Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single frontal view of the chest was obtained . There is mild vascular congestion . Mild bibasilar atelectasis is seen . It is difficult to exclude a left pleural effusion and the left costophrenic angle is not fully included on the image . The cardiac silhouette is mildly enlarged . Mediastinal contours are unremarkable . No pneumothorax is seen .
    OUTPUT:
    
Vascular congestion . Difficult to exclude small left pleural effusion .