Identification of Nasal Bone Fractures on Conventional Radiography and Facial CT: Comparison of the Diagnostic Accuracy in Different Imaging Modalities and Analysis of Interobserver Reliability

AUTHORS

Hye Jin Baek 1 , Dong Wook Kim 2 , * , Ji Hwa Ryu 1 , Yoo Jin Lee 2

1 Department of Radiology, Haeundae Paik Hospital, Inje University College of Medicine, Busan, South Korea

2 Department of Radiology, Busan Paik Hospital, Inje University College of Medicine, Busan, South Korea

How to Cite: Baek H J, Kim D W, Ryu J H, Lee Y J. Identification of Nasal Bone Fractures on Conventional Radiography and Facial CT: Comparison of the Diagnostic Accuracy in Different Imaging Modalities and Analysis of Interobserver Reliability, Iran J Radiol. Online ahead of Print ; 10(3):140-147. doi: 10.5812/iranjradiol.6353.

ARTICLE INFORMATION

Iranian Journal of Radiology: 10 (3); 140-147
Published Online: August 29, 2013
Article Type: Research Article
Received: May 14, 2012
Accepted: June 8, 2013
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Abstract

Background: There has been no study to compare the diagnostic accuracy of an experienced radiologist with a trainee in nasal bone fracture.

Objectives: To compare the diagnostic accuracy between conventional radiography and computed tomography (CT) for the identification of nasal bone fractures and to evaluate the interobserver reliability between a staff radiologist and a trainee.

Patients and Methods: A total of 108 patients who underwent conventional radiography and CT after acute nasal trauma were included in this retrospective study. Two readers, a staff radiologist and a second-year resident, independently assessed the results of the imaging studies.

Results: Of the 108 patients, the presence of a nasal bone fracture was confirmed in 88 (81.5%) patients. The number of non-depressed fractures was higher than the number of depressed fractures. In nine (10.2%) patients, nasal bone fractures were only identified on conventional radiography, including three depressed and six non-depressed fractures. CT was more accurate as compared to conventional radiography for the identification of nasal bone fractures as determined by both readers (P <0.05), all diagnostic indices of an experienced radiologist were similar to or higher than those of a trainee, and ? statistics showed moderate agreement between the two diagnostic tools for both readers. There was no statistical difference in the assessment of interobserver reliability for both imaging modalities in the identification of nasal bone fractures.

Conclusion: For the identification of nasal bone fractures, CT was significantly superior to conventional radiography. Although a staff radiologist showed better values in the identification of nasal bone fracture and differentiation between depressed and non-depressed fractures than a trainee, there was no statistically significant difference in the interpretation of conventional radiography and CT between a radiologist and a trainee.

Keywords

Nasal Bone, Fractures, Bone Radiography

© 2013, Author(s). This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/) which permits copy and redistribute the material just in noncommercial usages, provided the original work is properly cited.

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