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3127565 
Journal Article 
A comparable study of the diagnostic performance of orbital ultrasonography and cone-beam computed tomography in patients with suspected orbital floor fractures 
Johari, M; Ghavimi, MA; Mahmoudian, H; Javadrashid, R; Mirakhor Samani, S; Fouladi, DF 
2016 
Yes 
Dentomaxillofacial Radiology
ISSN: 0250-832X 
20150311 
English 
27074346 
OBJECTIVES: To compare the diagnostic performance of ultrasonography (US) and cone-beam computed tomography (CBCT) against computed tomography (CT) in detecting orbital floor fractures Methods: A total of 120 orbits with clinical suspicion of isolated orbital floor fractures underwent multislice CT scanning with coronal reconstruction, orbital US using a standard machine equipped with a 7-10 MHz linear transducer, and CBCT. Patients with severe head and face injuries were not included. The diagnostic performance of US and CBCT was reported assuming conventional CT as the imaging method of choice.

RESULTS: According to CT findings, fractures of the floor were present in 39 orbits. The sensitivity, specificity, positive predictive value and negative predictive value of US in detecting orbital floor fractures were 87.2%, 100%, 100% and 94.2%, respectively. The corresponding values for CBCT were 97.4%, 97.5%, 95.0%, and 98.8%, respectively. Areas under the receiver operator characteristics curves of orbital floor fracture detection were 0.94 for US and 0.98 for CBCT.

CONCLUSIONS: When conventional CT cannot be performed in patients with clinically suspected orbital floor fracture and no severe or complex head and face injuries, CBCT could be used in detecting fractures as a reliable surrogate. Because of a lower sensitivity of US, however, its use is limited in this regard.