File Download
There are no files associated with this item.
Links for fulltext
(May Require Subscription)
- Publisher Website: 10.1034/j.1600-051X.2003.00236.x
- Scopus: eid_2-s2.0-0037639822
- WOS: WOS:000181371200004
- Find via
Supplementary
- Citations:
- Appears in Collections:
Article: In vitro calibration and validation of a digital subtraction radiography system using scanned images
Title | In vitro calibration and validation of a digital subtraction radiography system using scanned images |
---|---|
Authors | |
Keywords | Computer-assisted densitometric image analysis Digital subtraction radiography Radiographs Scanned images |
Issue Date | 2003 |
Publisher | Blackwell 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? |
Abstract | Objectives: 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 Identifier | http://hdl.handle.net/10722/66907 |
ISSN | 2023 Impact Factor: 5.8 2023 SCImago Journal Rankings: 2.249 |
ISI Accession Number ID | |
References |
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Woo, BMS | en_HK |
dc.contributor.author | Zee, KY | en_HK |
dc.contributor.author | Chan, FHY | en_HK |
dc.contributor.author | Corbet, EF | en_HK |
dc.date.accessioned | 2010-09-06T05:50:21Z | - |
dc.date.available | 2010-09-06T05:50:21Z | - |
dc.date.issued | 2003 | en_HK |
dc.identifier.citation | Journal Of Clinical Periodontology, 2003, v. 30 n. 2, p. 114-118 | en_HK |
dc.identifier.issn | 0303-6979 | en_HK |
dc.identifier.uri | http://hdl.handle.net/10722/66907 | - |
dc.description.abstract | Objectives: 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.language | eng | en_HK |
dc.publisher | Blackwell Munksgaard. The Journal's web site is located at http://www.blackwellpublishing.com/journals/CPE | en_HK |
dc.relation.ispartof | Journal of Clinical Periodontology | en_HK |
dc.subject | Computer-assisted densitometric image analysis | en_HK |
dc.subject | Digital subtraction radiography | en_HK |
dc.subject | Radiographs | en_HK |
dc.subject | Scanned images | en_HK |
dc.title | In vitro calibration and validation of a digital subtraction radiography system using scanned images | en_HK |
dc.type | Article | en_HK |
dc.identifier.openurl | http://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+images | en_HK |
dc.identifier.email | Corbet, EF:efcorbet@hku.hk | en_HK |
dc.identifier.authority | Corbet, EF=rp00005 | en_HK |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1034/j.1600-051X.2003.00236.x | en_HK |
dc.identifier.scopus | eid_2-s2.0-0037639822 | en_HK |
dc.identifier.hkuros | 80778 | en_HK |
dc.relation.references | http://www.scopus.com/mlt/select.url?eid=2-s2.0-0037639822&selection=ref&src=s&origin=recordpage | en_HK |
dc.identifier.volume | 30 | en_HK |
dc.identifier.issue | 2 | en_HK |
dc.identifier.spage | 114 | en_HK |
dc.identifier.epage | 118 | en_HK |
dc.identifier.isi | WOS:000181371200004 | - |
dc.publisher.place | Denmark | en_HK |
dc.identifier.scopusauthorid | Woo, BMS=8097459600 | en_HK |
dc.identifier.scopusauthorid | Zee, KY=6603722366 | en_HK |
dc.identifier.scopusauthorid | Chan, FHY=7202586429 | en_HK |
dc.identifier.scopusauthorid | Corbet, EF=35609873200 | en_HK |
dc.identifier.issnl | 0303-6979 | - |