Intra-and interobserver variability in ultrasound measurements of abdominal aortic diameter. The Tromso study
Intra-and interobserver variability in ultrasound measurements of abdominal aortic diameter. The Tromso study
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DOI：
10.1016/s1078-5884(98)80109-3
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发表时间：
1998-06-01
影响因子：
5.7
通讯作者：
Bjork, L
中科院分区：
文献类型：
--
作者：
Singh, K;Bonaa, KH;Bjork, L
目的：评估腹主动脉不同水平超声测量的变异性。设计：作为腹主动脉瘤人群健康筛查一部分的再现性研究。材料和方法：1994/1995 年，共有 6892 名受试者接受了腹主动脉超声检查。通过邀请 112 名随机选择的参与者在第一次扫描后 3 周内进行第二次超声扫描，在调查期开始和结束时评估了测量结果的变异性。这些受试者由一位经验丰富的放射科医生和三名接受过短期超声检查课程的超声技师进行检查。所有检查员对彼此的结果均不知情。结果：调查期开始和结束时的变异性相似。对于所有超声医师在测量最大肾下主动脉直径时，观察者内和观察者间的变异性均小于 4 mm，并且前后和横向平面的测量变异性相似。肾脏水平测量的变异性大于主动脉分叉水平测量的变异性。放射科医师的变异性低于其他超声医师。结论：最大直径的超声测量可以获得高精度。如果经过适当的培训和监督，缺乏经验的超声检查人员可能会取得可接受的表现。
Objectives: To assess the variability of ultrasonographic measurements at different levels of the abdominal aorta.Design: Reproducibility study as part of a population health screening for abdominal aortic aneurysm.Materials ann methods: In 1994/1995 a total of 6892 subjects underwent ultrasound examination of the abdominal aorta. Variability of measurements was assessed in the beginning and end of the survey period by inviting 112 randomly selected participants to a second ultrasound scan within 3 weeks of the first scan. The subjects were examined by an experienced radiologist and three sonographers who had been given a short course in ultrasonography. All examiners were blinded to each other's results.Results: Variability was similar in the beginning and end of the survey period. Both the intra- and interobserver variability were less than 4 mm for all sonographers in measurements of maximal infrarenal aortic diameter, and variability was similar for measurements in the anterior-posterior and transverse plane. Variability was greater for measurements at the renal level than aortic bifurcation level. The radiologist had lower variability than the other sonographers.Conclusion: Ultrasound measurements of the maximal diameter can be obtained with a high degree of accuracy. Inexperienced sonographers may achieve acceptable performance given appropriate training and surveillance.