MSCTA诊断肺栓塞扫描延迟方法的探讨  

Delayed scanning method in multi-slice spiral CT for diagnosis of pulmonary embolism

作　　者：付传明[1] 陈文[2] 龚晓红[1] 陈伦刚[1] 王开华[1] 邹建华[1] 

机构地区：[1]郧阳医学院附属太和医院影像科,湖北十堰442000 [2]湖北省十堰市太和医院影像科CT室,442000

出　　处：《中国介入影像与治疗学》2009年第4期321-323,共3页Chinese Journal of Interventional Imaging and Therapy

摘　　要：目的比较多排螺旋CT血管造影(MSCTA)不同扫描延迟方法在肺栓塞(PE)诊断中的应用效果。方法60例临床可疑PE患者随机平均分A、B、C三组,采用相同碘浓度、注射速率、对比剂用量(对比剂浓度300mgI/ml,注射速率3ml/s,注射对比剂60ml后用40ml生理盐水冲刷),并进行MSCTA检查。扫描延迟方法:A组:固定时间法(经验法15s);B组:小剂量时间-密度曲线测试法;C组:对比剂追踪触发技术。采用最大密度投影(MIP)、多平面重组(MPR)及容积再现技术(VR)对肺动脉栓子数目、部位、形态进行评价,并与DSA结果比较。结果A组MSCTA检查成功率55.00%(11/20);B、C两组MSCTA检查成功率100%;3组诊断结果与DSA结果比较诊断符合率均为96.04%(291/303)。结论MSCTA诊断PE的最佳扫描延迟方法为对比剂追踪触发技术。Objective To compare different delayed scanning methods in multi-slice spiral CT angiography （MSCTA）in diagnosis of pulmonary embolism （PE）. Methods Sixty patients with suspected PE were divided into three groups （A, B and C）. MSCT with same Iodine concentration, injection rate, contrast medium but different delayed scanning methods was performed after injection of contrast medium. Patients in group A were examined with fixed time method （15s）, in group B with small dose-density curve method, while in group C with contrast medium track and triggering technoligy. The number, position and the shapes of emboli were evaluated with MIP, MPR and VR. Results The successful examination rate of group A was 55.00% （11/20）, while of group B and C was both 100%. The coincidence rate of MSCTA compared with DSA in each group was 96.04% （291/303）. Conclusion The best delayed scanning method in MSCTA for diagnosis of pulmonary embolism is contrast medium tracking and triggering technology.

关 键 词：体层摄影术 X线计算机 肺栓塞 扫描延迟 

分 类 号：R563.5[医药卫生—呼吸系统] R816.4[医药卫生—内科学]