Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are low lung volumes . This accentuates the size of the cardiac silhouette which is likely top normal . There is crowding of the bronchovascular structures but no evidence of pulmonary edema . The mediastinal and hilar contours are otherwise within normal limits . Previously described subpleural left lower lobe opacity seen on prior chest radiograph which corresponds to an area of pleural fat on CT appears more prominent on the current exam . Bilateral patchy opacities in the lung bases may reflect areas of infection or atelectasis . There are small bilateral pleural effusions . No pneumothorax is identified , and there are no acute osseous abnormalities .
    OUTPUT:
    
1 . Ill - defined patchy opacities in lung bases which may represent areas of infection or atelectasis . Small bilateral pleural effusions are present . 2 . Subpleural opacity in the left lower lobe appears more prominent on the current exam , and corresponds to an area of pleural fat as noted on the prior chest CT .