Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . Heart size is mild to moderately enlarged . The aortic knob is calcified . Mediastinal and hilar contours are unremarkable . Crowding of bronchovascular structures may be due to low lung volumes . Patchy opacities in the lung bases likely reflect areas of atelectasis . Small left pleural effusion can not be completely excluded . There is no pneumothorax . Well corticated ossific densities are noted projecting over both glenohumeral joints , likely loose bodies .
    OUTPUT:
    
Low lung volumes with patchy atelectasis in the lung bases . Infection is not excluded in the correct clinical setting . There may be a small left pleural effusion .