Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest demonstrate low lung volumes . Heart is mildly enlarged . There is no pleural effusion , focal consolidation or pneumothorax . Hilar and mediastinal silhouettes are unremarkable . Perihilar vascular congestion is noted . Partially imaged upper abdomen is unremarkable .
    OUTPUT:
    
Low lung volumes . Mild cardiomegaly and perihilar vascular congestion , slightly progressed since ___ exam .