Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . Heart size is accentuated as a result and appears mildly enlarged . Mediastinal and hilar contours are unremarkable . Pulmonary vasculature is not engorged . Patchy opacities are noted in the lung bases , more so on the left . No pleural effusion or pneumothorax is clearly identified . Marked degenerative changes of the right glenohumeral joint are seen .
    OUTPUT:
    
Low lung volumes with patchy opacities in the lung bases . These may reflect areas of atelectasis though infection or aspiration can not be completely excluded .