Rafi Aisha, Sayeed Sana, Anwar Muhammad Idrees
Dr. Aisha Rafi, FCPS. Department of Anatomy, Shifa College of Medicine, Shifa Tameer-e-Millat University, Islamabad, Pakistan.
Dr. Sana Sayeed, FCPS. Department of Radiology, Shifa College of Medicine, Shifa Tameer-e-Millat University, Islamabad, Pakistan.
Pak J Med Sci. 2020 Mar-Apr;36(3):310-315. doi: 10.12669/pjms.36.3.2003.
To determine the morphological variations and location of pterion in Pakistani male population.
This retrospective observational study was carried out in the Department of Radiology, Shifa International Hospital from December 2018 to June 2019. The sample size was calculated by Open Epi web-based calculator. Fifty-three cranial CT scans with slice thickness of 0.5mm; consecutive scans of males were randomly selected. The patients with no craniofacial fracture and ages from 25 to 45 years were included. The dataset was obtained from Toshiba Aquilion One, 360-slice MDCT. The images were imported into the imaging software PACS (WFM), and analyzed in maximum intensity projection mode with three dimensional multiplanar reconstruction viewers. Measurements were taken in lateral projections of skull in Frankfurt plane, as horizontal and vertical distance from the posterolateral margin of frontozygomatic suture to center of pterion. Vertical distance from the superior border of zygomaticotemporal arch to the center of pterion. The morphological types were also recognized.
The type of pterion on right side was 94.3% sphenoparietal 5.6% epipteric whereas left side was (90.5%) sphenoparietal (3.7%) epipteric, (3.7%) stellate type, (1.8%) frontotemporal type. The mean horizontal and vertical frontozygomatic measurements on right side were 2.23 ± 0.22cm and 1.25±0.219 cm respectively. The same measurements on the left side were 2.27-±0.25 cm and 1.226-±0.22 cm respectively. The mean zygomaticotemporal measurements on the right and left sides were 3.45 ±0.29cm and 3.44 ±0.25 cm respectively. The mean distance on right and left side of skull was statistically insignificant.
The study provides useful data for position and location of pterion for safe neurosurgical procedures via pterion. Moreover, the knowledge about different morphological types of pterion help the radiologist to differentiate between a fracture line and normal morphological variety.
确定巴基斯坦男性人群中翼点的形态变异及位置。
本回顾性观察研究于2018年12月至2019年6月在希法国际医院放射科开展。样本量通过基于网络的Open Epi计算器计算得出。随机选取53例层厚为0.5mm的男性颅脑CT扫描图像；选取连续扫描的图像。纳入无颅面骨折且年龄在25至45岁之间的患者。数据集来自东芝Aquilion One 360层MDCT。将图像导入成像软件PACS（WFM），并在最大强度投影模式下使用三维多平面重建观察器进行分析。在法兰克福平面的颅骨侧位投影中进行测量，即从额颧缝后外侧边缘到翼点中心的水平和垂直距离。从颧颞弓上缘到翼点中心的垂直距离。同时识别形态类型。
右侧翼点类型中蝶顶型占94.3%，翼上型占5.6%；而左侧蝶顶型占90.5%，翼上型占3.7%，星型占3.7%，额颞型占1.8%。右侧额颧的平均水平和垂直测量值分别为2.23±0.22cm和1.25±0.219cm。左侧相同测量值分别为2.27±0.25cm和1.226±0.22cm。左右两侧颧颞的平均测量值分别为3.45±0.29cm和3.44±0.25cm。颅骨左右两侧的平均距离在统计学上无显著差异。
本研究为通过翼点进行安全的神经外科手术提供了关于翼点位置的有用数据。此外，关于翼点不同形态类型的知识有助于放射科医生区分骨折线和正常形态变异。
