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目的：分析胸腔积液病人的胸部ＣＴ片，总结出对鉴别胸膜良、恶性病变有价值的ＣＴ征象。材料和方法：对１００例胸腔积液病人，利用最大拟然判别法，把它们的征象转化成计分值，并对４５例胸腔积液病人进行前瞻性判别。结果：ＣＴ对结核性胸膜病变的诊断正确率为６７．０％，与主要临床症状结合正确率为８７．５％；ＣＴ对恶性胸膜病变的诊断正确率为６９．０％，与主要临床症状结合正确率达８６．２％。结论：ＣＴ对胸膜病变的良、恶性鉴别诊断有价值，与主要临床症状结合能提高诊断的正确率。对疑难病例，应提倡胸膜穿刺活检，甚至开胸探查
OBJECTIVE: To analyze the chest CT of patients with pleural effusion and summarize the CT signs that are valuable in differentiating benign and malignant pleural diseases. Materials and Methods: 100 cases of pleural effusion patients, the use of the maximum likelihood discriminant method, their signs into scoring values, and 45 cases of pleural effusion patients were prospectively identified. Results: The correct rate of CT diagnosis of tuberculous pleural disease was 67.0%, and the accuracy of combined with the main clinical symptoms was 87.5%. The diagnostic accuracy rate of CT in malignant pleural disease was 69.0%, which was consistent with the main clinical symptoms The correct combination rate reached 86.2%. Conclusion: CT is valuable for the differential diagnosis of benign and malignant pleural diseases. Combined with the main clinical symptoms can improve the diagnostic accuracy. Difficult cases, pleural biopsy should be promoted, and even open chest exploration