动脉瘤样骨囊肿─CT和MR图像上的再认识

Aneurysmal Bone Cyst-Recognition on CT and MRI

目的：评价ＣＴ和ＭＲＩ图像上液－液平面征象对诊断动脉瘤样骨囊肿（ＡＢＣ）的价值。材料和方法：回顾性分析１１例经病理证实的ＡＢＣ的平片、ＣＴ和ＭＲ表现，并用双盲法测试单纯平片和综合影像分析（平片、ＣＴ、ＭＲＩ）的诊断符合率。结果：１．单纯平片诊断符合率低于综合影像诊断；２．ＣＴ和ＭＲ有助于显示病变的范围、与周围组织的关系和病灶内的特征：３．在ＣＴ和ＭＲＩ上ＡＢＣ可见到液－液平面征。结论：ＣＴ和ＭＲＩ上的液－液平面征是ＡＢＣ较特征性的征象。综合性影像检查能提高ＡＢＣ的诊断准确率。

Purpose: To assess the value of a fluid-fluid level on CT and MRI in diagnosing Aneurysmal Bone Cyst(ABC).Materials and Methods:Among eleven cases of ABC,the appearances on plain radiography,CT and MRI were studied retrospectively,which were verified pathologically. With double-blind method,the accurate rate were compared by only plain film with by plain film, CT and MRI. Results: 1. CT and MRI were superior to plain radiography in diagnosing ABC. 2.CT and MRI can give more information in revealing the feature and extension of bone lesion. 3.Among ABC, CT and MRI can detect a characteristic sign- -a fluid-fluid level. Conclusion: A Fluid-fluid level on CT and MRI was a specific appearance among ABC,It's helpful in diagnosing ABC combining with plain film,CT and MRI.