额隐窝区域解剖结构3D影像学研究

目的：通过对获得的额隐窝区域的CT影像学数据进行三维重构,力求对于该区域重要的解剖结构进行客观、真实的再现。方法：选择接受鼻窦检查的5例患者,对其头部行多排螺旋CT扫描（螺距1mm,扫描层厚2mm,层距-1mm）,然后在图像工作站上进行三维图像重建,并形成3D模型。观察该模型上鼻丘气房、额气房、眶上气房、额泡气房等解剖标志的形态、相对空间排列以及其相应的引流途径,并对额窦和鼻腔气房的几何尺寸以及两者之间的空间距离进行精确测量。结果：经过上述处理得到非常接近真实状态的鼻腔-鼻窦气房结构模型,在其额隐窝部位可以清晰地辨识出鼻丘气房、额气房等重要结构,并对所有患者额窦、鼻丘气房以及两者之间的垂直距离做了较为精确的测量。结论：借助三维重建技术可以得到鼻腔-鼻窦内气房3D结构模型;同时可对其中的重要结构进行空间定位,并对其相互之间的距离进行精确测量,为手术提供了可靠指导。

3D computed tomographic analysis of frontal recess region

Objective： The purpose of the study was to observe the three-dimensional（3D） CT imaging features of the frontal recess region with 3D reconstruction, and obtain the real image of the important anatomical struc- tures of the region to conduct surgery. Method.. Five patients were undergone spiral CT by 16 line high speed spiral CT, and multiplanar reconstruction images using standard 3D reconstruction protocol on a computer workstation. The structure of the frontal recess, the agger nasi cell and adhere style of the uncinate process were observed. The parameter of the important anatomic structure of frontal recess was measured precisely. Result： After the recon- struction, we get the 3D model very close to the true state of the nasal cavity - sinuses cell, in which parts of the frontal recess can clearly identify the agger nasi cell, frontal cell and other important structures. In this patient, the height, width and depth of the agger nasi and frontal sinus were 12.3 mm, 12.1 mm, 38.5 mm, respectively. Conclusion：This study tried to develop the standardized techniques and measurements from 3D reconstructed ima- ges of the frontal sinus and to ascertain the usefulness of the frontal sinus in identification of patients. The results in better preoperative patient counselling and in predicting postoperative improvement in clinical status.