腮腺肿瘤的CT 研究

 目的 研究CT诊断腮腺肿瘤的价值。方法 68例行CT扫描与病理诊断作对照研究。结果CT诊断腮腺肿瘤的敏感性为94．6％，特异性为66．6％，漏诊率5．3％，误诊率33．3％，总符合率为89．7％。CT鉴别诊断良、恶性肿瘤的敏感性为82．0％，特异性为78．0％，漏诊率为18．0％，误诊率为22．0％，总符合率为80．9％。结论CT扫描诊断腮腺肿瘤敏感性、特异性均较高，有一定价值，但对肿瘤良、恶性敏感性的分辨有限，病灶边缘模糊不清是判断恶性肿瘤的重要征象。

CT Study on Parotid Tumors

Objective To Study on the value of CT in the diagnosis of parotid tumors. Methods To comparative study of CT and pathology 68 patients with parotid tumors were carried out by using. Results In CT diagnosis, the sensitivity was 94.6 %, the specificity is 66.6 %, the missing rate was 5.3 % and the error rate was 33.3 %, accuracy was 89.7 %. CT in differential rate of benign and malignant; the sensitivity was 82.0 %, the specificity was 78.0 %, the missing rate was 22.0 % and the error rate was 18.0 %, accuracy was 80.9 %. Conclusion CT has high susceptible and characteristic to diagnoses parotid tumors, and had greater value in diagnosis of parotid tumors. But CT was only reference value to different parotid tumors from malignant ones. The ill defined margin and infiltration of mass is helpful in predicting malignant lesion.