Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is mildly enlarged . The aortic arch is calcified . Patchy bibasilar opacities suggest minor atelectasis . There is upper zone redistribution of pulmonary vascularity suggesting pulmonary venous hypertension without frank congestive heart failure . There is no free air . There is no definite pleural effusion or pneumothorax . No free air is seen .
    OUTPUT:
    
Mild upper zone redistribution of pulmonary vascularity suggesting pulmonary venous hypertension , mild cardiomegaly , and slight bibasilar atelectasis suspected , but no evidence for pneumonia .