Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild pulmonary vascular congestion without frank pulmonary edema is slightly increased compared with the immediate prior study . There is no focal consolidation , pleural effusion , or pneumothorax . Linear opacities in the left lung base likely represent a combination of atelectasis and scarring . The cardiomediastinal silhouette is stable .
    OUTPUT:
    
Mild pulmonary vascular congestion without frank pulmonary edema . No focal consolidation .