Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: On today 's exam , there is suggestion of background COPD . There is moderate cardiomegaly , with a tortuous aorta . The left hemidiaphragm is slightly elevated . This appearance is in keeping with the ___ radiograph . Slight hilar prominence is also similar to the prior study and could reflect an element of pulmonary hypertension . There is upper zone redistribution , without overt CHF . There are patchy opacities at both lung bases similar , but slightly more pronounced , than on the ___ study and also more pronounced on the ___ CT .
    OUTPUT:
    
1 . COPD and cardiomegaly with a tortuous aorta and possible pulmonary hypertension . 2 . Upper zone redistribution , without other evidence of CHF . 3 . Patchy opacity at both bases . This may very well represent atelectasis or scarring , but it is more pronounced than on the ___ radiograph and the differential could include areas of aspiration or infectious infiltrate . Clinical correlation is requested .