Most of the pulmonary quantitative CT parameters had mild to moderate correlations with the pulmonary function parameters, among which the correlation between FEV1/FVC and pulmonary parenchyma attenuation parameters was the strongest, which showed a moderately significant correlation, while no significant correlation was found between the ratio of FEV1/FVC and the airway parameters.
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Subtyping preserved ratio impaired spirometry (PRISm) by using quantitative HRCT imaging characteristics.
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