Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild bibasilar opacities are probably reflect atelectasis . There is no pneumothorax or large pleural effusion . Prominent pulmonary vessels are similar to before . Mildly enlarged cardiac silhouette is similar to before . Widened mediastinum likely reflect mediastinal fat as demonstrated on prior CT abdomen and pelvis .
    OUTPUT:
    
No radiographic evidence of pneumonia or pulmonary edema . No radiological explanation for hypoxia is identified .