Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is moderately enlarged . The aorta is tortuous and shows mural calcification at its arch . Lung volumes are low which accentuate bronchovascular markings . The lungs are clear without focal consolidation , pleural effusion or pneumothorax . A right third rib fracture is unchanged in appearance . Of note , there are low lung volumes on the frontal view which accentuates the transverse diameter of the heart and bronchovascular markings . Bibasilar opacities on the frontal view are most likely due to atelectasis , and are not demonstrated on the lateral view with a better inspiration .
    OUTPUT:
    
No evidence of pneumonia . No pneumothorax .