【摘要】 目的 :探讨肺空洞病变多层螺旋CT仿真内镜 (CTVE)成像技术及其初步临床运用。方法 :选择 13例肺空洞患者进行常规横断面CT扫描 ,将容积数据重建后输入GEAW 4.0工作站 ,用三维导航软件 (Navigator)重建成仿真内镜图像 ,调整阈值及视角并用伪彩技术立体观察空洞内表面情况。结果 :癌性空洞 8例 ,肺脓疡空洞 3例 ,结核性空洞 2例。癌性空洞内壁不规则 ,多伴大小不等壁结节 ,表面光滑 ;肺脓疡空洞内壁毛糙 ,显示多发锯齿状、柱状、火山口状改变 ;结核性空洞内壁光滑、规则 ,无结节状改变。对于直径 >3cm空洞 ,CTVE可较满意地获得立体的肺空洞内表面图像 ,空洞内结节的形态、大小、数量以及与空洞内壁联结关系 ,对直径 1.5～ 3 .0cm空洞 ,需调节适当阈值 ,扩大视角显示较好 ;对直径 <1.5cm空洞 ,CTVE显示困难。结论 :肺空洞CTVE成像是对常规CT重要补充 ,但不能作为独立诊断依据 ,必须结合CT原始图像及重建图像进行综合分析更多还原

【Abstract】 Objective:To explore the technique and clinical application of multislice helical CT virtual endoscopy (CTVE) in evaluation of lung cavity disease.Methods:13 patients with lung cavities were examined by multislice helical CT scanning.CT virtual endoscopy (CTVE) was reconstructed with 3D navigator software on the GE AW 4.0 workstation. Results: In the cavities of lung cancer CTVE showed irregular inner wall with various size of nodular lesions (n=8).CTVE showed rough inner wall with columnar,sawtooth like and crater like appearance in the cavities of lung abscess (n=3). In the cavity of lung tuberculosis CTVE showed smooth regular inner wall without nodular lesion (n=2).CTVE could clearly show 3D images of inner wall of the cavity,when the diameter was greater than 3cm.By adjusting threshold value and expanding visual angle,CTVE can also clearly show 3D images of lung cavities whose diameter was between 1.5～3.0cm.CTVE was very difficult to demonstrate 3D images of lung cavities whose diameter was smaller than 1.5cm.Conclusion:CT virtual endoscopy of lung cavity is an important supplement to conventional CT,but it can’t make the diagnosis indepen dently and must combine together with the CT source images and other reconstructed images.更多还原