Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP and lateral views of the chest again demonstrate elevation of the left hemidiaphragm . Relatively low lung volumes are seen with crowding of the bronchovascular markings , noting that mild pulmonary vascular congestion is possible . Possible left effusion seen posteriorly on the lateral view . Cardiomediastinal silhouette is within normal limits . No acute osseous abnormality is identified .
    OUTPUT:
    
Possible mild pulmonary vascular congestion and left effusion .