Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is rotated . There is a vague , increased opacity of the right lower lobe . There is no pleural effusion or pneumothorax . The pulmonary vasculature is normal . The cardiac silhouette is normal in size . The mediastinal and hilar structures are unremarkable .
    OUTPUT:
    
Vague , increased opacity within the right lower lobe may reflect atelectasis , although , pneumonia can not be excluded in the correct clinical setting .