Color Doppler Twinkling Artifact Behind Hyperechoic Regions: Clinical and Experimental Research

目的：探讨强回声后方的“彩色多普勒快闪伪像”的产生机制和临床意义。方法：对44例患者46个超声发现的钙化灶和结石强回声以及8种浸在水中的实验模块行彩色多普勒检查，观察有无彩色多普勒快闪伪像的出现及其频度。结果：临床组46个强回声中有33个强回声后伴有彩色多普勒快闪伪像（71.7%）；实验组8种模块中，3种表面光滑者无彩色多普勒快闪伪像，5种表面不光滑者则伴有程度不同的快闪伪像。结论：彩色多普勒快闪伪像出现于表面不光滑的强回声界面之后，它有时会影响医师对病变的诊断，有时也可提供有用的信息。Objective:To evaluate the mechanism and the clinical value of the"color Doppler twinkling artifact" behind hyperechoic regions.Methods：In 44 patients with 46 hyperechoic regions (calcifications and calculi)seen at US, the presence of color signal was assessed behind hyperechoic areas. The twinkling artifact was also stimulated with eight strongly reflecting structures in still water.Results: The artifact was found behind 33 hyperechoic regions(71.7%).Vitro experiments showed that the twinkling artifact was present in five granular structures, whereas no color signal was noted in three smooth surfaces.Conclusions: The color Doppler twinkling artifact was present behind the hyperechoic regions with granular surfaces. Sometimes the presence of the twinkling artifact would influence the diagnoses, and sometimes it would give the sonographer more information.中文核心期刊要目总览(PKU)中国科学引文数据库(CSCD)0110-131