目的研究核素肺吸入、灌注显像对鉴别貌似炎症的急性肺栓塞及真正肺部炎症的价值。消除由于误诊耽误最佳溶栓时机的危险。方法对１４例伴有胸痛、咳嗽或发热的急性肺栓塞及１０例肺部炎症患者进行核素肺吸入灌注显像。以其损伤肺段当量数占被检肺段的百分比及其形态学改变对两种疾病在两种显像中的表现进行比较分析。并与Ｘ线胸片进行对比。结果急性肺动脉栓塞肺灌注显像示以肺段分布的异常放射性缺损区，损伤肺段当量数占被检肺段的２７％；吸入显像基本正常，仅占０４％。反之，肺部炎症则示吸入损伤明显，按或不按肺段分布，占被检肺段的４０％；灌注显像占２４％，部位与吸入像匹配，多为放射性减低。急性肺栓塞的Ｘ线胸片为正常、血管纹理减少或非特异改变；而肺部炎症则改变明显。结论急性肺动脉栓塞尤其貌似炎症者核素显像诊断价值较高。肺部炎症动态观察Ｘ线胸片诊断价值较高。但核素显像亦有能区别于栓塞的特点。肺栓塞合并炎症者，核素显像、特别是动态观察具有独特价值。灌注显像损伤范围可大于吸入影像损伤范围，病变呈以肺段形态分布的放射性缺损。而单纯炎症吸入影像损伤范围大于灌注，且灌注像可为不按肺段分布的放射性减低 Objective To study the value of radionuclide pulmonary instillation and perfusion imaging in differentiating between acute pulmonary embolism and true pulmonary inflammation. Eliminate the risk of having the best timing of thrombolysis due to misdiagnosis. Methods 14 cases of acute pulmonary embolism with chest pain, cough or fever and 10 cases of lung inflammation were performed lung perfusion perfusion imaging. The comparative analysis of the performance of the two diseases in the two kinds of imaging was made by comparing the percentage of equivalent lung segments and the percentage of lung segments examined and its morphological changes. And with X-ray contrast. Results Acute pulmonary embolism lung perfusion imaging showed abnormal radioactive defect area of ​​pulmonary distribution. The equivalent number of injured lung segment accounted for 27% of the detected pulmonary segment. The imaging of inhalation imaging was normal and accounted for only 04%. On the contrary, pulmonary inflammation showed significant inhalation injury, press or not according to pulmonary distribution, accounting for 40% of seized lung segment; perfusion imaging accounted for 24%, part of the inhalation image matching, mostly for radioactive reduction. Acute pulmonary embolism of the chest X-ray is normal, reduced vascular texture or non-specific changes; and lung inflammation changed significantly. Conclusions Acute pulmonary embolism is particularly valuable in the diagnosis of radionuclide imaging. Dynamic observation of pulmonary inflammation X-ray diagnosis of high value. However, nuclide imaging can also be distinguished from the characteristics of embolism. Pulmonary embolism with inflammation, radionuclide imaging, especially the dynamic observation has a unique value. Perfusion imaging injury range can be greater than the scope of inhalation image damage, the lesions were radioactive defect distribution of the lung segment morphology. Inflammation of the simple image damage range than perfusion, perfusion and may not be allocated according to the radioactive pulmonary segment decreased