All the subjects were divided into 5 groups according to the ages. Changes with aging of lung inspiratory and expiratory HRCT quantitative parameters and the correlation with PFT results were assessed.

• 将所有受试者按年龄分为5组，评价随年龄增加肺吸气相呼气相定量指标的变化，及其与肺功能的相关性。