Sparacia Gianvincenzo, Iaia Alberto
1 DIBMEF-Sezione di Scienze Radiologiche, Università degli Studi di Palermo, Italy.
2 Neuroradiology Section, Christiana Care Health System, USA.
Neuroradiol J. 2017 Jun;30(3):216-221. doi: 10.1177/1971400916689484. Epub 2017 Jan 1.
Purpose The purpose of this article is to assess the diagnostic performance of computed tomography (CT) reformatted images for detection of superior semicircular canal (SSC) dehiscence. Material and methods Forty-two patients, with sound- and/or pressure-induced vestibular symptoms, and 42 control participants underwent helical CT examination with a highly collimated beam (0.5 mm). Reformatted images of the vestibular labyrinth were obtained in the standard axial and coronal planes (group A images), and in a plane parallel and perpendicular to the SSC (group B images). Diagnostic performance obtained by evaluating the group A images alone and the group B images alone was analyzed by using the area under the receiver operating characteristic curve (AUC). Results The diagnostic performance of group A images was AUC = 0.929 with an overall accuracy of 92.9%. The diagnostic performance of group B images was AUC = 0.988 with an overall accuracy of 98.8%. The evaluation of group B images alone showed an improved diagnostic performance over the group A images alone. Conclusion Thin-section 0.5-mm collimation CT with reformatted images oriented in the plane parallel and perpendicular to the SSC improves diagnostic accuracy in assessing for SSC dehiscence in comparison to CT images with reconstructions limited to traditional axial and coronal planes.
目的 本文旨在评估计算机断层扫描（CT）重组图像检测上半规管（SSC）裂开的诊断性能。材料与方法 42例有声音和/或压力诱发前庭症状的患者以及42名对照参与者接受了高准直束（0.5毫米）螺旋CT检查。在前庭迷路的标准轴向和冠状平面（A组图像）以及与SSC平行和垂直的平面（B组图像）上获取重组图像。通过使用受试者操作特征曲线（AUC）下的面积分析单独评估A组图像和单独评估B组图像所获得的诊断性能。结果 A组图像的诊断性能为AUC = 0.929，总体准确率为92.9%。B组图像的诊断性能为AUC = 0.988，总体准确率为98.8%。单独评估B组图像显示出比单独评估A组图像更好的诊断性能。结论 与仅限于传统轴向和冠状平面重建的CT图像相比，采用0.5毫米准直的薄层CT及与SSC平行和垂直平面的重组图像可提高评估SSC裂开的诊断准确性。
