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目的探讨ＣＴ测量肺动脉直径诊断尘肺肺心病的价值。方法选择２５例尘肺肺心病和７３例尘肺无肺心病患者及６０例正常人进行ＣＴ扫描，测量主肺动脉（ＭＰＡ）、右肺动脉（ＲＰＡ）和左肺动脉（ＬＰＡ）直径。结果肺心病患者的ＭＰＡ、ＲＰＡ和ＬＰＡ直径显著大于尘肺组和健康对照组（Ｐ＜０．０１）；尘肺组ＭＰＡ、ＲＰＡ直径均明显大于健康对照组（Ｐ＜０．０１或Ｐ＜０．０５）。以ＭＰＡ＞３０ｍｍ为肺心病诊断标准，其诊断敏感性、特异性和准确性分别为９６．００％、９３．９８％和８１．６５％。结论ＣＴ测量肺动脉直径可作为早期诊断肺心病的一项新指标。
Objective To investigate the value of CT pulmonary artery diameter in the diagnosis of pneumoconiosis. Methods Twenty-five pneumoconiosis patients, 73 pneumoconiosis patients and 60 normal controls were selected for CT scan. The diameters of the main pulmonary artery (MPA), right pulmonary artery (RPA) and left pulmonary artery (LPA) were measured. Results The diameters of MPA, RPA and LPA in patients with pulmonary heart disease were significantly higher than those in pneumoconiosis group and healthy control group (P <0.01). The diameters of MPA and RPA in pneumoconiosis group were significantly larger than those in healthy control group (P <0.01 or P <0.01). 05). With MPA> 30mm as diagnostic criteria for pulmonary heart disease, the diagnostic sensitivity, specificity and accuracy were 96.00%, 93.98% and 81.65% respectively. Conclusions CT measurement of pulmonary artery diameter can be used as a new indicator of early diagnosis of pulmonary heart disease.