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目的肺气肿病人CT肺容积和密度测量1周后重复评估。评估屏气对重复性的影响。方法 44例病人间隔7d在吸气状态行HRCT检查,计算CT肺容积、密度在-950HU(RA950-raw)以下相关区,第15百分位数密度(PD15-raw)。通
Objective To evaluate the CT lung volume and density in patients with emphysema after 1 week of measurement. Evaluate the effect of breath holding on repeatability. Methods Forty-four patients underwent HRCT examination at inhalation for 7 days. The volume of CT lung was calculated. The density of the lung was lower than -950HU (RA950-raw), the 15th percentile density (PD15-raw). through