Correlation between small airway diseases of lung and inspiratory phase as well as expiratory phase CT chest scanning
Abstract：Objective To investigate the application value of inspiratory phase CT scanning combined with expiratory phase HRCT scanning in evaluating HRCT image manifestations and related parameters in diagnosis of small airway lesions of patients with long-term smoking without symptoms .Methods Seventy patients with long-term smoking were served as smoking group,the other 30 patients without smoking were served as control group .The patients in both groups underwent chest deep inspiration end CT scanning with spiral CT combined with deep expiration end HRCT scanning to observe mainly air retention images at the end of expiration ,and to measure and calculate related parameters in order to analyze the correlation between these parameters and small airway diseases .Results The male smokers were significantly more than female smokers .There were significant differences in the parameters of lung volume between smoking group and control group ( P <0.05), and these parameters included inspiratory phase lung volume , expiratory phase lung volume , low attenuation area ratio in inspiratory phase, low attenuation area ratio in expiratory phase , average lung field density in inspiratory phase , average lung field density in expiratory phase , ratio of expiration lung volume/inspiration lung volume ,ratio of expiration average lung field density/inspiration average lung field density , the difference in lung volume between expiration and inspiration , the difference in average lung field density between expiration and inspiration .However except for inspiratory phase lung volume ,there were no significant differences in the other parameters of lung volume between mild smokers and heavy smokers ( P >0.05). Conclusion The chest expiratory phase HRCT scanning can show clearly the characteristic manifestations of air retention ,and chest expiratory phase HRCT scanning combined with inspiratory phase CT scanning and related parameters analysis plays an important role in early diagnosis of small airway diseases , with higher sensitivity, thus, which is a convenient and quick detection method and is worth using widely in clinical practice .
Keywords：smokingpulmonary diseasesmall airway diseaseHRCT Mosaic attenuationair retention
Publication Date：2016-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 2432-2435,2439 )