Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Rotated positioning . Allowing for this , there is probably mild mild enlargement of the cardiac silhouette . There is stable tortuosity of the thoracic aorta . There is a small to moderate left pleural effusion with associated atelectasis . No overt CHF .
    OUTPUT:
    
Mild cardiomegaly with small left pleural effusion with underlying collapse and / or consolidation . Compared with ___ , the effusion is slightly larger .