目的：比较256层螺旋 CT 和64层螺旋 CT 对胸部创伤患者的诊断价值。方法选取110例胸部创伤患者，均采用两种多层螺旋 CT（64层和256层螺旋 CT）检查；比较两种检查方法对于骨折、肺损伤、气胸及液气胸的检出率和两种检查方法的射线剂量情况（包括扫描长度、有效剂量、扫描时间）。结果256层螺旋 CT 对骨折、肺损伤、气胸及液气胸检出率（95．5％、70．9％、31．8％）均显著高于64层螺旋 CT（84．5％、5．5％、20．0％，P ＜0．05）。与64层螺旋 CT 比较，256层螺旋 CT 有效剂量更低[（4．97±1．49）mSv 比（6．03±1．26）mSv，P ＜0．05]，扫描时间更短[（5．38±1．52）s 比（9．26±1．37）s，P ＜0．05]。结论256层螺旋 CT 诊断胸部创伤临床效果优于64层螺旋CT。%Objective To compare the diagnostic values of 256-slice and 64-slice spiral CT in chest trauma.Methods A total of 110 patients with chest trauma received both 256-slice and 64-slice spiral CT examination.The detection rates of fracture,lung injury and pneumothorax/hydro-pneumothorax and radiation conditions(scan length,effective dose and scan time)were compared between the two methods.Results Compared with 64-slice spiral CT,256-slice spiral CT in-creased the detection rates of fracture,lung injury and pneumothorax/hydropneumothorax (95.5% vs 84.5%,70.9% vs 5.5%,and 31.8% vs 20.0%,respectively;P <0.05),decreased the effective dose((4.97±1.49)mSv vs (6.03±1.26)mSv,P <0.05),and shortened the scan time ((5.38±1.52)s vs (9.26±1.37)s,P <0.05).Conclusion The 256-slice spiral CT is superior to 64-slice spiral CT for the diagnosis of chest trauma.
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