Imaging CXR not useful for dx but may exclude alternative dx or establish resp CV skeletal comorbidities Consider chest CT for pts w persistent exac sx out of proportion to dz severity on lung fxn testing FEV1

<b>Imaging:</b> CXR not useful for dx but may exclude alternative dx or establish resp/CV/skeletal comorbidities. Consider chest CT for pts w/ persistent exac, sx out of proportion to dz severity on lung fxn testing, FEV₁ <45% predicted w/ significant hyperinflation/gas trapping, or if lung CA screening criteria are met.