Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A left - sided pacemaker device is noted with lead terminating in right ventricle , unchanged . Mild enlargement of cardiac silhouette appears relatively unchanged compared to the prior exam . The aorta remains tortuous . There is perihilar haziness and vascular indistinctness with alveolar opacities most pronounced in the right lung base . Findings are concerning for asymmetric moderate pulmonary edema , though infection in the right lung base can not be fully excluded . No large pleural effusion or pneumothorax is seen . There are no acute osseous abnormalities .
    OUTPUT:
    
Findings concerning for moderate asymmetric pulmonary edema , right worse than left , but infection can not be completely excluded in the right lung base . Follow up radiographs after diuresis are recommended for further assessment .