Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Moderate cardiomegaly appears increased compared to the prior exam . Aorta remains tortuous . No overt pulmonary edema is demonstrated . Patchy opacities in the lung bases are noted , more so on the right , possibly reflective of atelectasis though infection or aspiration is difficult to exclude . Possible trace left pleural effusion may be present . No pneumothorax is identified . No acute osseous abnormalities are seen .
    OUTPUT:
    
Patchy bibasilar opacities could reflect atelectasis but infection or aspiration can not be excluded . Possible trace left pleural effusion .