Abstract：Objective To investigate the high-resolution CT (HRCT)features of pulmonary interstitial disease secondary to pulmonary tuberculosis.Methods A total of 68 patients with pulmonary interstitial disease secondary pulmonary tuberculosis admitted to Jingdezhen Fifth People's Hospital from June 2018 to December 2021 were selected as the research objects.The imaging characteristics of HRCT examination of the patients were analyzed,including lesion location,distribution characteristics and accompanying signs.Results HRCT showed that the lesions in patients with secondary pulmonary tuberculosis mainly with interstitial changes were more common in the upper lobe of the lung,involving a total of 155 lung segments,and the lesions of the posterior segment of the left and right upper lobe of the lungs accounted for 33.55% (52/155) and 30.97% (48/155)respectively.The proportions of lesion specific parts of middle segment of lung and interlobar pleura were higher with 48.39% (75/155) and 36.13% (56/155) respectively.There were abnormalities in the interlobular interstitium,and the detection rates of fine nodules and intralobular fine reticulate shadows was 100%.The proportion of cavitation sign in patients with positive sputum culture was higher than that in patients with negative sputum culture,the difference was statistically significant(P＜0.05).Conclusion HRCT examination can clearly show the subtle lesions in the pulmonary lobules of patients with secondary pulmonary tuberculosis mainly with interstitial changes.The focal location and morphological characteristics of the lesions can be used as the basis for distinguishing the disease from other pulmonary interstitial lesions,with high diagnostic value.
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