Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . This accentuates the size of the cardiac silhouette which appears mild to moderately enlarged . Mediastinal and hilar contours are similar . Pulmonary vasculature is not engorged . 3 .4 cm rounded opacity within the right middle lobe corresponds to the mass seen on previous CT . Streaky opacities in the lung bases likely reflect areas of atelectasis . No new focal consolidation , pleural effusion or pneumothorax is identified . Chronic bilateral rib fractures are again demonstrated as well as a healed fracture of the right proximal humerus .
    OUTPUT:
    
Low lung volumes with bibasilar atelectasis . Re - demonstration of right middle lobe mass , better seen on recent CT .