Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate clear lungs without effusion or pneumothorax . There is hyperexpansion and flattening of the hemidiaphragms consistent with a diagnosis of COPD . Minimal bibasilar opacity may reflect minimal atelectasis . The heart size is normal , the mediastinal contours are unremarkable . A two lead left chest AICD is stable in appearance . The pulmonary vasculature is normal .
    OUTPUT:
    
Minimal bibasilar atelectasis . There is no evidence of cardiac decompensation .