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目的 探讨螺旋CT容积漫游技术 (VRT)三维成像方法 ,评价其临床应用范围与价值。材料与方法 47例VRT三维重建病例包括 :血管组 19例 ,骨关节组 16例 ,其他部位组 12例 ;扫描技术及对比剂使用参数根据部位及病变性质具体设置 ,同时将VRT与SSD及MIP作简单比较。结果 选择 2或 3个显示目标及其合适的CT值范围、不透明度百分率可获得良好的VRT立体成像 ,显示血管组病变 13例包括血管畸形 6例 ,血管栓塞、血管受肿瘤推压侵犯各 2例 ,颈静脉球高位、烟雾病、胃底静脉曲张各 1例 ;显示骨关节组病变 14例中颅底骨折 5例 ,关节面骨折 3例 ,关节脱位、椎间孔变窄、椎间盘脱出各 2例 ;其他部位组病变 7例中脑积水2例 ,支气管肺癌、胃癌、结肠癌、脑血肿、肾外肾盂畸形各 1例。结论 VRT 3D血管造影是快速而有效的无创伤血管成像术 ,优于SSD及MIP ,部分可替代DSA。VRT 3D骨关节显示清楚直观 ,有利于骨折、关节半脱位的诊断及测量 ,VRT 3D在尿路、气管支气管树、胃肠道、脑室等方面亦具有一定的临床应用价值。
Objective To explore the three-dimensional imaging method of spiral CT volume roaming (VRT) and evaluate its clinical application and value. Materials and Methods 47 cases of VRT three-dimensional reconstruction cases include: vascular group of 19 cases, bone and joint group of 16 cases, other parts of the group of 12 cases; scanning technique and contrast agent using parameters according to the site and the nature of the lesion specific settings, while VRT and SSD and MIP For a simple comparison. Results Select 2 or 3 display targets and their suitable range of CT values. The opacity percentage can get good VRT stereoscopic imaging. The results showed that 13 cases of vascular diseases including vascular malformations, 6 cases of vascular embolism, Cases of high jugular bulb, moyamoya disease, gastric varices in 1 case; showed bone and joint disease in 14 cases of skull fracture in 5 cases, 3 cases of articular fractures, joint dislocation, foraminal narrowing, discectomy 2 cases; other parts of the group of 7 cases of hydrocephalus in 2 cases, bronchial lung cancer, gastric cancer, colon cancer, cerebral hematoma, extrarenal renal pelvis in 1 case. Conclusion VRT 3D angiography is a fast and effective noninvasive vascular imaging, which is superior to SSD and MIP and can partially replace DSA. VRT 3D bone and joint show clear and intuitive, is conducive to fracture and joint subluxation diagnosis and measurement, VRT 3D in the urinary tract, tracheobronchial tree, gastrointestinal tract, ventricle also has some clinical value.