BACKGROUND Finite element modeling of the human head offers an alternative to experimental methods in understanding the biomechanical response of the head in trauma brain injuries. Falx, tentorium, and their notches are important structures surrounding the brain, and data about their anatomical variations are sparse. OBJECTIVE To describe and quantify anatomical variations of falx cerebri, tentorium cerebelli, and their notches. METHODS 3D reconstruction of falx and tentorium was performed by points identification on 40 brain CT-scans in a tailored Matlab program. A scatter plot was obtained for each subject, and 8 anatomical landmarks were selected. A reference frame was defined to determine the coordinates of landmarks. Segments and areas were computed. A reproducibility study was done. RESULTS The height of falx was 34.9 ± 3.9 mm and its surface area 56.5 ± 7.7 cm2. The width of tentorium was 99.64 ± 4.79 mm and its surface area 57.6 ± 5.8 cm2. The mean length, height, and surface area of falx notch were respectively 96.9 ± 8 mm, 41.8 ± 5.9 mm, and 28.8 ± 5.8 cm2 (range 15.8-40.5 cm2). The anterior and maximal widths of tentorial notch were 25.5 ± 3.5 mm and 30.9 ± 2.5 mm; its length 54.9 ± 5.2 mm and its surface area 13.26 ± 1.6 cm2. The length of falx notch correlated with the length of tentorial notch (r = 0.62, P < 0.05). CONCLUSION We observe large anatomical variations of falx, tentorium, and notches, crucial to better understand the biomechanics of brain injury, in personalized finite element models.

中文翻译：

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常规CT扫描的表面重建显示了小脑和小脑腱的大的解剖学变化。

背景技术人头的有限元建模为理解创伤性脑损伤中头部的生物力学响应提供了实验方法的替代方法。Falx，Tentorium及其缺口是大脑周围的重要结构，有关其解剖变异的数据很少。目的描述和量化小脑，小脑腱及其切迹的解剖学变异。方法通过在量身定制的Matlab程序中对40台脑部CT扫描进行点识别，来进行3D重建镰刀状和腱鞘的重建。获得每个受试者的散点图，并选择8个解剖标志。定义参考框架以确定地标的坐标。计算了段和面积。进行了再现性研究。结果falx的高度为34.9±3。9毫米，表面积56.5±7.7平方厘米。tor的宽度为99.64±4.79mm，其表面积为57.6±5.8cm 2。镰状切口的平均长度，高度和表面积分别为96.9±8 mm，41.8±5.9 mm和28.8±5.8 cm2（范围15.8-40.5 cm2）。张口切迹的前部和最大宽度分别为25.5±3.5 mm和30.9±2.5 mm; 其长度为54.9±5.2毫米，表面积为13.26±1.6平方厘米。镰状切口的长度与腱切切口的长度相关（r = 0.62，P <0.05）。结论我们在个性化的有限元模型中观察到了大的解剖变异，如镰状，腱鞘和切口，这些对于更好地了解脑损伤的生物力学至关重要。Falx切口的表面积和表面积分别为96.9±8 mm，41.8±5.9 mm和28.8±5.8 cm2（范围15.8-40.5 cm2）。张口切迹的前部和最大宽度分别为25.5±3.5 mm和30.9±2.5 mm; 其长度为54.9±5.2毫米，表面积为13.26±1.6平方厘米。镰状切口的长度与腱切切口的长度相关（r = 0.62，P <0.05）。结论我们在个性化的有限元模型中观察到了大的解剖变异，如镰状，腱鞘和切口，这些对于更好地了解脑损伤的生物力学至关重要。Falx切口的表面积和表面积分别为96.9±8 mm，41.8±5.9 mm和28.8±5.8 cm2（范围15.8-40.5 cm2）。张口切迹的前部和最大宽度分别为25.5±3.5 mm和30.9±2.5 mm; 其长度为54.9±5.2毫米，表面积为13.26±1.6平方厘米。镰状切口的长度与腱切切口的长度相关（r = 0.62，P <0.05）。结论我们在个性化的有限元模型中观察到了大的解剖变异，如镰状，腱鞘和切口，这些对于更好地了解脑损伤的生物力学至关重要。镰状切口的长度与腱切切口的长度相关（r = 0.62，P <0.05）。结论我们在个性化的有限元模型中观察到了大的解剖变异，如镰状，腱鞘和切口，这些对于更好地了解脑损伤的生物力学至关重要。镰状切口的长度与腱切切口的长度相关（r = 0.62，P <0.05）。结论我们在个性化的有限元模型中观察到了大的解剖变异，如镰状，腱鞘和切口，这些对于更好地了解脑损伤的生物力学至关重要。