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目的探讨松果体区结构在连续薄层冠状断面上形态结构的变化规律,为该区病变的影像学诊断和外科治疗提供解剖学依据。方法选择1例成人头部标本,应用冷冻数控铣削技术由前向后垂直于连合间线(AC-PC线)进行铣削。另选择健康成年男性10名,应用3D SPGR序列行与标本基线一致的3.0 T MR扫描。选取典型的断面标本图像与相应活体的MRI图像进行对照研究,探讨主要结构的变化规律。结果根据松果体柄的出现和松果体的消失,可将松果体区由前向后分为前、中、后3个部分,其形态由倒三角形向梯形、三角形依次过渡。在松果体区的前、中部内,第I间隙逐渐增大;至松果体区后部时则开始减小直至消失。大脑内静脉始终位于松果体区的中线上,其高度逐渐下降。结论应用冷冻数控铣削技术所获取的松果体区薄层断面标本图像,能清晰显示该区各结构的形态变化规律及与周围组织毗邻关系,为该区微小病变的影像诊断和外科治疗提供了详实的解剖学依据。
Objective To investigate the morphological changes of the pineal region structure in the continuous thin-section coronal section, and to provide anatomical basis for the imaging diagnosis and surgical treatment of the lesion in this region. Methods One adult adult head specimen was selected and milled from the front to the back perpendicular to the interlaminar line (AC-PC line) using a frozen CNC milling technique. In addition, 10 healthy adult males were selected. The 3.0-T MR scan was performed using the 3D SPGR sequence and the baseline of the sample. Select the typical cross-sectional images and the corresponding MRI images of living control study to explore the main structure of the law of change. Results According to the appearance of pineal trunk and the disappearance of pineal gland, the pineal gland area can be divided into three parts: anterior, middle and posterior from the anterior to posterior, and the transition from inverted triangle to trapezoid and triangle. In the pineal region before and after the middle, the first gap gradually increased; to the pineal region began to reduce until the rear until disappear. Intravenous veins are always located in the midline of the pineal region, and their height decreases gradually. Conclusion The thin-section specimen images of pineal region obtained by freezing numerical control milling technology can clearly show the morphological changes of each structure and its adjacent relationship with the surrounding tissues, providing the image diagnosis and surgical treatment for the minimal lesion in this area Detailed anatomical basis.