Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette size is normal . The mediastinal and hilar contours are unchanged with tortuosity of the thoracic aorta appearing similar . The pulmonary vasculature is not engorged . Patchy opacities in the lung bases likely reflects atelectasis without focal consolidation . No pleural effusion or pneumothorax is demonstrated . Marked degenerative changes of the left glenohumeral joint are again noted with osteophyte formation . 2 rounded calcific densities projecting over the right scapula may reflect loose bodies , unchanged from the previous chest radiograph .
    OUTPUT:
    
Patchy opacities in the lung bases most likely reflects atelectasis , though aspiration is not completely excluded in the correct clinical setting . No focal consolidation .