Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are hyperinflated , consistent with COPD . Probable mild cardiomegaly . The aorta is calcified an minimally unfolded . Cardiomediastinal silhouette is otherwise within normal limits . No CHF or pleural effusion is identified . Minimal retrocardiac opacity is noted -- this is compatible with atelectasis , but an early infectious infiltrate can not be entirely excluded . Minimal subsegmental atelectasis at the right base . Deformity of both humeral heads is compatible with severe glenohumeral osteoarthritis , possibly with associated humeral head osteonecrosis .
    OUTPUT:
    
1 . Bibasilar atelectasis . The possibility of an early pneumonic infiltrate at the left base can not be entirely excluded . 2 . Background COPD and mild cardiomegaly , without CHF . 3 . Bilateral glenohumeral osteoarthritis , with possible associated humeral head osteonecrosis .