Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . Bibasilar opacities are likely in part due to atelectasis . There is new vascular congestion without overt edema . Possible left pleural effusion is again noted . Cardiomediastinal silhouette is stable . No acute osseous abnormalities .
    OUTPUT:
    
Low lung volumes with superimposed vascular congestion and bibasilar atelectasis . Possible left pleural effusion .