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目的 研究支气管扩张 (支扩 )病人的肺高分辨率CT的呼气相表现。方法 2 1例支扩患者进行HRCT的吸、呼气相扫描的肺功能检查 ,观察支扩和空气潴留的累及范围 ,统计患者双肺吸 -呼气相密度差值 (VD)、面积缩小率 (AR)和空气潴留评分值 ,将它们与肺功能试验结果进行相关性分析。结果 空气潴留征可见于支扩未累及的层面 ;双肺VD、双肺AR、空气潴留评分值与肺功能试验的结果存在显著性相关。结论 呼气相HRCT辅助吸气相能对支扩进行评价。通过呼气相HRCT的定量指标可以评价患者的肺通气功能状况
Objective To study the expiratory appearance of lung high resolution CT in patients with bronchiectasis (branch expansion). Methods Twenty-one cases of patients with branch expansion were examined for lung function by HRCT and breath scan, and the extent of branch expansion and air retention were observed. The differences of lung suction-exhalation density (VD), area reduction rate (AR) and air retention scores, and their correlation with lung function test results. Results Air retention signs can be seen in the non-involved extension bronchiectasis level; double lung VD, lung AR, air retention score and pulmonary function test results were significantly related. Conclusion Expiratory HRCT-assisted inhalation phase energy evaluation of the expansion. Quantitative indices of expiratory HRCT can be used to evaluate the patient’s pulmonary ventilation status