应用CT密度差后处理技术早期诊断大脑中动脉供血区脑梗死

Using CT density-difference postprocessing in early diagnosis of acute middle cerebral artery occlusion

目的 研究应用CT密度差后处理技术早期诊断大脑中动脉 (MCA)梗死的可行性。方法 对临床考虑为MCA梗死 ,发病 1～ 3h患者行CT扫描 ,随机分为两组 ,用密度差后处理组 5 0例 ,不用密度差后处理组 5 0例 ,于发病 2 4h后进行CT跟踪观察。结果 应用密度差后处理组 ,梗死后 <6 0min、6 0～ 119min、12 0～ 180min确诊例数分别为 1例 (1/ 7)、2 9例 (2 9/ 32 ,90 .6 % )、11例 (11/11) ,而不用密度差后处理组只在发病 12 0～ 180min确诊 2例 (2 / 11)。结论 利用CT密度差后处理技术能对MCA梗死的患者作出早期诊断。

Objective To examine the feasibility by applying the CT density-difference postprocessing in early diagnosis of middle cerebral artery (MCA) occlusion. Methods The possible MCA occlusion patients were scanned with CT in early stage (within 3 hours) and divided into two groups randomly.Each group included 50 samples and one was processed technologically by CT density-difference and the other one was not.The two groups were scanned once more in 24 hours later and the data being processed by statistical method. Results The results showed that the accurate diagnosis rates were 14.3% within 60 minutes,93.3% from 60 to 119 minutes and 100% from 120 to 180 minutes .In comparing these two groups,there appeared no significant differences in the situation within 60 minutes and there was found significant difference in the other two situations. Conclusion Applying the technology of CT density-difference postprocessing,the middle cerebral artery (MCA) occlusion in early stage might be diagnosed.