408en_US
dc.identifier.scopusauthoridOkamura, K=7402447805en_US

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