Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The left subclavian catheter again extends to the mid SVC . There is no pneumothorax . There is small left pleural effusion , unchanged , with no right pleural fluid identified . Lung volumes remain low , with resultant bronchovascular crowding and basilar atelectasis . Heart size and hilar contours are unchanged . There is no new opacity to suggest pneumonia . Vascular congestion persists , with slightly increased edema noted on the left .
    OUTPUT:
    
Pulmonary vascular congestion and low lung volumes are again noted , with slightly worsened pulmonary edema apparent on the left . No new opacity to suggest pneumonia . Small left effusion .