Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A portable frontal chest radiograph demonstrates low lung volumes compared to the prior chest radiograph , with mild prominence of the heart and bronchovascular crowding . There is no focal consolidation , pleural effusion , or pneumothorax . There may be mild vascular congestion , right lower lung greater than left . The visualized upper abdomen is unremarkable .
    OUTPUT:
    
1 . No evidence of pneumonia . 2 . Mild vascular congestion , right lower lung greater than left .