Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Low lung volumes contribute to the exaggerated cardiac size although it is still mildly enlarged . The aorta is tortuous but stable . No pleural effusion , pneumonia or pneumothorax . Difference in densities between hila , right greater than left , are explained by calcifications of right hilar nodes as seen on the CT from ___ .
    OUTPUT:
    
No evidence of pneumonia .