Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are relatively low with left basilar atelectasis , unchanged from the prior study with persistent mild pulmonary vascular congestion , also stable since the prior radiograph . There is no evidence of focal opacity , pleural effusion or pneumothorax . The cardiomediastinal silhouette is stable .
    OUTPUT:
    
Persistent mild pulmonary vascular congestion and left basilar atelectasis with no evidence of focal pneumonia .