双能量CT脑血管成像的初步临床应用  

Clinical Application of Dual-energy CT in Intracranial Angiography

作　　者：蒲红[1] 白林[1] 彭泽华[1] 蒲锘[1] 陶客言[1] 赵原[1] 黄红云[1] 高燕[1] 张晓军[1] 杨靖逸[1] 黄颜源[1] 

机构地区：[1]四川省医学科学院四川省人民医院CT室,四川成都610072

出　　处：《实用放射学杂志》2009年第10期1470-1472,共3页Journal of Practical Radiology

摘　　要：目的探讨双能量CT脑血管成像的临床应用价值。方法对30例临床怀疑颅内血管性病变患者进行双能量CT血管成像检查，扫描采用双能量程序，一次性扫描采集2个不同能量的数据。所得原始数据的后处理采用80kV及140kV2个不同能量的数据进行直接去骨减影（即双能量减影），并保存减影后数据。所有病例均完成容积显示（VR）和最大密度投影（MIP）。全部病变结果均经手术或介入栓塞证实。结果30例病人双能量减影均清晰显示颈内动脉颅内主干及主要分支，Willis环显示清楚。其中19例动脉瘤病例均清晰显示动脉瘤大小、形态，与载瘤动脉关系，瘤颈及瘤轴指向，及其动脉瘤与邻近血管分支的空间关系，其中17例为单个动脉瘤，2例为2个动脉瘤，动脉瘤直径2～35mm，平均约4．7mm。4例血管畸形病例均清晰显示异常血管团形态和范围。结论双能量CT血管造影能够清晰显示正常颅内血管及血管性病变，是一种具有发展潜力的检查方法。Objective To evaluate the chinical applied value of dual-energy CT in intracranial angiography. Methods The dual-energy CT angiography（ CTA） was performed in 30 cases suspected clinically intracranial vessel disease using dual-energy protocols. Two different data were collected in only one scanning. Direct remove-bone subtraetionldual-energy subtractionl was performed with 80 kV and 140 kV different energy data in post process. The data of all patients were reconstructed with maximum intensity projection （MIP）, volume rendering （VR）. The results were compared with that of surgery or DSA. Results The main trunk and branch of internal carotid artery and Willis cycle were displayed clearly with dual-energy subtraction in all patients. A total of 19 aneurysms were detected by dual-energy CTA in 30 patients,and the size, shape, neck, axis point of aneurysms,the three dimensional relationship of aneurysms to the branches of near vessels were clearly showed by CTA. Single aneurysm in 17 cases and two aneurysms in 2 cases were detected by CTA. The diameters of aneurysms were 2-35 mm with average of 4.7 mm. The shape of vessels bolus and size were demonstrated clearly in 4 patients with vessel malformation. Conclusion Intracranial normal and abnormal vessels can displayed by dual-energy CTA accurately,that is an examining method which is of potential development.

关 键 词：脑 体层摄影术 X线计算机 双能量 血管成像 动脉瘤 

分 类 号：R734[医药卫生—肿瘤] R814.42[医药卫生—临床医学]