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目的：探讨螺旋ＣＴ３Ｄ重建的临床应用价值和重建技术。方法：３０例中男性１８例，女性１２例，均经手术和病理证实。均用螺旋ＣＴ扫描，层厚３～５ｍｍ床进速度为３～５ｍｍ／ｓ，薄层重建１～３ｍｍ，颅内肿瘤均行增强扫描。３Ｄ重建在独立诊断台上进行，选择重建时的合适阈值，颅骨１００～２００Ｈｕ，肿瘤８０～１００Ｈｕ，分别进行颅骨、肿瘤及血管的３Ｄ重建并用假彩色技术处理，使用不同的旋转轴观察病变，测量肿瘤在三维空间的距离、角度和体积。结果：全部病例都能清楚显示病变的立体解剖图像及其与周围关系，显示瘤体与血管关系者２２例。结论：３ＤＣＴ简化了观察者的思维过程，可直观地了解病变在三维立体空间的实际大小、形态、位置及周围组织结构的立体解剖关系，为制订手术方案和放疗计划提供了客观依据。并可用于形象化教学。
Objective: To investigate the clinical value and reconstruction of spiral CT3D reconstruction. Methods: Among 30 cases, 18 males and 12 females were confirmed by operation and pathology. All with spiral CT scan, the bed thickness 3 ~ 5mm bed into the speed of 3 ~ 5mm / s, thin layer reconstruction 1 ~ 3mm, enhanced intracranial tumors were scanned. The 3D reconstruction was performed on an independent diagnostic stage. The appropriate threshold value for reconstructive surgery was selected. The skull was 100-200Hu and the tumor was 80-100Hu. 3D reconstruction of the skull, tumor and blood vessels were performed and treated with false color technique. The lesions were observed with different rotation axes, Measure the distance, angle and volume of tumor in three-dimensional space. Results: All cases were able to clearly show the three-dimensional anatomic images of the lesion and its relationship with the surrounding areas, showing the relationship between tumor and blood vessels in 22 cases. Conclusion: 3DCT simplifies the thinking process of the observer, and can intuitively understand the stereo anatomical relationship of the actual size, shape, location and surrounding tissue structure of the lesion in three-dimensional space, providing an objective basis for formulating surgical plans and radiotherapy plans. And can be used to visualize teaching.