Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Bilateral lung volumes are low . Bibasilar lung opacities likely atelectasis , left side more than right , and mild to moderate left pleural effusion is present . Because of the left lower lung opacities obscuring the cardiac margin , assessment of heart was limited . Mediastinal and hilar contours are normal .
    OUTPUT:
    
Bibasilar atelectasis , left side more than right , and minimal - moderate left pleural effusion .