Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Evaluation of the study is somewhat limited by patient rotation . There are low lung volumes . The cardiac silhouette size is enlarged , similar when compared to the prior study . There is mild pulmonary edema with perihilar haziness and vascular indistinctness , not significantly different when compared to prior study . A small to moderate right pleural effusion is increased when compared to the prior exam . Right basilar opacification may reflect atelectasis , though infection can not be completely excluded . No pneumothorax is present . Gaseous distention of the stomach noted .
    OUTPUT:
    
Mild pulmonary edema with increased size of small to moderate right pleural effusion and right basilar opacity , possibly reflecting atelectasis but infection is not excluded .