Service of Oral and Maxillofacial Surgery, Department of Surgery, University Hospital and Faculty of Medicine of Geneva, 1211 Genève, Switzerland.
Eur J Radiol. 2012 Sep;81(9):2251-4. doi: 10.1016/j.ejrad.2011.06.024. Epub 2011 Jun 29.
To evaluate the reliability, accuracy and rapidity of a specific computational method for assessing the orbital floor fracture area on a CT scan.
A computer assessment of the area of the fracture, as well as that of the total orbital floor, was determined on CT scans taken from ten patients. The ratio of the fracture's area to the orbital floor area was also calculated. The test-retest precision of measurement calculations was estimated using the Intraclass Correlation Coefficient (ICC) and Dahlberg's formula to assess the agreement across observers and across measures. The time needed for the complete assessment was also evaluated.
The Intraclass Correlation Coefficient across observers was 0.92 [0.85;0.96], and the precision of the measures across observers was 4.9%, according to Dahlberg's formula .The mean time needed to make one measurement was 2 min and 39 s (range, 1 min and 32 s to 4 min and 37 s).
This study demonstrated that (1) the area of the orbital floor fracture can be rapidly and reliably assessed by using a specific computer system directly on CT scan images; (2) this method has the potential of being routinely used to standardize the post-traumatic evaluation of orbital fractures.
评估一种特定的计算方法在 CT 扫描上评估眶底骨折面积的可靠性、准确性和快速性。
对来自 10 名患者的 CT 扫描进行骨折面积以及整个眶底面积的计算机评估，并计算骨折面积与眶底面积的比值。使用组内相关系数（ICC）和 Dahlberg 公式评估观察者之间和测量之间的一致性来估计测量计算的复测精度。还评估了完成全面评估所需的时间。
观察者之间的组内相关系数为 0.92[0.85；0.96]，根据 Dahlberg 公式，观察者之间测量的精度为 4.9%。完成一次测量的平均时间为 2 分 39 秒（范围为 1 分 32 秒至 4 分 37 秒）。
这项研究表明：（1）通过使用特定的计算机系统直接在 CT 扫描图像上，可以快速可靠地评估眶底骨折的面积；（2）该方法有可能常规用于标准化眶骨骨折的创伤后评估。
