Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable view of the chest demonstrates low lung volumes . No large pleural effusion , pneumothorax or focal consolidation . The aorta is markedly tortuous without focal aneurysmal changes . Heart is mildly enlarged . Mild perihilar vascular congestion is noted .
    OUTPUT:
    
Mild cardiomegaly and perihilar vascular congestion .