多层螺旋CT诊断主动脉瘤的价值探讨  

The evaluation of MSCT in the diagnosis of aortic aneurysm

作　　者：沈庆隆[1] 黄睿刚[1] 蔡毅勇[1] 余主花[1] 黄炎坤[1] 

机构地区：[1]漳州市医院CT室,福建漳州363000

出　　处：《中国中西医结合影像学杂志》2003年第4期221-222,225,共3页Chinese Imaging Journal of Integrated Traditional and Western Medicine

摘　　要：目的:探讨多层螺旋CT及后处理技术诊断主动脉瘤的价值。方法:使用美国GElightspeed QX/I型多层螺旋CT(MSCT)对疑有或有主动脉疾病的21例患者行轴位容积扫描,扫描条件:120 kV、300 mA,5 mm准直,7.5 mm/sec进床速度,HQ或HS扫描模式。重建层厚2.5 mm,重建间隔1.25 mm。用MEDRAD ENVISION高压注射器,经静脉团注非离子型造影剂100 ml,注射流率为2.8-3.5 ml/s。将横断面图像传至GE advantagewindows 4.0工作站进行二维和三维重建,包括多平面重建(MPR)、最大密度投影(MIP)、表面遮盖法重建(SSD)、容积再现(VR)、CT、仿真内窥镜重建(CTVE)及电影分析成像。结果:21例中主动脉瘤6例,主动脉夹层13例,其中Ⅰ型4例,Ⅱ型1例,Ⅲ型8例,马凡氏综合征2例。13例主动脉夹层在轴位图像均可见高密度的真腔和假腔,真腔小而密度略高于假腔,真假两腔之间的低密度弧型影为撕破的内膜。MIP、CTVE重建发现6例主动脉夹层破口,附壁血栓6例,发现主动脉外壁溃疡破口2例,主动脉内膜钙化并内移>5 mm7例。结论:MSCT成像技术作为一种非创伤性的血管成像方法,具有安全、可靠的优越性。Objective: To evaluate the value of MSCT and post-processing in the diagnosis of aortic aneurysm. Methods: Volume scanning was performed in 21 patients(Scanning condition: 120KV, 300 mA, 5mm collimator, 7. 5mm/ sec table speed, 2, 5mm reconstruction slice thickness, 1.25mm reconstruction gap). 100ml non - iron contrast media was bolus - injected through vein by power inject at the speed of 2. 8-3. 5ml/s. Data was transferred to workstation to perform 2D or 3D reconstruction. MPR, MIP, SSD, VR, CTVE and cine imaging were gained by raw data. Results: In the 21 cases of aortic aneurysms, there were 13 dissections and 2 Marfan's syndrome. All the 13 cases of dissections showed the real and false channel. The former was smaller and showed higher density than the latter. The arch-like hy-podensity between the two channels were intimal flap ruptured. There were six cases of dissections with ruptured flap, six with mural plaque, two with rapture of aorta, and seven with calcification and shifting inward of the aortic intimal flap. Conclusion: As an imaging method of vessel, the imaging technique of MSCT is not injurious, and is secure and other u-nique advantages. It is conformed having great value to diagnose aortic aneurysm.

关 键 词：主动脉瘤 体层摄影术 X线计算机 

分 类 号：R543.16[医药卫生—心血管疾病]