Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are low in volume with linear scarring or atelectasis in the left mid lung . There is no pleural effusion or pneumothorax . Mild pulmonary vascular congestion is improved . The heart is top normal in size with normal mediastinal contours .
    OUTPUT:
    
Mild pulmonary vascular congestion without acute intrathoracic process .