肝脏扫查中斜切“伪像”的成因及对策

Oblique scan "artifact" in liver ultrasonography: sources and countermeasures

目的探讨将肝外毗邻脏器病变误诊为肝内病变的原因及防治措施。方法采取前瞻性的研究方法,对16例相关病例进行详细的超声检查(包括多切面比对、动态观察并结合呼吸运动)和随访。结果斜切时肿块完全映入肝内是导致误诊的原因,而纵切或横切可发现肿块与肝脏的界线,动态观察并结合呼吸运动,可进一步明确肿块与肝脏的关系。结论斜切“伪像”实际上是一种错觉。多切面扫查、动态观察并结合呼吸运动是防止斜切“伪像”,减少并杜绝此类误诊的关键。

Objective To investigate the sources and countermeasures of extra - liver lesion misdiagnosed as intm - liver one. Methods A total of 16 correlative cases were examined in detail using prospective method, including of multi - scan comparison and analysis,dynamic observation combined with respiratory movements and follow- up. Results During oblique scan, the lesion would mapped into the liver （called oblique scan ＂artifact＂）, it would be the source of misdiagnosis. But during longitudinal or traverse scan, we would found the margin between the lesion and the liver, and dynamic observation combined with respiratory movements would further identify the relationship of the lesion and the liver. Conclusions Oblique scan ＂artifact＂ is actually a delusion, and Multi - scan comparison and analysis, dynamic observation combined with respiratory movements are important to prevent it.