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 moderately enlarged . The mediastinal and hilar contours are unchanged . There is crowding of the bronchovascular structures without overt pulmonary edema . Streaky bibasilar opacities are more pronounced in the left lung base , and likely reflect areas of atelectasis . A small left pleural effusion is likely present . No pneumothorax is detected . No acute osseous abnormalities seen . No subdiaphragmatic free air is present .
    OUTPUT:
    
Bibasilar atelectasis , more pronounced on the left , with small left pleural effusion . No subdiaphragmatic free air .