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Article: In vitro calibration and validation of a digital subtraction radiography system using scanned images

TitleIn vitro calibration and validation of a digital subtraction radiography system using scanned images
Authors
KeywordsComputer-assisted densitometric image analysis
Digital subtraction radiography
Radiographs
Scanned images
Issue Date2003
PublisherBlackwell Munksgaard. The Journal's web site is located at http://www.blackwellpublishing.com/journals/CPE
Citation
Journal Of Clinical Periodontology, 2003, v. 30 n. 2, p. 114-118 How to Cite?
AbstractObjectives: To calibrate and validate a digital subtraction radiography system using scanned images for quantification of alveolar bone changes by means of computer-assisted densitometric image analysis (CADIA) in vitro. Materials and Methods: Noise levels were determined using 10 standardized periapical radiographs of the same lower molar region in a human dry skull. For validation of the system, radiographs were taken before and after bovine bone particles in measures with increments of 2 mg weighing from 2 to 20 mg were added into each socket of three dry skulls. Radiographs were developed and scanned into a computer with a flatbed scanner. After digitization, the images were subjected to alignment, normalization and subtraction. Appropriate regions of interest (ROIs) were selected and their CADIA values were calculated for the determination of noise levels, and correlations between the CADIA values and the actual bone mass were performed. Results: When the threshold value was 7, the percentage of pixels deviating from the set threshold value was small (0-11.3%). There were statistically significant correlations between the actual bone mass and the CADIA value for anterior sockets (p<0.001, r 2 = 0.89) and posterior sockets (p<0.001, r 2 = 0.9). For pooled data of both anterior and posterior sockets, the correlation was also statistically significant (p<0.001, r 2 = 0.88). Conclusions: A high and statistically significant correlation between the actual bone mass and CADIA value was obtained, which suggests that the system could be suitable for the detection of small alveolar bone changes.
Persistent Identifierhttp://hdl.handle.net/10722/66907
ISSN
2015 Impact Factor: 3.915
2015 SCImago Journal Rankings: 1.848
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorWoo, BMSen_HK
dc.contributor.authorZee, KYen_HK
dc.contributor.authorChan, FHYen_HK
dc.contributor.authorCorbet, EFen_HK
dc.date.accessioned2010-09-06T05:50:21Z-
dc.date.available2010-09-06T05:50:21Z-
dc.date.issued2003en_HK
dc.identifier.citationJournal Of Clinical Periodontology, 2003, v. 30 n. 2, p. 114-118en_HK
dc.identifier.issn0303-6979en_HK
dc.identifier.urihttp://hdl.handle.net/10722/66907-
dc.description.abstractObjectives: To calibrate and validate a digital subtraction radiography system using scanned images for quantification of alveolar bone changes by means of computer-assisted densitometric image analysis (CADIA) in vitro. Materials and Methods: Noise levels were determined using 10 standardized periapical radiographs of the same lower molar region in a human dry skull. For validation of the system, radiographs were taken before and after bovine bone particles in measures with increments of 2 mg weighing from 2 to 20 mg were added into each socket of three dry skulls. Radiographs were developed and scanned into a computer with a flatbed scanner. After digitization, the images were subjected to alignment, normalization and subtraction. Appropriate regions of interest (ROIs) were selected and their CADIA values were calculated for the determination of noise levels, and correlations between the CADIA values and the actual bone mass were performed. Results: When the threshold value was 7, the percentage of pixels deviating from the set threshold value was small (0-11.3%). There were statistically significant correlations between the actual bone mass and the CADIA value for anterior sockets (p<0.001, r 2 = 0.89) and posterior sockets (p<0.001, r 2 = 0.9). For pooled data of both anterior and posterior sockets, the correlation was also statistically significant (p<0.001, r 2 = 0.88). Conclusions: A high and statistically significant correlation between the actual bone mass and CADIA value was obtained, which suggests that the system could be suitable for the detection of small alveolar bone changes.en_HK
dc.languageengen_HK
dc.publisherBlackwell Munksgaard. The Journal's web site is located at http://www.blackwellpublishing.com/journals/CPEen_HK
dc.relation.ispartofJournal of Clinical Periodontologyen_HK
dc.subjectComputer-assisted densitometric image analysisen_HK
dc.subjectDigital subtraction radiographyen_HK
dc.subjectRadiographsen_HK
dc.subjectScanned imagesen_HK
dc.titleIn vitro calibration and validation of a digital subtraction radiography system using scanned imagesen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0303-6979&volume=30&spage=114&epage=118&date=2003&atitle=In+vitro+calibration+and+validation+of+a+digital+subtraction+radiography+system+using+scanned+imagesen_HK
dc.identifier.emailCorbet, EF:efcorbet@hku.hken_HK
dc.identifier.authorityCorbet, EF=rp00005en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1034/j.1600-051X.2003.00236.xen_HK
dc.identifier.scopuseid_2-s2.0-0037639822en_HK
dc.identifier.hkuros80778en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0037639822&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume30en_HK
dc.identifier.issue2en_HK
dc.identifier.spage114en_HK
dc.identifier.epage118en_HK
dc.identifier.isiWOS:000181371200004-
dc.publisher.placeDenmarken_HK
dc.identifier.scopusauthoridWoo, BMS=8097459600en_HK
dc.identifier.scopusauthoridZee, KY=6603722366en_HK
dc.identifier.scopusauthoridChan, FHY=7202586429en_HK
dc.identifier.scopusauthoridCorbet, EF=35609873200en_HK

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