Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear with the exception of linear lower lobe atelectasis . The heart is top - normal in size with tortuous aorta . Mediastinal and hilar contours are otherwise unremarkable . There is no pleural effusion or pneumothorax . There is possible minimal pulmonary vascular congestion .
    OUTPUT:
    
Possible minimal pulmonary vascular congestion . Otherwise , no acute intrathoracic process .