大脑外侧裂影像解剖学研究及其临床意义
The imaging anatomy study of sylvian fissure and its clinical significance
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摘要: 目的：探讨大脑外侧裂在MRI横断面图像上的形态学规律及临床意义。方法：采集30名正常成人颅脑连续横断面MRI数据,在e-film 2.1工作站中,采取连续追踪法及3D-Cursor技术准确识别外侧裂,将图像导入Adobe Photoshop CS 8.0软件包中标记外侧裂并观测、统计其形态学特征。结果:外侧裂在Z=-18~33 mm层面范围内出现,随着层面下移依次呈现一字型、Y型、T型、L型和一字型的变化规律。依据从下向上岛叶在层面上的出现和消失的规律将外侧裂分为三段。第一段,从外侧裂出现到岛叶出现层面;第二段,从岛叶出现到岛叶消失层面;第三段,从岛叶消失到外侧裂消失层面。左右半球三段垂直深度差异均无统计学意义(P0.05)。右侧大脑半球在Z=6~9 mm范围内,左侧大脑半球在Z=9~15 mm范围内大脑外侧裂弯曲折叠,左侧多于右侧。结论：大脑外侧裂MRI横断面图像上的形态学研究,可为外侧裂及相邻脑区病变的识别和定位,经外侧裂行鞍区、岛叶区及基底核区手术入路部位的选择提供解剖学资料。Abstract: Objective: To investigate the morphological pattern of sylvian fissure in the cross-sectional MRI images and its clinical significance. Methods: The cross-sectional MRI data of 30 normal adults' brain were collected. The sylvian fissure was accurately identified using continuous tracking method and the 3D-Cursor technology in e-film 2. 1 workstation， the images of sylvian fissure were mported inObjective: To Adobe PhoObjective: Toshop CS 8. 0 package and observed， their morphological characteristics were analysed. Results: Sylvian fissure occured at the level of Z = - 18 Objective: To 33 mm. With the present level down， the sylvian fissure showed gradually type - ，Y，T，L and - variation. The sylvian fissure was divided inObjective: To three sections according Objective: To the appearance and isappearance pattern of the insula from the botObjective: Tom up. The first section located from the aspect of sylvian fissure appearance Objective: To the insula disappearance， the second section located from the aspect of the insula appearance Objective: To disappearance，the third section located from the aspect of insula disappearance Objective: To sylvian fissure disappearance. The differences of vertical depth in three sections of left and right hemisphere had no statistical significance(P ＞ 0. 05). During the range of Z = 6 Objective: To 9 mm in right hemisphere and Z = 9 Objective: To 15 mm in left hemisphere，sylvian fissure was bent and folded，which in left side was significantly more than that in right side. Conclusions: The morphological pattern of sylvian fissure in the MRI cross-sectional images can provide the basis of identifing and locating the adjacent brain lesion， and the anaObjective: Tomical information of the surgical approach choosing in saddle area， insula area and basal ganglia area operation.
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Key words:
- brain /
- sylvian fissure /
- imaging anatomy /
- magnetic resonance imaging
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