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目的： 探讨三维ＣＴ 成像在颅内病变中的临床应用价值。材料与方法： 对７１ 例颅内病变患者行螺旋ＣＴ 增强扫描，然后对颅内血管和／ 或病变进行三维重建。其中２３ 例行ＣＴ 血管造影（ＣＴＡ） 扫描（ 延时２０ 秒） ，４８ 例非ＣＴＡ 扫描（ 延时９０ 秒） 。结果： （１）２３ 例ＣＴＡ 扫描者，血管表面遮盖法（ＳＳＤ） 与最大强度投影法（ ＭＩＰ） 重建都能显示颅内动脉的第３ 级分支。ＳＳＤ 对显示血管的立体空间关系比较直观；ＭＩＰ 图像类似ＤＳＡ 图像。（２） ３３ 例颅内病变ＳＳＤ 能清楚显示病变与血管和颅骨的立体解剖全貌，但失去有利于病变定性诊断的密度ＣＴ 征象。３３ 例多平面重建（ ＭＰＲ） 有利于对病灶从多方向观察，保留有助于定性诊断的密度ＣＴ 征象，但缺乏病变与周围解剖结构的立体观。结论： ３ 种三维重建相结合可增加对颅内病变与血管和周围组织结构间的立体解剖信息，使神经外科医生在手术前对病灶有更全面的了解，有助于术前对手术计划的制定。
Objective: To investigate the clinical value of three-dimensional CT imaging in intracranial lesions. Materials and Methods: 71 patients with intracranial lesions underwent spiral CT enhanced scan, and then three-dimensional reconstruction of intracranial blood vessels and / or lesions. Twenty-three of them underwent CT angiography (CTA) scan (20 seconds delay) and 48 non-CTA scan (90 seconds delay). Results: (1) Twenty - three CTA scanners showed that the level 3 branches of intracranial arteries could be displayed by both SSD and MIP reconstruction. SSD on the display of the three-dimensional spatial relationship between blood vessels more intuitive; MIP images similar to DSA images. (2) 33 cases of intracranial lesions of SSD can clearly show the three-dimensional anatomy of the lesion and blood vessels and skull, but lost in favor of the qualitative diagnosis of lesions of density CT signs. 33 cases of multiplanar reconstruction (MPR) is conducive to the lesions observed from multiple directions, retained qualitative diagnosis of CT signs of retention, but the lack of three-dimensional view of the lesion and the surrounding anatomy. CONCLUSIONS: The combination of three three-dimensional reconstructions increases stereotactic information of intracranial lesions and the structure of blood vessels and surrounding tissues, allowing neurosurgeons to have a more complete picture of the lesion prior to surgery and is helpful in preoperative planning of surgical procedures Make.