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Substantial CT radiation dose reduction does not affect the preference for CT over direct digital radiography to diagnose isolated zygomatic fractures - A study in human cadavers

Meijer, A., Rozema, R., Hartman, R., van der Duim, S., van Minnen, B., Krijnen, W. P. & de Groot, M., Nov-2016, In : Radiography. 22, 4, p. E228-E232 5 p.

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  • Substantial CT radiation dose reduction does not affect the preference for CT over direct digital radiography to diagnose isolated zygomatic fractures – A study in human cadavers

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DOI

Introduction: Zygomatic fractures can be diagnosed with either computed tomography (CT) or direct digital radiography (DR). The aim of the present study was to assess the effect of CT dose reduction on the preference for facial CT versus DR for accurate diagnosis of isolated zygomatic fractures.

Materials and methods: Eight zygomatic fractures were inflicted on four human cadavers with a free fall impactor technique. The cadavers were scanned using eight CT protocols, which were identical except for a systematic decrease in radiation dose per protocol, and one DR protocol. Single axial CT images were displayed alongside a DR image of the same fracture creating a total of 64 dual images for comparison. A total of 54 observers, including radiologists, radiographers and oral and maxillofacial surgeons, made a forced choice for either CT or DR.

Results: Forty out of 54 observers (74%) preferred CT over DR (all with P <0.05). Preference for CT was maintained even when radiation dose reduced from 147.4 mu Sv to 46.4 mu Sv (DR dose was 6.9 mu Sv). Only a single out of all raters preferred DR (P = 0.0003). The remaining 13 observers had no significant preference.

Conclusion: This study demonstrates that preference for axial CT over DR is not affected by substantial (similar to 70%) CT dose reduction for the assessment of zygomatico-orbital fractures. (C) 2016 The College of Radiographers. Published by Elsevier Ltd. All rights reserved.

Original languageEnglish
Pages (from-to)E228-E232
Number of pages5
JournalRadiography
Volume22
Issue number4
Publication statusPublished - Nov-2016

    Keywords

  • Zygomatic fractures, Diagnostic imaging, Radiography, X-ray computed tomography, Radiation dosage, FACIAL FRACTURES, 10-YEAR ANALYSIS, MAXILLOFACIAL TRAUMA, MIDFACIAL FRACTURES, COMPLEX FRACTURES, COMPLICATIONS, TOMOGRAPHY, PATIENT, TRENDS

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