后颅窝测量。I. 后颅窝的正常大小。

Posterior fossa measurements. I. The normal size of the posterior fossa.

作者信息

Krogness K G

出版信息

Pediatr Radiol. 1978 Feb 28;6(4):193-7. doi: 10.1007/BF00975535.

Abstract

The posterior fossa area was defined as that situated below Twining's line while the one above was called the supratentorial area. A ratio has been calculated: Posterior fossa area/Supratentorial area X 100 = posterior fossa ratio. Above 7 years this was (mean) 16.5% +/- 2 and below 7 years 14.0% +/- 4, with the ranges (13.2-20.2) and (9.0 - 19.4), respectively. When the ratio falls below 13% and 9% respectively, this implies therefore a malformation of the posterior fossa, i.e. too flat a space. Two formulas for calculation of the areas mentioned as well as two other ratios are also introduced.

摘要

后颅窝区域被定义为位于Twining线下方的区域，而其上方的区域则被称为幕上区域。已计算出一个比值：后颅窝面积/幕上面积×100 = 后颅窝比值。7岁以上儿童该比值（均值）为16.5%±2，7岁以下儿童为14.0%±4，范围分别为（13.2 - 20.2）和（9.0 - 19.4）。因此，当该比值分别低于13%和9%时，意味着后颅窝畸形，即空间过于扁平。还介绍了上述面积计算的两个公式以及另外两个比值。