目的 探讨吸气相CT肺功能成像对老年性肺气肿的应用价值。方法 选择临床确诊的老年性肺气肿患者60例，均作16 层螺旋CT薄层扫描，通过CT肺功能成像对肺气肿的分级；结果 轻度肺气肿13例，中度肺气肿34例，重度肺气肿23 例；58例与临床分级相同，符合率达96.7%。结论 吸气相CT肺功能成像能更准确、直观的反应肺气肿的分布情况， 特别是对上肺的肺气肿，更客观的反应肺气肿的分级，而且能区分肺气肿的病因；对其临床诊断、治疗与预后有重 要的临床意义。

Objective To investigate the value of CT Pulmonary Function Imaging of the inspiratory phase of senile emphysema. Methods 60 cases with senile emphysema were selected in this study, which were underwent 16-slice spiral thin slice CT scan and made grading of emphysema according to lung function CT imaging. Results Mild emphysema in 13 cases, 34 cases of moderate emphysema, severe emphysema, 23 cases; 58 patients with clinical grading 96.7%. Conclusion Inspiratory phase CT lung function imaging can be more accurate, the intuitive reaction emphysema distribution, especially for the upper lung emphysema, more objective reaction emphysema classification, and can distinguish the cause of emphysema, its clinical diagnosis, treatment and prognosis of clinical significance.