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目的探讨常规CT窗口技术对超急性期脑梗死的诊断价值,为临床尽早采取合理的溶栓治疗提供重要依据。方法将临床高度可疑脑梗死的67例患者在发病6 h内行常规CT检查后,采用2种改良窗口技术与常规CT窗口技术进行回顾性统计学分析,比较不同窗口技术对超急性期脑梗死的检出率。结果经随访证实37例脑梗死中,常规窗口技术①(W:90 Hu,C:35 Hu)敏感性为29.7%,特异性为100%;改良窗口技术②(W:80 Hu,C:50 Hu)敏感性为40.5%,特异性为100%;改良窗口技术③(W:50 Hu,C:50 Hu)敏感性为75.7%,特异性为100%。3种不同窗口技术对超急性期脑梗死检出率的比较,差异有统计学意义(χ2=12.0,P<0.05)。改良窗口技术③与常规窗口技术①比较,改良窗口技术③与改良窗口技术②比较,差异均有统计学意义(P<0.01,P<0.05),窗口技术①与②比较,差异无统计学意义(P>0.05)。结论合理的CT窗口技术能有效提高超急性期脑梗死的检出率,为临床尽早采取合理的溶栓治疗提供重要依据。
Objective To investigate the diagnostic value of routine CT window in the diagnosis of hyperacute cerebral infarction and provide an important basis for rational thrombolytic therapy as soon as possible. Methods Sixty-seven patients with clinically highly suspicious cerebral infarction underwent routine CT examination within 6 hours after onset of disease. Two kinds of modified window techniques and conventional CT window technique were used for retrospective statistical analysis. The effects of different window techniques on hyperacute cerebral infarction The detection rate. Results The follow-up confirmed 37 cases of cerebral infarction, the conventional window technology ① (W: 90 Hu, C: 35 Hu) sensitivity was 29.7%, specificity was 100%; improved window technology ② (W: 80 Hu, C: 50 Hu) with a sensitivity of 40.5% and a specificity of 100%. The improved window technique ③ (W: 50 Hu, C: 50 Hu) had a sensitivity of 75.7% and a specificity of 100%. There were significant differences in the detection rates of hyperacute cerebral infarction between the three different window techniques (χ2 = 12.0, P <0.05). Improved window technique ③ compared with the conventional window technique ①, improved window technique ③ compared with the improved window technique ②, the differences were statistically significant (P <0.01, P <0.05), window technology ① and ② compared with no significant difference (P> 0.05). Conclusion The reasonable CT window technique can effectively improve the detection rate of hyperacute cerebral infarction and provide an important basis for rational thrombolytic therapy as soon as possible.