Consistency analysis of aneurysm morphological parameters measurements by different experienced physicians / 中国脑血管病杂志

ABSTRACT

Objective: To investigate the consistency among different experienced physicians in the measurement of morphological parameters of intracranial aneurysms. Methods: From April 1,2017 to April 30,2017, DSA data of 27 aneurysms from 24 consecutive patients in Department of Neurosurgery, Xuanwu Hospital, Capital Medical University were retrospectively collected. Morphological measurement of these aneurysms was performed after three-dimensional reconstruction (morphological parametersdiameter, height,width,neck widui and aneurysm inflow-angle).The measurement physicians were three interventional neuroradiologists who were engaged in cerebrovascular diseases for less than 5 years (3 years),5 to 10 years (9 years) and more than 10 years (13 years),and they were blinded to each other. The intraclass correlation coefficient (ICC) was used to compare the consistency of measurements among the three physicians,and the Kruskal-Wallis rank sum test was used to compare the statistical differences. Results: The ICC values were consistent in morphological parameters of aneurysm diameter,width,height and neck width among the three different experienced physicians (ICC = 0. 936 -0. 995). However, in terms of the inflowangle measurement, there was moderately consistent (ICC = 0. 561) between the physician within 5 years and the one experienced 5 to 10 years, and both of them were poorly consistent with the physician over 10years (ICC =0.465 and ICC = 0. 284, respectively). There were no statistically significant differences among the three different experienced physicians in measuring morphological parameters of length (diameter, height,width and neck width;H values were 0.881,0.743,1.651 and 0. 160;all P value >0.05),but the difference in inflow-angle was statistically significant (H = 1.391, P =0.006). Conclusion Length parameters have good consistency among different experienced physicians in clinical measurement, but the measurement of angle parameters has poor consistency and is not reliable enough.