Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient is somewhat rotated . There is a right retrocardiac opacity that corresponds to opacification along the lower thoracic spine on the lateral view . There are small bilateral pleural effusions . There is no pneumothorax . Patchy and linear opacities are seen within the left lung base and are likely due to atelectasis . The cardiomediastinal silhouette is stable .
    OUTPUT:
    
1 . Right retrocardiac opacity , representing either atelectasis or pneumonia . Short term followup CXR is recommended for evaluation of interval resolution . 2 . Small bilateral pleural effusions .