对80例受试者,就肺 CT 密度与年龄、身高、呼吸量、肺容量、弥散容量和动脉血气张力的关系作了研究,并对 CT 扫描肺密度能否代替肺气肿病理检查进行了探讨。受试者80(男63、女17)例,年龄23～82岁,其中包括呼吸功能正常者及慢性呼吸衰竭者,非吸烟者仅5例。受试者胸部 X 线平片或 CT 扫描均无肺气肿性大疱证据,所有患者临床稳定,且6周内未发生感染。CT 扫描前1～21天均作了呼吸生理指标测定。 In 80 subjects, the relationship between lung CT density and age, height, respiration, lung volume, diffuse volume and arterial blood gas tension was studied and CT scan lung density could be substituted for the pathological examination of emphysema Discussion. Subjects 80 (63 men and 17 women), aged 23 to 82 years old, including those with normal respiratory function and chronic respiratory failure, only 5 non-smokers. Subjects had no evidence of emphysematous bullous lesions on chest radiographs or CT scans. All patients were clinically stable and had no infection within 6 weeks. 1 to 21 days before CT scan were made of respiratory physiology.