Daffner R H, Gehweiler J A
AJR Am J Roentgenol. 1981 Oct;137(4):737-9. doi: 10.2214/ajr.137.4.737.
A lucency in the intervertebral disc space at the superior margin is a normal variant related to Mach band phenomenon. This may easily be confused with a true vacuum sign in intervertebral disc injury. Patients with the pseudovacuum have no associated radiographic findings to suggest injury about the suspected disc space. A review of a group of normal lateral cervical vertebral films showed the phenomenon to occur in 65% of adults and 50% in children.
椎间盘间隙上缘的透亮区是与马赫带现象相关的正常变异。这可能很容易与椎间盘损伤中的真正真空征相混淆。假性真空患者没有相关的影像学表现提示可疑椎间盘间隙周围有损伤。一组正常颈椎侧位片的回顾显示，该现象在65%的成年人和50%的儿童中出现。
