DMFR
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
This Article
Right arrow Figures Only
Right arrow Full Text
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Mora, M.
Right arrow Articles by Rivera, E.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Mora, M.
Right arrow Articles by Rivera, E.
Dentomaxillofacial Radiology (2007) 36, 382-386
© 2007 British Institute of Radiology
doi: 10.1259/dmfr/25073870

RESEARCH

Effect of the number of basis images on the detection of longitudinal tooth fractures using local computed tomography

MA Mora1, A Mol*,1, DA Tyndall1 and EM Rivera2

1 Department of Diagnostic Sciences and General Dentistry, University of North Carolina at Chapel Hill, North Carolina, USA; 2 Department of Endodontics, University of North Carolina at Chapel Hill, North Carolina, USA

* Correspondence to: Dr André Mol, Department of Diagnostic Sciences and General Dentistry, UNC School of Dentistry, CB 7450, Chapel Hill, NC 27599-7450, USA; Email: mola{at}dentistry.unc.edu

Received 25 June 2006; revised 6 December 2006; accepted 19 December 2006

Objectives: To determine the effect of the number of basis images on the accuracy of local CT (LCT) in detecting longitudinal fractures and test the accuracy of terminal point assessment.

Methods: Longitudinal fractures were induced in 30 of 60 posterior teeth. LCT volumes were generated from 180, 60, 36 and 20 basis images. Ten observers determined the presence of a fracture and its terminal point. Receiver operating characteristic (ROC) analysis was used to quantify detection accuracy, and kappa statistics were used to quantify the concordance between actual and observed terminal point locations.

Results: Az-values were 0.91, 0.84, 0.74, 0.57 and 0.70 for LCT180, LCT60, LCT36, LCT20 and conventional radiography, respectively (ANOVA: P<0.0001). LCT180 and LCT60 outperformed the other modalities. The respective kappa values for terminal point assessment were 0.52, 0.40, 0.37, 0.16 and 0.32 (ANOVA: P=0.00). LCT180 and LCT60 provided better agreement.

Conclusions: LCT maintained its efficacy for detecting longitudinal fractures with 60 instead of 180 basis images. Agreement between actual and observed terminal point locations was moderate for LCT60 and LCT180.

Keywords: radiography, dental;; tomography, X-ray computed;; tooth fractures






HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
BJR DMFR IMAGING ALL BIR JOURNALS
Copyright © 2007 by the British Institute of Radiology.